CN102420627A - Communication terminal position judging device - Google Patents

Communication terminal position judging device Download PDF

Info

Publication number
CN102420627A
CN102420627A CN2011101728101A CN201110172810A CN102420627A CN 102420627 A CN102420627 A CN 102420627A CN 2011101728101 A CN2011101728101 A CN 2011101728101A CN 201110172810 A CN201110172810 A CN 201110172810A CN 102420627 A CN102420627 A CN 102420627A
Authority
CN
China
Prior art keywords
antenna
communication terminal
magnetic field
electron key
electric wave
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN2011101728101A
Other languages
Chinese (zh)
Inventor
熊谷胜秀
佐口信也
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tokai Rika Co Ltd
Original Assignee
Tokai Rika Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP2010214426A external-priority patent/JP2011147104A/en
Application filed by Tokai Rika Co Ltd filed Critical Tokai Rika Co Ltd
Publication of CN102420627A publication Critical patent/CN102420627A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C23/00—Devices for measuring, signalling, controlling, or distributing tyre pressure or temperature, specially adapted for mounting on vehicles; Arrangement of tyre inflating devices on vehicles, e.g. of pumps or of tanks; Tyre cooling arrangements
    • B60C23/02—Signalling devices actuated by tyre pressure
    • B60C23/04—Signalling devices actuated by tyre pressure mounted on the wheel or tyre
    • B60C23/0408—Signalling devices actuated by tyre pressure mounted on the wheel or tyre transmitting the signals by non-mechanical means from the wheel or tyre to a vehicle body mounted receiver
    • B60C23/0422—Signalling devices actuated by tyre pressure mounted on the wheel or tyre transmitting the signals by non-mechanical means from the wheel or tyre to a vehicle body mounted receiver characterised by the type of signal transmission means
    • B60C23/0433—Radio signals
    • B60C23/0435—Vehicle body mounted circuits, e.g. transceiver or antenna fixed to central console, door, roof, mirror or fender
    • B60C23/0444—Antenna structures, control or arrangements thereof, e.g. for directional antennas, diversity antenna, antenna multiplexing or antennas integrated in fenders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C23/00—Devices for measuring, signalling, controlling, or distributing tyre pressure or temperature, specially adapted for mounting on vehicles; Arrangement of tyre inflating devices on vehicles, e.g. of pumps or of tanks; Tyre cooling arrangements
    • B60C23/02—Signalling devices actuated by tyre pressure
    • B60C23/04—Signalling devices actuated by tyre pressure mounted on the wheel or tyre
    • B60C23/0408—Signalling devices actuated by tyre pressure mounted on the wheel or tyre transmitting the signals by non-mechanical means from the wheel or tyre to a vehicle body mounted receiver
    • B60C23/0415—Automatically identifying wheel mounted units, e.g. after replacement or exchange of wheels
    • B60C23/0416—Automatically identifying wheel mounted units, e.g. after replacement or exchange of wheels allocating a corresponding wheel position on vehicle, e.g. front/left or rear/right

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Lock And Its Accessories (AREA)

Abstract

The invention is a communication terminal position judging device which can restrain and reduce the antenna number of a communication host and can detect the position of a communication terminal more precisely. A vehicle transmitter (10) which takes a double-shaft antenna as a keyless operating system is provided. The double-shaft antenna is provided with a pair of coil type rod antennas (16a, 16b), and the shafts of the antennas (16a, 16b) are perpendicular to each other. In the intelligent communication, a first coil type rod antenna (16a) and a second coil type rod antenna (16b) of the double-shaft antenna transmit electric waves alternately. The magnetic field intensity of an electronic key (2) can be calculated when the electronic key (2) receives the electric wave from the first coil type rod antenna (16a), and the magnetic field intensity of the electronic key (2) can be calculated when the electronic key (2) receives the electric wave from the second coil type rod antenna (16b), and then the position of the electronic key (2) can be judged via the difference of the magnetic field intensities.

Description

The communication terminal position judgment device
Technical field
The present invention relates to a kind of communication terminal position judgment device that the position of communication terminal (communicator) is judged.
Background technology
In the past, electron key system was widely used, and it is sent to the ID code vehicle and carries out the ID verification by vehicle from the electron key as car key with wireless mode.As said electron key system; Can enumerate Intelligent key operating system; In this Intelligent key operating system, send the requirement of writing in reply and requiring from vehicle, and reply and carry out the ID verification from the ID code that electron key has been beamed back according to this requirement is made as the ID code.Exempt to comprise in the key operated system smart entry system and one-touch engine starting system.In smart entry system,, just allow or carry out locking or release to car door if the ID verification outside car is set up.In one-touch engine starting system, if the ID verification in car is set up, the tail-off that need only press in the operation car just can ato unit.
As one type of said electron key system, TOHKEMY 2004-84406 communique and TOHKEMY 2005-76329 communique have been put down in writing the technology that the position of electron key is judged.Shown in figure 16; In this technology; Driver's seat car door 81 sides (vehicle body right side) at vehicle 80 are provided with antenna 83; And be provided with antenna 84 in co-pilot seat car door 82 sides (vehicle body left side), the transmission electric wave that vehicle comes from each antenna 83,84 through 85 pairs of logic determines electron keys is made and is replied replying of beaming back, and judges key position.In said logic determines key position detection mode; Send requirement from the driver's seat antenna 83 that is arranged on the vehicle body right side with the co-pilot seat antenna that is arranged on the vehicle body left side 84 in order; And form driver's seat antenna area 86 and co-pilot seat antenna area 87 in order; Vehicle is made these requirements through logic determines electron key 85 and is replied the ID code beamed back, promptly replys, and judges key position.
For example, make in the requirement of 85 pairs of driver's seat antennas 83 of electron key and to reply, and the requirement of co-pilot seat antenna 84 is not made under the situation of replying, can judge that electron key 85 is positioned at outside the car.In addition, the requirement of driver's seat antenna 83 is not made at electron key 85 and to be replied, and the requirement that comes from co-pilot seat antenna 84 is made under the situation of replying, can judge that electron key 85 is positioned at outside the car yet.Further, reply, will judge that electron key 85 is positioned at car if the requirement of the requirement of driver's seat antenna 83 and co-pilot seat antenna 84 all made.
In logic determines key position detection mode shown in Figure 16, can detect key through a pair of antenna that is arranged on the vehicle body left and right sides and be positioned at outer position of car and the position of Che Nei.Therefore; With for example come the situation that the position of electron key is detected is compared through car outside antenna and a plurality of antennas of further in car, being provided with as the car internal antenna are set on each car door; Logic determines key position detection mode has following advantage: only in the left and right sides of vehicle body antenna being set gets final product, thus number that can corresponding minimizing antenna.
Patent documentation 1: TOHKEMY 2004-84406 communique
Patent documentation 2: TOHKEMY 2005-76329 communique
Yet the zone boundary of the antenna area 86,87 of antenna 83,84 is not necessarily consistent with Che Nei and car borderline phase outward.Therefore, shown in figure 17, in logic determines key position judgment mode, the antenna area 86 of driver's seat antenna 83 spills to the outside of co-pilot seat car door 82 sometimes, and perhaps the antenna area 87 of co-pilot seat antenna 84 spills to the outside of driver's seat car door 81.Like this; The problem that the false judgment key position can occur; For example be positioned at spill regional 88 o'clock of driver's seat antenna area 86,, judge that electron key 85 is positioned at driver's seat car door 81 sides although electron key 85 is positioned at co-pilot seat car door 82 sides in the co-pilot seat side at electron key 85.
At this, spill and do not make co-pilot seat antenna area 87 to spill in order not make driver's seat antenna area 86 to the outside of co-pilot seat car door 82, as long as set each antenna area 86,87 narrowlyer to the outside of driver's seat car door 81.Yet, if set antenna area 86,87 narrowlyer, can appear at the situation that produces zero signal zone in the car on the contrary again, so the problem of the electron key 85 that is positioned at car can occur correctly detecting.Therefore, in existing system, owing to be difficult at length divide each antenna area 86,87, some can judge the technology of the position of electron key 85 more accurately so hope exploitation.
In addition, said problem is not limited to electron key system, in the various systems that communicate through wireless between, all said problem can occur.
Summary of the invention
The objective of the invention is to, provide a kind of number of antenna that can suppress communication host that it is tailed off, and the communication terminal position judgment device that can judge the position of communication terminal more accurately.
In order to address the above problem a little; The present invention is a kind of communication terminal position judgment device that goes for wireless system; The communication terminal that said wireless system comprises communication host and carries out two-way communication with this communication host; It is characterized in that possessing: be connected multiaxis one body antenna on the said communication host, this multiaxis one body antenna comprises the 1st antenna element and the 2nd antenna element of the different direction configuration of axial court at least; Indivedual implementation portions that send, it makes electric wave individually send from said the 1st antenna element and the 2nd antenna element when the ID verification; Receiving intensity is obtained portion, and it obtains receiving intensity and the receiving intensity when said communication terminal has received the electric wave that comes from said the 2nd antenna element when said communication terminal has received the electric wave that comes from said the 1st antenna element; Intensity difference is calculated portion, and it calculates the intensity difference of 2 said receiving intensities; With position judgment portion, it judges the position of said communication terminal through said intensity difference.
Based on the present invention, the number of antenna that can suppress communication host tails off it, and can detect the position of communication terminal more accurately.
Description of drawings
Fig. 1 is that the summary of exempting from key operated system to the 1st execution mode constitutes the block diagram show.
Fig. 2 constitutes the pie graph that shows to the parts of 2 one body antennas.
Fig. 3 is the concept map that the profile of electric wave that 2 one body antennas are radiated shows.
Fig. 4 is a correlation diagram, the relational of the magnetic field intensity difference when it is presented at each antenna that makes 2 one body antennas and sends individually.
Fig. 5 is the synoptic diagram that the detection profile to the outer verification of car shows.
Fig. 6 is the synoptic diagram that the detection profile to verification in the car shows.
Fig. 7 is the synoptic diagram that the profile that results from the zero signal zone in the car is shown.
Fig. 8 is a correlation diagram, the relational of the magnetic field intensity difference when it is presented at two antennas that make 2 one body antennas and sends simultaneously.
Fig. 9 is the circuit block diagram that the electric formation of exempting from key operated system is shown.
Figure 10 is the time chart that the communication sequence to intelligence communication shows.
Figure 11 constitutes the pie graph that shows to the summary of the key position judgment means of the 2nd execution mode.
Figure 12 is the pie graph that the concrete example to other key position judgment means shows.
Figure 13 is the synoptic diagram of the tire pressure monitoring system of the 3rd execution mode.
Figure 14 is the synoptic diagram of other tire pressure monitoring system.
Figure 15 is the synoptic diagram of other tire pressure monitoring system.
Figure 16 is that the summary in the past electron key system constitutes the sketch map that shows.
Figure 17 is the sketch map that the state that spills the zone that on vehicle, is formed with antenna is shown.
Embodiment
(the 1st execution mode)
Below, with reference to Fig. 1～Figure 10, the 1st execution mode of communication terminal position judgment device that the present invention is specialized is described.
As shown in Figure 1; Vehicle 1 is provided with the key operated system 3 that exempts from; Saidly exempt from a kind of for the electron key system that carries out the key verification through wireless mode of key operated system 3; In this system, if electron key 2 will automatically be carried out ID (Identification) verification near vehicle 1.Saidly exempt to comprise in the key operated system 3 smart entry system and one-touch engine starting system; In smart entry system; In the series of operation process of door contact interrupter, can not carry out carrying out under the actual key operated state locking or release to car door; In one-touch engine starting system, need only press the touch-tone tail-off 4 of operation setting in car just can ato unit.In addition, in this example, electron key 2 constitutes communication terminal, exempts from key operated system 3 and constitutes wireless system and electron key system.
In this case; Vehicle 1 be provided with and electron key 2 between carry out the engine starting gear 7 of action of car door locking device 6 and management engine of key calibration equipment 5, the action of management door lock of ID verification, these devices connect through car internal bus 8.Key calibration equipment 5 is provided with the verification ECU (Electronic Control Unit) 9 as the control unit of this key calibration equipment 5.In the memory (diagram slightly) of verification ECU9, login the ID code that has with vehicle 1 electron key 2 in groups.
At the vehicle transmitter 10 that is connected with the electric wave that in vehicle periphery and car, sends LF (Low Frequency) band on the verification ECU9 with receive the vehicle tuner 11 of the electric wave of UHF (Ultra High Frequency) band.Middle position in the overall width direction of vehicle 1 is provided with 1 vehicle transmitter 10, and the electric wave of this vehicle transmitter 10 through the LF band constantly sends as what the ID for electron key 2 returned that letter requires and require signal Srq.In addition, in this example, verification ECU9 is equivalent to communication host, and vehicle transmitter 10 also constitutes multiaxis one body antenna.
Electron key 2 is provided with central controlled communication control unit 12 is carried out in the action of electron key 2.Login has the ID code as the intrinsic ID of key in the memory (diagram slightly) of communication control unit 12.On communication control unit 12, be connected with the LF receiver 13 of the electric wave that can receive LF band and can send the UHF transmitter 14 of the electric wave of UHF band.Electron key 2 receives through LF receiver 13 1 and requires signal Srq, and just the electric wave through UHF transmitter 14 usefulness UHF band sends the ID signal Sid that comprises the ID code.
When electron key 2 is positioned at outside the car, constantly sends by vehicle transmitter 10 and to require signal Srq.At this moment, electron key 2 one receives and requires signal, just this is required signal Srq to make to reply and beams back ID signal Sid through the electric wave of UHF band.ID signal Sid comprises the ID code of electron key 2.If verification ECU9 receives ID signal Sid through vehicle tuner 11 and establishes the outer intelligence communication (car is communicated by letter) of car outward, just carry out as the outer verification of the car of ID verification (intelligent checking).Then, if the outer verification of car is set up, just allow or carry out locking or release through the car door of car door locking device 6.
In addition, detecting the driver through for example gate controlled switch etc. when having got on the bus, at this moment also beginning to send and require signal Srq by vehicle transmitter 10.At this moment, if electron key 2 receives requiring signal Srq and establishing the intelligence communication (communication in the car) in the car of vehicle transmitter 10, verification ECU9 just carries out as verification in the car of ID verification (intelligence).Then, if verification is set up in the said car, just allow power source conversion operation and engine start operation through tail-off 4 (engine starting gear 7).
Like Fig. 1 and as shown in Figure 2; The key operated system 3 that exempts from of this example is provided with position judgment device 15, and this position judgment device 15 uses the position of judging electron key 2 as 2 one body antennas of vehicle transmitter 10 and through each magnetic field intensity difference.In addition, as shown in Figure 2, so-called 2 one body antennas are meant the antenna that possesses a pair of coil form bar antenna 16a, 16b, and the coil axis L1 of this a pair of antenna 16a, 16b, L2 arrange towards mutually perpendicular direction.Position judgment device 15 requires signal Srq and requires signal Srq through another axle also transmission through an axle transmission of 2 one body antennas; 15 pairs of this position judgment devices calculate at poor (the magnetic field intensity difference Hab) that electron key 2 has received these magnetic field intensitys when requiring signal Srq, and judge that through this magnetic field intensity difference Hab electron key 2 is positioned at car outward still outside the car.In addition, in this example, coil form bar antenna 16a is equivalent to the 1st antenna element, and coil form bar antenna 16b is equivalent to the 2nd antenna element.
Like Fig. 2 and as shown in Figure 3, vehicle transmitter 10 is provided with substrate 17, and this substrate 17 is the installation position of the electronic unit of vehicle transmitter 10, and a pair of coil form bar antenna 16a, 16b are installed on this substrate 17.Vehicle transmitter 10 possesses the 1st coil form bar antenna 16a and the 2nd coil form bar antenna 16b, and the coil axis L1 of the 1st coil form bar antenna 16a is towards the vehicle fore-and-aft direction, and the 2nd coil form bar antenna 16b coil axis L2 is towards the overall width direction.These coil form bar antennas 16a, 16b alignment arrangements and dispose with the mutually perpendicular form of coil axis L1, L2 separately at grade.Coil axis L1 (L2) is equivalent to the line of each coil arrangement direction of coil form bar antenna 16a (16b), promptly the line in coil inside magnetic field is passed through on the edge.
In the communication zone (field region) of these coil form bar antennas 16a, 16b, the magnetic field of length direction (axially) forms than big with the meet at right angles magnetic field of direction of this length direction.Therefore, as shown in Figure 3, these coil form bar antennas 16a, 16b form the communication zone of elliptical shape.In addition, in this routine coil form bar antenna 16a, 16b, the 1st coil form bar antenna 16a forms long oval communication zone Ea on the fore-and-aft direction of vehicle, and the 2nd coil form bar antenna 16b forms long oval communication zone Eb on the overall width direction.
Yet; Electron key 2 is under the situation that has received the electric wave that comes from vehicle transmitter 10; Calculate magnetic field intensity when having received the electric wave that comes from the 1st coil form bar antenna 16a (below; Be called the 1st magnetic field intensity Ha) and the magnetic field intensity difference Hab of the magnetic field intensity when having received the electric wave that comes from the 2nd coil form bar antenna 16b (below, be called the 2nd magnetic field intensity Hb), relation of this difference Hab is as shown in Figure 4.That is to say that owing to be the vehicle fore-and-aft direction both sides at center with vehicle transmitter 10, the 1st coil form bar antenna 16a is more effective than the 2nd coil form bar antenna 16b, so the value of the 1st magnetic field intensity Ha is bigger than the 2nd magnetic field intensity Hb.In this case, among the regional Ka of opposed a pair of the 1st judgement, the Ka, the 1st magnetic field intensity Ha is bigger than the 2nd magnetic field intensity Hb on the vehicle fore-and-aft direction.In addition, since more effective at overall width direction both sides the 2nd coil form bar antenna 16b that with vehicle transmitter 10 is the center than the 1st coil form bar antenna 16a, so the value of the 2nd magnetic field intensity Hb is bigger than the 1st magnetic field intensity Ha.In this case, among the regional Kb of opposed a pair of the 2nd judgement, the Kb, the 2nd magnetic field intensity Hb is bigger than the 1st magnetic field intensity Ha on the overall width direction.
So; The communication region partitioning of vehicle transmitter 10 does, being the center with vehicle transmitter 10 judges regional Ka, Ka and be the regional Kb of a pair of the 2nd judgement, the Kb of center opposed formation on the overall width direction with vehicle transmitter 10 in a pair of the 1st of opposed formation on the vehicle fore-and-aft direction.Judge that regional Ka, Ka, Kb, Kb are that the center forms crosswise and radial with vehicle transmitter 10 for these 4.
Therefore, as long as know that the 1st magnetic field intensity Ha is bigger than the 2nd magnetic field intensity Hb, just can discern electron key 2 and be positioned at the regional Ka of the 1st judgement, Ka.In addition, as long as know that the 2nd magnetic field intensity Hb is bigger than the 1st magnetic field intensity Ha, just can discern electron key 2 and be positioned at the regional Kb of the 2nd judgement, Kb.Therefore, this routine position judgment device 15 through calculating the 1st magnetic field intensity Ha and the 2nd magnetic field intensity Hb magnetic field intensity difference Hab and judge which type of value this intensity difference Hab gets, judge that electron key 2 is positioned at car still car outward.
As shown in Figure 1, verification ECU9 is provided with the 1st antenna and sends operating member 18, the 1 antennas individually and send operating member 18 individually and make a pair of coil form bar antenna 16a, 16b individually send electric wave.The 1st antenna sends operating member 18 initial the 1st coil form bar antenna 16a of use individually and electron key 2 is carried out intelligence communication, and after accomplishing this intelligence communication, this is carried out intelligence communication through the 2nd coil form bar antenna 16b and electron key 2.So, the 1st antenna send individually operating member 18 make through the 1st coil form bar antenna 16a carry out intelligence communication, the action of then carrying out intelligence communication through the 2nd coil form bar antenna 16b carries out continuously.In addition, in this example, the 1st antenna sends operating member 18 individually and is equivalent to send individually implementation portion.
In addition; The communication control unit 12 of electron key 2 is provided with magnetic field intensity and calculates portion 19, this magnetic field intensity calculate portion 19 calculate electron key 2 received come from vehicle transmitter 10 require signal Srq the time receiving intensity (RSSI:Received Signal Strength Indicator).Magnetic field intensity is calculated portion 19 the magnetic field intensity Hx of said receiving intensity as electric wave is calculated.Magnetic field intensity calculate portion 19 calculate electron key 2 received come from the 1st coil form bar antenna 16a require signal Srq the time magnetic field intensity Hx and received the magnetic field intensity Hx when requiring signal Srq at electron key 2 from the 2nd coil form bar antenna 16b.In addition, in this example, magnetic field intensity Hx constitutes receiving intensity.
In addition, communication control unit 12 is provided with magnetic field intensity notice portion 20, and this magnetic field intensity notice portion 20 will calculate the magnetic field intensity Hx that portion 19 calculates by magnetic field intensity and notify to vehicle 1 in the process that intelligence communication is carried out.When magnetic field intensity notice portion 20 is sent to vehicle 1 with ID signal Sid in intelligence communication, ID code and magnetic field intensity Hx are notified to vehicle 1.
The magnetic field intensity that is provided with verification ECU9 obtains portion 21, and magnetic field intensity obtains portion and obtains magnetic field intensity Hx from electron key 2 when intelligence communication.When intelligence communication, magnetic field intensity obtains portion 21 and obtains magnetic field intensity Hx with reference to the contained magnetic field intensity Hx of ID signal Sid.Magnetic field intensity obtains portion 21 and obtains the 1st magnetic field intensity Ha and the 2nd magnetic field intensity Hb when the 2nd coil form bar antenna 16b is used as transmitting antenna when the 1st coil form bar antenna 16a is used as transmitting antenna.In addition, in this example, magnetic field intensity is calculated portion 19, magnetic field intensity notice portion 20 and magnetic field intensity and is obtained portion 21 and constitute receiving intensities and obtain portion, and the 1st magnetic field intensity Ha and the 2nd magnetic field intensity Hb constitute receiving intensity separately.
Verification ECU9 is provided with position judgment portion 22, and the position of electron key 2 is judged by this position judgment portion 22 through the magnetic field intensity difference Hab of the 1st magnetic field intensity Ha and the 2nd magnetic field intensity Hb.Position judgment portion 22 1 obtains the 1st magnetic field intensity Ha and the 2nd magnetic field intensity Hb, just obtain these magnetic field intensitys Ha, Hb poor, be Chi magnetic field intensity difference Hab, and be that the basis judges that electron key 2 is positioned at car still car outward with this magnetic field intensity difference Hab.In addition, position judgment portion 22 formation intensity differences are calculated portion and position judgment portion.
As shown in Figure 5, when judging whether electron key 2 is positioned at outside the car, vehicle transmitter 10 is carried out electric wave with stronger transmission intensity (sending intensity VHi by force) and is sent, so that the electric wave of vehicle transmitter 10 arrives outside the car.At this moment outside car, the magnetic field composition of the 2nd coil form bar antenna 16b forms greatlyyer than the magnetic field composition of the 1st coil form bar antenna 16a.Therefore; When the car door to vehicle 1 carries out the action of release or locking; As long as the 2nd magnetic field intensity Hb is greater than the 1st magnetic field intensity Ha, position judgment portion 22 will judge that electron key 2 is positioned at the 2nd wide region and judges regional Kb1, is outer locking or the release that also allows car door of car.
In addition, as shown in Figure 6, when vehicle transmitter 10 carries out the electric wave transmission with strong transmission intensity VHi, rear portion in front portion and the car in car, the magnetic field composition of the 1st coil form bar antenna 16a forms greatlyyer than the magnetic field composition of the 2nd coil form bar antenna 16b.Therefore, when vehicle transmitter 10 sends electric wave with strong transmission intensity VHi, as long as the 1st magnetic field intensity Ha is bigger than the 2nd magnetic field intensity Hb, position judgment portion 22 will judge that electron key 2 is positioned at the 1st wide region and judges regional Ka1, is car.
At this, as shown in Figure 6, in the car inner region of overall width left and right directions, only detected the strong intensity VHi that send of 2 pairs of electron keys and made and replying, can't judge that then electron key 2 is positioned at car still car outward.Therefore; Under this routine situation, in car during verification, after the electric wave that will come from vehicle transmitter 10 sends with strong transmission intensity VHi; Carry out electric wave with more weak transmission intensity (weak transmission intensity VLow) again and send, thereby in car, form the judgement zone that narrows down to the overall width left and right directions.Position judgment portion 22 is also through judging whether electron key 2 is positioned at these narrow judgement zones and carries out car and judge.
Therefore, verification ECU9 is provided with the 2nd antenna and sends operating member 23, the 2 antennas individually and send operating member 23 individually and weaken to send to send after the intensity and require signal Srq.In car during verification, the 1st antenna send individually operating member 18 sent require signal Srq after, then the 2nd antenna sends operating member 23 individually and sends with weak transmission intensity VLow and require signal Srq.In addition, the 2nd antenna sends operating member 23 individually, and also to send operating member 18 individually the same with the 1st antenna, carries out electric wave continuously with the order of the 1st coil form bar antenna 16a → the 2nd coil form bar antenna 16b and send.Position judgment portion 22 1 receives 2 pairs of electron keys, and signal Srq makes replys with requiring of sending of weak transmission intensity VLow, will judge that electron key 2 is positioned at the 1st close limit and judges that regional Ka2 or the 2nd close limit judge regional Kb2, be car.In addition, the 2nd antenna sends operating member 23 individually and is equivalent to segment position judgment portion.
Yet, as shown in Figure 7, in car, have the zero point (zero signal zone 24) that the electric wave of vehicle transmitter 10 can't arrive sometimes.Suppose that electron key 2 is positioned at zero signal zone 24, the signal Srq that requires that comes from vehicle transmitter 10 just can't arrive electron key 2, thereby intelligence communication is false.Therefore, although can cause electron key 2 in car by false judgment for not in car, the problem of the position of the electron key 2 that can't judge rightly.Carried out electric wave separately when sending at the 1st coil form bar antenna 16a or the 2nd coil form bar antenna 16b, zero signal zone 24 forms the zone that these electric waves can't arrive.Shown in the example of Fig. 7, the 1st zero signal zone 24a, the 2nd zero signal zone 24b in the left oblique the place ahead of vehicle body, the 3rd zero signal zone 24c at the right tiltedly rear of vehicle body and the 4th zero signal zone 24d at the left oblique rear of vehicle body in the right oblique the place ahead of vehicle body arranged.
At this; As shown in Figure 3; When making the 1st coil form bar antenna 16a and the 2nd coil form bar antenna 16b send electric wave simultaneously; The magnetic direction of vehicle transmitter 10 of this moment does, the direction that the formed angle of magnetic direction of the magnetic direction of the 1st coil form bar antenna 16a and the 2nd coil form bar antenna 16b is divided into two, promptly towards 45 directions spent that tilt with respect to the 1st coil form bar antenna 16a (the 2nd coil form bar antenna 16b).So,, can fill up the 1st zero signal zone 24a and the 4th zero signal zone 24d through making electric wave with same phase formed communication zone Ec when the 1st coil form bar antenna 16a and the 2nd coil form bar antenna 16b send.Magnetic field intensity is calculated portion 19 and is incited somebody to action magnetic field intensity Hx at this moment as homophase resultant magnetic field intensity Hk.In addition, homophase resultant magnetic field intensity Hk is equivalent to the homophase electric wave reception intensity.
In addition, make electric wave each other with opposite phase when the 1st coil form bar antenna 16a and the 2nd coil form bar antenna 16b send simultaneously, can form the tilted communication zone of 90 degree of the communication zone that forms with respect to sending simultaneously with above-mentioned homophase.That is to say, electric wave is sent from the 1st coil form bar antenna 16a with the 1st, and make electric wave according to make above-mentioned the 1st phase reversal the 2nd phase of 180 degree (that is, with the 1st opposite phases) mutually send from the 2nd coil form bar antenna 16b.Through making electric wave, can fill up the 2nd zero signal zone 24b and the 3rd zero signal zone 24c each other with opposite phase formed communication zone Ed when the 1st coil form bar antenna 16a and the 2nd coil form bar antenna 16b send simultaneously.Magnetic field intensity is calculated portion 19 magnetic field intensity Hx is at this moment calculated as anti-phase resultant magnetic field intensity Hs.In addition, anti-phase resultant magnetic field intensity Hs is equivalent to the anti-phase electric wave reception intensity.
Then; As shown in Figure 8; For the magnetic field intensity difference Hab of homophase resultant magnetic field intensity Hk and anti-phase resultant magnetic field intensity Hs, among the 1st zero signal zone 24a and the 4th zero signal zone 24d, the value of homophase resultant magnetic field intensity Hk is set greatlyyer than anti-phase resultant magnetic field intensity Hs; In the 2nd zero signal zone 24b and the 3rd zero signal zone 24c, the value of anti-phase resultant magnetic field intensity Hs is set greatlyyer than homophase resultant magnetic field intensity Hk.Therefore, if homophase resultant magnetic field intensity Hk is bigger than anti-phase resultant magnetic field intensity Hs, electron key 2 is located in the 1st zero signal zone 24a or the 4th zero signal zone 24d.In addition, if anti-phase resultant magnetic field intensity Hs is bigger than homophase resultant magnetic field intensity Hk, electron key 2 is positioned at the 2nd zero signal zone 24b or the 3rd zero signal zone 24c.In addition; Under this routine situation; Be not which zero signal zone 24a～24d electron key 2 to be positioned at length judge, but through detected electrons key 2 have unmatchful send simultaneously to make replying only only whether electron key 2 is positioned at car and judges.
As shown in Figure 1; Verification ECU9 is provided with antenna and sends operating member 25 simultaneously; This antenna sends operating member 25 simultaneously in order to fill up the zero signal zone 24a～24d in the car, makes the 1st coil form bar antenna 16a and the 2nd coil form bar antenna 16b send electric wave simultaneously.Antenna sends operating member 25 simultaneously makes electric wave send simultaneously from the 1st coil form bar antenna 16a and the 2nd coil form bar antenna 16b with same phase.Then, antenna sends operating member 25 simultaneously and between coil form bar antenna 16a, 16b, makes phasing back 180 degree, and electric wave is sent from each coil form bar antenna 16a, 16b with opposite phase each other simultaneously.Antenna sends operating member 25 simultaneously in order in car, to form communication zone, carries out electric wave with weak transmission intensity VLow and sends.In addition, antenna sends operating member 25 simultaneously and is equivalent to sending part simultaneously.
Magnetic field intensity is calculated the magnetic field intensity Hx of portion 19 when homophase is sent simultaneously and is calculated as homophase resultant magnetic field intensity Hk.Then, in the process of intelligence communication, magnetic field intensity notice portion 20 notifies this homophase resultant magnetic field intensity Hk to vehicle 1.In addition, magnetic field intensity is calculated the magnetic field intensity of portion 19 when anti-phase is sent simultaneously and is calculated as anti-phase resultant magnetic field intensity Hs.Then, in the process that intelligence communication is carried out, magnetic field intensity notice portion 20 notifies said anti-phase resultant magnetic field intensity Hs to vehicle 1.
Position judgment portion 22 obtains portion 21 through magnetic field intensity and obtains homophase resultant magnetic field intensity Hk and anti-phase resultant magnetic field intensity Hs, and calculate each magnetic field intensity Hk, Hs poor, be magnetic field intensity difference Hab, judge key position.At this, homophase resultant magnetic field intensity Hk than the big situation of anti-phase resultant magnetic field intensity Hs under, position judgment portion 22 can think that electron key 2 is positioned at the homophase close limit and judges regional Kk, is car.In addition, anti-phase resultant magnetic field intensity Hs than the big situation of homophase resultant magnetic field intensity Hk under, position judgment portion 22 can think that electron key 2 is positioned at the anti-phase close limit and judges regional Ks, is car.
As shown in Figure 9, the 1st coil form bar antenna 16a is provided with coil 26, capacitor 27 and the 1st day line drive circuit 28.Coil 26 and capacitor 27 are formed as the series resonant circuit of the 1st coil form bar antenna 16a, and are driven by the 1st day line drive circuit 28.In addition, the 2nd coil form bar antenna 16b is provided with coil 29, capacitor 30 and the 2nd day line drive circuit 31.Coil 29 and capacitor 30 are formed as the series resonant circuit of the 2nd coil form bar antenna 16b, and are driven by the 2nd day line drive circuit 31.
In addition, verification ECU9 is provided with and sends wave generator circuit 32, and this transmission wave generator circuit 32 will send data D and be supplied to vehicle transmitter 10.Send wave generator circuit 32 and be connected with the 1st coil form bar antenna 16a, and be connected with the 2nd coil form bar antenna 16b through circuit for reversing 34 and the 2nd switch 35 through the 1st switch 33.Circuit for reversing 34 is provided with the inverter 36 of phase of input signals counter-rotating and the 3rd switch 37 that is made up of the single circuit double contact switch.The 3rd switch 37 determines the 2nd coil form bar antenna 16b directly is connected with transmission wave generator circuit 32, perhaps the 2nd coil form bar antenna 16b is connected with transmission wave generator circuit 32 through inverter 36.
From the 1st coil form bar antenna 16a transmission electric wave the time, the 1st switch 33 is switched on, the 2nd switch 35 is disconnected and the 3rd switch 37 is connected on the 1st contact 37a.Thus, come from the transmission data D that sends wave generator circuit 32 and only pass among the 1st coil form bar antenna 16a, and only send electric wave from the 1st coil form bar antenna 16a.In addition, from the 2nd coil form bar antenna 16b transmission electric wave the time, the 1st switch 33 is disconnected, the 2nd switch 35 is switched on and the 3rd switch 37 is connected on the 1st contact 37a.Thus, coming from the transmission data D that sends wave generator circuit 32 only passes among the 2nd coil form bar antenna 16b and only sends electric wave from the 2nd coil form bar antenna 16b.
Make electric wave with same phase when the 1st coil form bar antenna 16a and the 2nd coil form bar antenna 16b send simultaneously, the 1st switch 33 and the 2nd switch 35 all are switched on, and the 3rd switch 37 is connected on the 1st contact 37a.Thus, come from the transmission data D that sends wave generator circuit 32 and can pass among the 1st coil form bar antenna 16a and the 2nd coil form bar antenna 16b, and send electric wave simultaneously from each coil form bar antenna 16a, 16b with same phase.
Make electric wave each other with opposite phase when the 1st coil form bar antenna 16a and the 2nd coil form bar antenna 16b send simultaneously, the 1st switch 33 and the 2nd switch 35 all are switched on, and the 3rd switch 37 is connected on the 2nd contact 37b.Therefore, the 2nd coil form bar antenna 16b is connected with transmission wave generator circuit 32 through inverter 36.So, directly being supplied among the 1st coil form bar antenna 16a though come from the transmission data D that sends wave generator circuit 32, the transmission data D that phase place is inverted 180 degree can be supplied among the 2nd coil form bar antenna 16b.Therefore, send electric wave with opposite phase simultaneously from the 1st coil form bar antenna 16a and the 2nd coil form bar antenna 16b each other.
Then, with reference to Figure 10, the action of this routine position judgment device 15 is explained.
When vehicle 1 was in dead ship condition (car door locking and engine stop), the 1st antenna sent operating member 18 individually and switches to starting state for the electron key 2 that will be in holding state and send wake-up signal 38 discontinuously from vehicle transmitter 10 and carry out verification outside the car.At this moment, the 1st antenna sends operating member 18 individually and sends the 1st wake-up signal 38a through the 1st coil form bar antenna 16a, then sends the 2nd wake-up signal 38b through the 2nd coil form bar antenna 16b, and carries out repeatedly and should alternately send.In addition, the 1st antenna sends operating member 18 individually and carries out the transmission action with strong transmission intensity VHi, so that outside car, also form the communication zone of vehicle transmitter 10 (wake-up signal 38).
At this, suppose that electron key 2 enters into the communication zone Eb that is formed with strong transmission intensity VHi by vehicle transmitter 10, electron key 2 has received the 1st wake-up signal 38a.Electron key 2 one receives the 1st wake-up signal 38a, just gets into starting state through the 1st wake-up signal 38a.At this moment, magnetic field intensity is calculated portion 19 and is calculated the receiving intensity of the 1st wake-up signal 38a, i.e. the 1st magnetic field intensity Ha.In addition, electron key 2 one switches to starting state, just the 1st confirmation signal 39 is sent back to vehicle 1.
Confirm to reply if verification ECU9 after having sent the 1st wake-up signal 38a, receives in binding hours, will discern electron key 2 and be positioned at vehicle periphery.In addition; The 1st antenna sends the affirmation of operating member 18 1 receptions the 1st wake-up signal 38a individually and replys; Just stop to come from the transmission that wakes up of the 2nd coil form bar antenna 16b, and use the 1st coil form bar antenna 16a to proceed the intelligence communication after confirmation of receipt.
Verification ECU9 one identification electron key 2 is positioned at vehicle periphery, just sends vehicle ID40 through the 1st coil form bar antenna 16a.Vehicle ID40 is the intrinsic ID of vehicle 1.Whether electron key 2 one receives vehicle ID40 will carry out vehicle ID verification, and be that regular communication object is confirmed to the vehicle 1 as at this moment communication object.Electron key 2 one is confirmed vehicle ID verification establishment, just the 2nd confirmation signal 41 is sent to vehicle 1.
If receive the 2nd confirmation signal 41 in the binding hours of verification ECU9 after sending vehicle ID40, will continue to send inquiry 42 through the 1st coil form bar antenna 16a.Inquiry 42 comprises and is used to inquire that electron key 2 is the key number of which login key, the inquiry code that the challenge response authentication is used.Electron key 2 uses the key number of addressing inquires in 42 to carry out the number verification once receiving inquiry 42, when confirming number verification establishment, the cryptographic key of addressing inquires to code substitution self is come response code is calculated.Electron key 2 one is accomplished the calculating of response code, just will respond 43 and be sent to vehicle 1.Response 43 comprises the ID code of electron key 2 and the response code that has calculated.Electron key 2 one is accomplished the transmission of response 43, will get back to original holding state.
In addition, will respond 43 when being sent to vehicle 1 at electron key 2, magnetic field intensity notice portion 20 makes response 43 comprise the data of ID code, response code and the 1st magnetic field intensity Ha and should respond 43 transmissions.That is to say that ID code, response code and the 1st magnetic field intensity Ha are sent to vehicle 1 as response 43 from electron key 2.
Verification ECU9 is sending inquiry 42 o'clock, and the cryptographic key that himself also will address inquires to code substitution self comes response code is calculated.Then, verification ECU9 one receives response 43 from electron key 2, will carry out response check through responding response code contained in 43, sets up if confirm said response check, will carry out the ID code check through responding ID code contained in 43.All set up if confirm two verifications, verification ECU9 just thinks that intelligent checking sets up.
Further, when confirming that intelligent checking is set up, magnetic field intensity obtains portion 21 and obtains the 1st contained magnetic field intensity Ha in the response 43, and exports the 1st magnetic field intensity Ha to position judgment portion 22.That is to say that magnetic field intensity obtains portion 21 after the 1st coil form bar antenna 16a that makes electric wave from vehicle 1 sends, and will import as the 1st magnetic field intensity Ha from the magnetic field intensity Hx that electron key 2 is obtained.
The 1st antenna sends operating member 18 individually when the intelligent checking that completion use the 1st wake-up signal 38a carries out; This begins to send the 2nd wake-up signal 38b through the 2nd coil form bar antenna 16b, and uses the 2nd coil form bar antenna 16b and electron key 2 to carry out intelligence communication.Electron key 2 one receives the 2nd wake-up signal 38b, just gets into starting state through the 2nd wake-up signal 38b.At this moment, magnetic field intensity is calculated portion 19 and is calculated the receiving intensity of the 2nd wake-up signal 38b, i.e. the 2nd magnetic field intensity Hb.
In addition, electron key 2 just is sent to vehicle 1 with the 3rd confirmation signal 44 getting into starting state through the 2nd wake-up signal 38b one.Confirmation of receipt is replied in the binding hours of verification ECU9 after the 2nd wake-up signal 38b is sent, and will proceed the intelligence communication as the vehicle transmitting antenna with the 2nd coil form bar antenna 16b.
The communication sequence of following intelligence communication is identical with the intelligence communication of having used the 1st coil form bar antenna 16a to carry out.That is, the 3rd confirmation signal 44 1 sends to vehicle 1, is just sent vehicle ID45, is carried out vehicle ID verification by the 2nd coil form bar antenna 16b.Then, will be sent to vehicle 1 as the 4th confirmation signal 46 1 of vehicle verification Notice on Setting up, and just send and address inquires to 47 by the 2nd coil form bar antenna 16b by electron key 2.
Electron key 2 one receives addresses inquires to 47, calculates with regard to carry out key number verification and response code with said inquiry 47.Electron key 2 one is accomplished response code and is calculated, and just will respond 48 and be sent to vehicle 1.Said response 48 comprises the ID code of electron key 2, the response code of process calculating and the data of the 2nd magnetic field intensity Hb.
Verification ECU9 carries out response authentication and ID code check once receiving response 48, if these two verifications are set up, just thinks the intelligent checking establishment.In addition, set up if confirm intelligent checking, magnetic field intensity obtains portion 21 and just from said response 48, obtains the 2nd magnetic field intensity Hb, and exports the 2nd magnetic field intensity Hb to position judgment portion 22.That is to say that magnetic field intensity obtains portion 21 after the 2nd coil form bar antenna 16b that makes electric wave from vehicle 1 sends, and will import as the 2nd magnetic field intensity Hb from the magnetic field intensity Hx that electron key 2 is obtained.
If position judgment portion 22 obtains the 1st magnetic field intensity Ha and the 2nd magnetic field intensity Hb, will calculate poor (that is the magnetic field intensity difference Hab) of each magnetic field intensity Ha, Hb.At this moment; For the influence that reduces actual vehicle (for example; The vehicle body shape of vehicle 1, the shape at seat or position etc.); Magnetic field intensity difference Hab is through after multiply by the 1st magnetic field intensity Ha alpha and the 2nd magnetic field intensity Hb multiply by factor beta, deducts the 2nd magnetic field intensity Hb and draws from the 1st magnetic field intensity Ha again.That is to say that magnetic field intensity difference Hab calculates through calculating formula " α * Ha-β * Hb " in position judgment portion 22.
Then, whether position judgment portion 22 is the value bigger than threshold value Hr, is whether Hab＞Hr sets up through confirming magnetic field intensity difference Hab, come the position of electron key 2 is judged.Threshold value Hr is used to judge that electron key 2 is positioned at the car still judgment value of car outward, sets the line of demarcation inside and outside the car through adjusting this threshold value Hr.At this, because the 2nd magnetic field intensity Hb is bigger than the 1st magnetic field intensity Ha when electron key 2 is positioned at outside the car, so final magnetic field intensity difference Hab is below the threshold value Hr.Therefore, if the invalid words of Hab＞Hr, position judgment portion 22 will discern electron key 2 and be positioned at car outer (the 2nd wide region is judged regional Kb1).Then, position judgment portion 22 thinks that the outer verification of car sets up, and allows the release to car door.In addition, if HAb＞Hr sets up, position judgment portion 22 will think that the outer verification of car is false, and does not allow the release to car door.
If verification ECU9 detects the driver through for example gate controlled switch etc. and gets on the bus, will carry out verification in the cars with the electron key 2 that enters in the car.At this moment, the 1st antenna sends operating member 18 individually and makes 10 actions of vehicle transmitter, beginning intelligence communication with strong transmission intensity VHi.Yet in car, the magnetic field intensity of the 1st coil form bar antenna 16a is bigger than the magnetic field intensity of the 2nd coil form bar antenna 16b.Therefore, if magnetic field intensity difference Hab for the value bigger than threshold value Hr, be that Hab＞Hr sets up, position judgment portion 22 will judge that electron key 2 is positioned at car (the 1st wide region is judged regional Ka1).Then, position judgment portion 22 can think that verification is set up in the car, and allow to carry out power source conversion operation and engine start operation through tail-off 4 when confirming that electron key 2 is positioned at car.
At this moment, when hypothesis electron key 2 is positioned on the overall width direction of car,, can't judge that sometimes electron key 2 is positioned at car still car outward though send under the intensity VHi intelligence communication meeting and set up strong.In addition, when hypothesis electron key 2 was positioned at zero signal zone 24a～24d, the electric wave that sends out from vehicle transmitter 10 can't arrive electron key 2, thereby intelligence communication is false.Therefore, when vehicle transmitter 10 has been carried out the electric wave transmission with strong transmission intensity VHi, be positioned at electron key 2 under the situation of above-mentioned position, can can't judge the position of electron key 2.
At this, the 2nd antenna sends operating member 23 individually and makes 10 actions of vehicle transmitter with weak transmission intensity VLow, carries out and the identical intelligence communication of carrying out with strong transmission intensity VHi of intelligence communication.Then, when said intelligence communication, reply and confirm that intelligent checking sets up, will discern electron key 2 and be positioned at car (the 1st close limit judge that regional Ka2, the 2nd close limit judge regional Kb2) if position judgment portion 22 obtains from electron key 2.In addition, the 1st magnetic field intensity Ha that obtains and the magnetic field intensity difference Hab of the 2nd magnetic field intensity Hb this moment can also calculate in position judgment portion 22, and at length the position of electron key 2 is confirmed.
In addition; Even carry out intelligence communications and also can't detect under the situation of electron key 2 sending operating member 23 individually through the 2nd antenna; Antenna sends operating member 25 simultaneously makes electric wave send simultaneously from the 1st coil form bar antenna 16a and the 2nd coil form bar antenna 16b by weak transmission intensity VLow with same phase and opposite phase respectively, carries out the intelligence communication identical with above-mentioned order.Then, when said intelligence communication, reply and confirm that intelligent checking sets up, will discern electron key 2 and be positioned at car (homophase close limit judge that regional Kk, anti-phase close limit judge regional Ks) if position judgment portion 22 obtains from electron key 2.In addition, the 1st magnetic field intensity Ha that obtains and the magnetic field intensity difference Hab of the 2nd magnetic field intensity Hb this moment can also calculate in position judgment portion 22, and at length the position of electron key 2 is confirmed.
Further, when vehicle 1 is got off,, the lock-down button (diagram slightly) of the outer door handle of car is pressed operation the driver for locking is in the car door of released state.Verification ECU9 carries out verification in the above-mentioned car when the operation that detects said lock-down button, confirm whether electron key 2 is forgotten in car.At this moment, be positioned at car, will notify driver's electron key 2 to forget in car through vehicle buzzer etc. being piped, or lighting the alarm lamp etc. of instrument if confirm electron key 2.
If verification ECU9 confirms electron key 2 and does not forget in car, carry out the outer verification of above-mentioned car equally, confirm to be positioned at whether the outer electron key 2 of car is key.Outer verification is set up if verification ECU9 confirms car, just the car door locking is required to export to car door locking device 6, and through car door locking device 6 locking car doors.In addition, outer verification is set up if verification ECU9 can't confirm car, even lock-down button is pressed operation, also can the car door locking not required to export car door locking device 6 to, thereby not carry out the locking action to car door.
Therefore; Under this routine situation; Vehicle transmitter 10 is made as 2 one body antennas; Make the 1st coil form bar antenna 16a and the 2nd coil form bar antenna 16b of 2 one body antennas individually send electric wave respectively, and judge the position of electron key 2 according to the magnetic field intensity difference Hab of each coil form bar antenna 16a, 16b.Therefore, because the vehicle transmitting antenna of intelligence communication institute palpus just can accomplish through 12 body antenna, so can it tailed off the suppressing antenna sum.In addition, owing to judge the position of electron key 2,, can judge the position of electron key 2 more accurately so come from replying of electron key 2 and judge that the situation of key position compares with for example just detecting to have or not according to magnetic field intensity difference Hab.
Based on the formation of this execution mode, can obtain the effect of the following stated.
(1) vehicle transmitter 10 is made as 2 one body antennas; Make the 1st coil form bar antenna 16a and the 2nd coil form bar antenna 16b of 2 one body antennas send electric wave individually respectively; Magnetic field intensity Ha when having received the electric wave that comes from the 1st coil form bar antenna 16a at electron key 2 and the magnetic field intensity difference Hab of the magnetic field intensity Hb when electron key 2 has received the electric wave that comes from the 2nd coil form bar antenna 16b calculate, and judge the position of electron key 2 according to this magnetic field intensity difference Hab.Therefore, can come the position of electron key 2 is detected, can also judge the position of electron key 2 more accurately through 1 antenna element.
(2) in car during verification; Owing to the 1st coil form bar antenna 16a and the 2nd coil form bar antenna 16b being sent simultaneously and key position being judged; Even, also can these zones be filled up as communication zone so in car, there is zero signal zone 24a～24d.Therefore,, also can detect, so can judge the position of electron key 2 more accurately to electron key 2 even electron key 2 is positioned at zero signal zone 24a～24d.
(3) make electric wave send simultaneously and obtain homophase resultant magnetic field intensity Hk and make electric wave send simultaneously and obtain anti-phase resultant magnetic field intensity Hs from coil form bar antenna 16a, 16b with opposite phase each other, and judge key position from coil form bar antenna 16a, 16b according to the magnetic field intensity difference Hab of each magnetic field intensity Hk, Hs with same phase.Therefore, owing to can further carrying out sectionalization and detecting, so can judge the position of electron key 2 more accurately to the position of electron key 2.
(4) when judging whether electron key 2 is positioned at car; Through weakening the transmission intensity of the 1st coil form bar antenna 16a and the 2nd coil form bar antenna 16b; Form judgement zone Ka2, the Kb2 of zonule thus on apparent, judge whether electron key 2 is positioned at car.Therefore, the situation that is merely a kind with the size of judging regional Ka, Kb is compared, owing to can and will judge whether be positioned at car so can judge electron key 2 more accurately to the key position sectionalization in the car.
(5) when relatively magnetic field intensity difference Hab and threshold value Hr big or small, each magnetic field intensity Ha, Hb multiply by alpha, the laggard line position judgement of β.Therefore; Owing to can suitably adjust to the size of the zone of the judgement on apparent Ka, Kb; Even, also can offset with this and spill corresponding amount so the communication zone of the 1st coil form bar antenna 16a or the 2nd coil form bar antenna 16b spills to beyond thought zone.
(the 2nd execution mode)
Then, with reference to Figure 11 and Figure 12, the 2nd execution mode is explained.In addition, in this example, through a plurality of vehicle transmitters 10 (2 one body antennas) are carried on vehicle 1, can be to the position segmentation and the detection of electron key 2.Therefore, the part identical with the 1st execution mode enclosed prosign omit explanation, only different portions is elaborated.
Shown in figure 11, be equipped with the 1st vehicle transmitter 10a at body forward structure and on the middle position of overall width direction.The 1st vehicle transmitter 10a tilts 45 degree (+45 degree) with coil axis L1 (L2) with respect to for example vehicle fore-and-aft direction and is configured.So, judge that regional Ka, Ka, Kb, Kb form with the direction of 45 degree that tilt with respect to the vehicle fore-and-aft direction for 4 of the 1st vehicle transmitter 10a.In addition, under this routine situation, in 4 regional Ka of judgement, Ka, Kb, Kb, a pair of combination is made as the anterior the 1st judges regional Kc1, Kc1, and another also is made as the regional Kd1 of anterior the 2nd judgement, Kd1 to combination.
In addition, be equipped with the 2nd vehicle transmitter 10b at body tail and on the middle position of overall width direction.The same with the 1st vehicle transmitter 10a, the 2nd vehicle transmitter 10b also tilts 45 degree (45 degree) with coil axis L1 (L2) with respect to for example vehicle fore-and-aft direction and is configured.In addition, under this routine situation, judge among regional Ka, Ka, Kb, the Kb, a pair of combination is made as rear portion the 1st judges regional Kc2, Kc2, and another also is made as rear portion the 2nd to combination judges regional Kd2, Kd2 at 4 of the 2nd vehicle transmitter 10b.In addition, the 1st vehicle transmitter 10a and the 2nd vehicle transmitter 10b are along vehicle fore-and-aft direction alignment arrangements.
Yet, as shown in Figure 4, for 1 vehicle transmitter 10, each other the opposed the 1st judging in regional Ka, the Ka, because the judged result of magnetic field intensity difference Hab is identical, so can't judge that finally electron key 2 is arranged in each and judges which of regional Ka, Ka.The 2nd judges that regional Kb, Kb also same problem can occur.
Yet; As this example; Prepare 2 vehicle transmitter 10a, 10b; If make the front portion the 1st of the 1st vehicle transmitter 10a judge that the rear portion the 1st with the 2nd vehicle transmitter 10b of regional Kc1, Kc1 judges that regional Kc2, Kc2 one is overlapping, just can distinguish the anterior the 1st and judge 2 zones of regional Kc1, Kc1 and can also further distinguish 2 zones of the regional Kc2 of rear portion the 1st judgement, Kc2.In addition; Equally; Judge that regional Kd1, Kd1 one with the regional Kd2 of rear portion the 2nd judgement of the 2nd vehicle transmitter 10b, Kd2 one is overlapping if make the front portion the 2nd of the 1st vehicle transmitter 10a; Just can distinguish the anterior the 2nd and judge 2 zones of regional Kd1, Kd1, and can also further distinguish 2 zones that regional Kd2, Kd2 are judged in rear portion the 2nd.At this; The repeat region of the front portion the 1st of the 1st vehicle transmitter 10a being judged the regional Kc2 of rear portion the 1st judgement of regional Kc1 and the 2nd vehicle transmitter 10b is made as the 1st repeat region Kz1, and the front portion the 2nd of the 1st vehicle transmitter 10a is judged that the repeat region of the regional Kd2 of rear portion the 2nd judgement of regional Kd1 and the 2nd vehicle transmitter 10b is made as the 2nd repeat region Kz2.
Therefore; Under this routine situation; The judged result of the magnetic field intensity difference Hab that position judgment portion 22 obtains when carrying out intelligence communication with the judged result of the magnetic field intensity difference Hab that when carrying out intelligence communication, obtained by the 1st vehicle transmitter 10a with by the 2nd vehicle transmitter 10b is the basis, judges the position of electron key 2.That is to say; The position of electron key 2 is judged in the combination of the judged result of judged result and the magnetic field intensity difference Hab when having used 2nd vehicle transmitter 10b of position judgment portion 22 through the magnetic field intensity difference Hab when having used the 1st vehicle transmitter 10a.
For example; If the magnetic field intensity difference Hab when having used the 1st vehicle transmitter 10a is bigger and when having used the 2nd vehicle transmitter 10b, can't carry out intelligence communication than threshold value Hr, will judge that electron key 2 is positioned at vehicle body right tiltedly anterior (the anterior the 1st judges regional Kc1).If the magnetic field intensity difference Hab when having used the 1st vehicle transmitter 10a is littler and when having used the 2nd vehicle transmitter 10b, can't carry out intelligence communication than threshold value Hr, will judge that electron key 2 is positioned at a vehicle body left side tiltedly anterior (the anterior the 2nd judges regional Kd1).In addition; If when having used the 1st vehicle transmitter 10a, can't carry out intelligence communication and the magnetic field intensity difference Hab when having used the 2nd vehicle transmitter 10b is bigger than threshold value Hr, will judge that electron key 2 is positioned at the right tiltedly rear portion of vehicle body (regional Kc2 is judged at rear portion the 1st).If when having used the 1st vehicle transmitter 10a, can't carry out intelligence communication and the magnetic field intensity difference Hab when having used the 2nd vehicle transmitter 10b is littler than threshold value Hr, will judge that electron key 2 is positioned at tiltedly rear portion, a car left side.
In addition, if the magnetic field intensity difference Hab when having used the 1st vehicle transmitter 10a and the 2nd vehicle transmitter 10b is all big than threshold value Hr, will judge that electron key 2 is positioned at vehicle body left side (the 1st repeat region Kz1).That is to say, judge that which of 2 regional Kc1 of judgement, Kc1 electron key 2 be arranged in.If the magnetic field intensity difference Hab when having used the 1st vehicle transmitter 10a and the 2nd vehicle transmitter 10b is all little than threshold value Hr, will judge that electron key 2 is positioned at vehicle body right side (the 2nd repeat region Kz2).That is to say, judge that which of 2 regional Kc2 of judgement, Kc2 electron key 2 be arranged in.
Therefore; Under this routine situation; Be provided with 2 vehicle transmitter 10a, 10b as vehicle transmitter 10 and form repeat region Kz1, Kz2; Under this configuration status,, judge the position of electron key 2 according to the combination of magnetic field intensity difference Hab from the 1st vehicle transmitter 10a transmission electric wave time the and the magnetic field intensity difference Hab from the 2nd vehicle transmitter 10b transmission electric wave the time.Therefore, owing to can the regional Ka of a pair of judgement, the Ka (Kb, Kb) of each vehicle transmitter 10a, 10b be judged as different zones, judge which of regional Ka, Ka (Kb, Kb) so can detected electrons key 2 be arranged in.Therefore, owing to can further carrying out sectionalization and detecting, so can judge the position of electron key 2 more accurately to the position of electron key 2.
In addition, the allocation position of the 1st vehicle transmitter 10a and the 2nd vehicle transmitter 10b is not limited to along vehicle fore-and-aft direction alignment arrangements.For example shown in Figure 12, also can the 1st vehicle transmitter 10a and the 2nd vehicle transmitter 10b be judged the position of electron key 2 along the configuration arranged side by side of overall width direction.In this case, can judge that which of 8 zones such as the outer the place ahead of driver's seat sidecar, the outer rear of driver's seat sidecar, the outer the place ahead of co-pilot seat sidecar, the outer rear of co-pilot seat sidecar, car the place ahead, car rear electron key 2 be arranged in.
Based on the formation of this execution mode, except the effect that can obtain the 1st execution mode described (1)～(5), can also obtain following effect.
(6) form repeat region Kz1, Kz2 owing to being provided with a plurality of vehicle transmitters 10; And judge the position of electron key 2, so can further carry out sectionalization and judge the position of electron key 2 according to the magnetic field intensity difference Hab when sending electric wave with in the combination of the magnetic field intensity difference Hab when the 2nd vehicle transmitter 10b sends electric wave from the 1st vehicle transmitter 10a.
(the 3rd execution mode)
Then, with reference to Figure 13～Figure 15 the 3rd execution mode is explained.In addition, this example is for being applied in the technical characterictic of the 2nd execution mode the embodiment of tire pressure monitoring system 50, and this example is also only to explaining with said execution mode different portions.
Shown in figure 13, on vehicle 1, be equipped with tire pressure monitoring system 50, this tire pressure monitoring system 50 uses the electron tube (tire sensor) 52 that is installed in the last wireless type of each tire 51a～51e that each tire pressure is monitored.Tire pressure monitoring system 50 1 detects the tire that tire pressure is lower than threshold value, just through panel board in the car for example etc. the information of this tire is notified to the driver.Tire 51a～51e comprises right front fire 51a, left front tire 51b, right rear fire 51c, left rear tire 51d, spare tyre 51e.In addition, tire pressure monitoring system 50 constitutes wireless system.
Be installed in the last electron tube 52 of each tire 51a～51e and possess the function that to send tire air pressure information Stp through wireless mode.On this routine electron tube 52, be equipped with the LF receiver that can accept the LF electric wave, the UHF receiver that can send the UHF electric wave, detection wheel air pressure pressure sensor, detect the temperature sensor of tyre temperature, acceleration transducer that the acceleration that is applied on the tire is detected and to the microcomputer controlled with upper-part etc.In addition, on the microcomputer of each electron tube 52, also be provided with above-mentioned magnetic field intensity and calculate portion 19 and magnetic field intensity notice portion 20.In addition, in this example, electron tube 52 constitutes communication terminal and tire communicator.
Electron tube 52 sends tire air pressure information Stp when vehicle transmitter 10 has received triggering signal Str through the UHF electric wave.Tire air pressure information Stp comprises electron tube for example intrinsic identification id, tire pressure, tyre temperature, is applied to the information such as acceleration on the tire.In addition, triggering signal Str is the LF electric wave, and it comprises the action implementation requirement that requirement electron tube 52 sends electric wave.Vehicle transmitter 10 does not send triggering signal Str with the regulation time point that electron key 2 communicates during vehicle '.
On vehicle 1 and at 2 positions, front and back of vehicle body, dispose vehicle transmitter 10 (2 one body antennas) with direction with respect to vehicle heading (vehicle body fore-and-aft direction) inclination 45 degree.Under this routine situation, the antenna of front side is made as 10a, and the antenna of rear side is made as 10b.In addition, between vehicle transmitter 10a, 10b, through making overlapping repeat region Kz1, the Kz2 of forming of communication zone separately.Under this routine situation; In the regional Ka of a pair of judgement of vehicle transmitter 10a, Ka; Judgement zone Kc11 covering right front tyre 51a through vehicle body right front portion side; And in the regional Kb of a pair of judgement of vehicle transmitter 10a, Kb, the judgement zone Kd11 through vehicle body left forward side covers left front tire 51b.In addition, through repeat region Kz2 covering right rear tyre 51c, cover left rear tire 51d through repeat region Kz1.Further, any through the regional Kc22 of the judgement of vehicle transmitter 10b, Kd22 covers spare tyre 51e.
Then, the action to this routine tire pressure monitoring system 50 describes.
Verification ECU9 sends triggering signal Str from vehicle transmitter 10a, 10b when confirming the air pressure of each tire 51a～51e.During vehicle 1 goes not to electron key 2 inquire during the transmission of toggle signal Str discontinuously of regulation time point.In addition, the scope of the communication zone of triggering signal Str same degree when communicating with vehicle transmitter 10a, 10b and electron key 2 forms.
At this moment, at first the 1st vehicle transmitter 10a forms the judgement zone Ka of triggering signal Str, then forms the judgement zone Kb of triggering signal Str.Then, the 2nd vehicle transmitter 10b forms the judgement zone Ka of triggering signal Str, then forms the judgement zone Kb of triggering signal Str.
The electron tube 52 of each tire 51a～51e is calculated the magnetic field intensity (receiving signal strength signal intensity RSSI) that triggering signal Str calculates in portion 19 through magnetic field intensity when having received from triggering signal Str that each vehicle transmitter 10a, 10b send out.The electron tube 52 1 of each tire 51a～51e receives triggering signal Str, just this triggering signal Str is made and replys and tire air pressure information Stp is sent to vehicle body, also is included in the data of magnetic field intensity among this tire air pressure information Stp and sends this information.
Verification ECU9 receives these tire air pressure information Stp through vehicle tuner 11 1; Will carry out verification through identification id contained among the tire air pressure information Stp; If this verification is set up, verification ECU9 will obtain tire pressure contained among the said tire air pressure information Stp, tyre temperature and tire acceleration etc.Then, verification ECU9 is stored in tire pressure, tyre temperature and tire acceleration etc. contained among identification id and the said tire air pressure information Stp in the memory of self after corresponding.
In addition; Position judgment portion 22 is the basis with the judged result of the magnetic field intensity difference Hab that when sending triggering signal Str from the 1st vehicle transmitter 10a, obtains with in the judged result of the magnetic field intensity difference Hab that when the 2nd vehicle transmitter 10b sends triggering signal Str, obtains, judges the position of tire 51a～51e.That is to say; Position judgment portion 22 confirms the position of tire 51a～51e according to the combination of the judged result of the judged result of the magnetic field intensity difference Hab when having used the 1st vehicle transmitter 10a and the magnetic field intensity difference Hab when having used the 2nd vehicle transmitter 10b.
For example, if the magnetic field intensity difference Hab when having used the 1st vehicle transmitter 10a than threshold value Hr the big and invalid words of when having used the 2nd vehicle transmitter 10b, communicating by letter, will judge that this identification id is the identification id of right front fire 51a (judging regional Kc 11).In addition, if the magnetic field intensity difference Hab when having used the 1st vehicle transmitter 10a than threshold value Hr the little and invalid words of when having used the 2nd vehicle transmitter 10b, communicating by letter, will judge that this identification id is the identification id of left front tire 51b (judging regional Kd11).Further, if the magnetic field intensity difference Hab when having used the 1st vehicle transmitter 10a and the 2nd vehicle transmitter 10b is all big than threshold value Hr, will judge that this identification id is the identification id of left rear tire 51d (the 1st repeat region Kz1).In addition, if all big, will judge that this identification id is the identification id of right rear fire 51c (the 2nd repeat region Kz2) than threshold value Hr at the magnetic field intensity difference Hab that has used the 1st vehicle transmitter 10a and the 2nd vehicle transmitter 10b.
Further, have only the communication of the 2nd vehicle transmitter 10b to set up if the communication of the 1st vehicle transmitter 10a is false, will judge that this identification id is the identification id of spare tyre 51e (judging regional Kc22, Kd22).In addition, form the communication zone that only luggage case is covered, carry out the position of spare tyre 51e thus and confirm through the for example phase place of each antenna of the 2nd vehicle transmitter 10b (2 one body antennas) is controlled.
In addition, shown in figure 14, also can vehicle transmitter 10a, 10b be configured on the left and right directions of vehicle.In this case, outside Che Nei and car, can confirm the front and back of vehicle 1.In the example of Figure 14, through the position at rear portion in the car being confirmed judge the position of spare tyre 51e (diagram slightly).Further, also can use the technical characterictic of the 1st execution mode, form with being combined to the synthetic communication zone of communication zone and anti-phase and fill up zero signal zone.
Further, shown in figure 15, also can only come the position of tire 51a～51e is confirmed through 1 vehicle transmitter 10.This situation is configured after can the position of vehicle transmitter 10 being moved forward or backward again.Thus, the electric field strength of electron tube 52 when any antenna from each antenna of 2 one body antennas has received triggering signal Str is bigger in the electric field strength when another antenna has received triggering signal Str than this electron tube 52.Therefore, can confirm the position of tire 51a～51e through the comparative result of magnetic field intensity and the size of electric field strength.In addition, can be through the phase place of 2 one body antennas being controlled, perhaps a side intensity is made as 2 times of positions of confirming spare tyre 51e of the opposing party.
Yet, on each tire room, dispose monitoring device, and confirm the electron tube 52 of action through monitoring device.In this case, because must be at the last monitoring device that disposes of each tire 51a～51e, so can cause the increase of number of components.Yet, in this example, even owing to do not use such monitoring device also can confirm tire location, so need monitoring device.Therefore, can suppress tire pressure monitoring system 50 required number of components tails off it.
Based on the formation of this execution mode, except the effect that can obtain (1)～(6) that above-mentioned execution mode puts down in writing, can also obtain following effect.
(7) can not confirm owing to monitoring device not being configured in each tire room yet, it tailed off so can suppress the number of components of 50 palpuses of tire pressure monitoring system to the position of tire 51a～51e.In addition, can also confirm tire accurately.
(8) since will exempt from the key operated system 3, be arranged on the vehicle body communications facility (mainly containing: verification ECU9, vehicle transmitter 10 and vehicle tuner 11 etc.) and tire pressure monitoring system 50 use jointly, so can reduce the number of components of lift-launch on vehicle 1.
In addition, execution mode is not limited to up to the present described formation, also can change to following mode.
In the 1st～the 3rd execution mode, multiaxis one body antenna is not limited in 2 one body antennas holding 2 coil form bar antenna 16a, 16b.For example also can for, 3 antenna elements are set and make these 3 antenna elements and 3 (X axle, Y axle, Z axle) corresponding antenna.
In the 1st～the 3rd execution mode, the coil form bar antenna 16a of 2 one body antennas, the coil axis L1 of 16b, L2 disposes towards mutually perpendicular direction.Be not limited in this, also can get vertical angle in addition.
In the 1st～the 3rd execution mode, calculate magnetic field intensity Hx through wake-up signal 38a, 38b.Be not limited in this, also can be through vehicle ID40 for example, 45 or address inquires to 42,47 and calculate magnetic field intensity Hx.
In the 1st～the 3rd execution mode, the antenna element of vehicle transmitter 10 is not limited in coil form bar antenna 16a, 16b, for example also can be loop aerial or dipole antenna.
In the 1st and the 2nd execution mode, the mode of judgement zone Ka, Kb size that changes vehicle transmitter 10 during key position inside and outside car is judged is only for carrying out switching way due to the transmission intensity to the electric wave that comes from vehicle transmitter 10 (coil form bar antenna 16a, 16b).Also can adopt following mode; For example the 2nd antenna sends the constant and threshold value Hr of change when the receiving intensity of electron key 2 is confirmed of transmission strength maintenance of the electric wave of operating member 23 (segmentation position judgment portion) through will coming from vehicle transmitter 10 (coil form bar antenna 16a, 16b) individually, changes the apparent size of judging regional Ka, Kb.In addition, this characteristic also can be applied to the 3rd execution mode.
In the 1st and the 2nd execution mode, the calculating of magnetic field intensity difference Hab is not limited to receive the data of magnetic field intensity Hx and the form of carrying out this calculating by vehicle 1 side through vehicle 1 from electron key 2.For example, also can be for the calculating of magnetic field intensity difference Hab all being undertaken by electron key 2 sides and being notified form to vehicle 1 with this result of calculation.In addition, this mode also can be applied to the 3rd execution mode.
In the 1st～the 3rd execution mode, receiving intensity is not limited to receive the magnetic field intensity Hx of electric wave, also can be electric field strength.
In the 1st～the 3rd execution mode, make coil form bar antenna 16a, when 16b sends simultaneously, must carry out homophase and send simultaneously with anti-phase and send simultaneously.Be not limited in this, also can only carry out homophase and send in sending simultaneously with anti-phase simultaneously.
In the 1st～the 3rd execution mode, require to return the letter requirement, promptly require signal Srq for ID.Be not limited in this, so long as the signal that requires electron key 2 to reply gets final product.
In the 1st～the 3rd execution mode, intelligent checking is not limited in 2 coil form bar antenna 16a, 16b both sides and all sets up as establishment condition, also can be merely any side.
In the 2nd or the 3rd execution mode, when a plurality of vehicle transmitter 10 was set, its number also can be for more than 3 not only for being decided to be 2.
In the 2nd or the 3rd execution mode, the judgement of the 1st vehicle transmitter 10a zone Ka, Kb can suitably change with the method for superposition of the regional Ka of the judgement of the 2nd vehicle transmitter 10b, Kb, and it is overlapping etc. for example to have only 1 zone to carry out.
In the 1st～the 3rd execution mode, electron key 2 is not limited to car key, also can use various terminals (mobile phone, IC-card etc.).In addition, electron key 2 not necessarily will have the key function, mainly comprises the communication terminal (authentication terminal) that broadly carries out acts of authentication.
In the 1st～the 3rd execution mode, in exempting from key operated system 3 or tire pressure monitoring system 50, different with multiple road medium frequency on the past road of intercommunication mutually.Be not limited in this, also can be identical frequency.In addition, the communication frequency of exempting from key operated system 3 and tire pressure monitoring system 50 is not limited in LF or UHF, for example also can use HF (High Frequency) to wait other frequency.
In the 1st～the 3rd execution mode, wireless system is not limited in example illustrated in the execution mode with inquiry, also can do suitable change according to the application's application scenario.
In the 1st～the 3rd execution mode, in the process of intelligence communication, send the electric wave of electron key 2, and electron key 2 is driven through this electric wave from vehicle 1, also can electron key 2 be made as the device of no battery.
In the 3rd execution mode, the content of tire air pressure information Stp can suitably be changed.
In the 3rd execution mode, verification ECU9 holds concurrently and is the control unit of tire pressure monitoring system 50.Be not limited in this, special-purpose ECU also can be set.
In the 1st～the 3rd execution mode, exempt from key operated system 3 and tire pressure monitoring system 50 common uses and be arranged on the communications facility on the vehicle body.Be not limited in this, each system also can independently operate.In addition, this routine technical characterictic is not limited in lift-launch on vehicle 1, also can be applied on other the machine or device.

Claims (10)

1. communication terminal position judgment device that goes for wireless system, the communication terminal that said wireless system comprises communication host and carries out two-way communication with this communication host,
It is characterized in that possessing: be connected multiaxis one body antenna on the said communication host, this multiaxis one body antenna comprises the 1st antenna element and the 2nd antenna element of the different direction configuration of axial court at least;
Indivedual implementation portions that send, it makes electric wave individually send from said the 1st antenna element and the 2nd antenna element when the ID verification;
Receiving intensity is obtained portion, and it obtains receiving intensity and the receiving intensity when said communication terminal has received the electric wave that comes from said the 2nd antenna element when said communication terminal has received the electric wave that comes from said the 1st antenna element;
Intensity difference is calculated portion, and it calculates the intensity difference of 2 said receiving intensities; With
Position judgment portion, it judges the position of said communication terminal through said intensity difference.
2. communication terminal position judgment device according to claim 1 is characterized in that,
Possess sending part simultaneously, it makes electric wave send simultaneously from said the 1st antenna element and said the 2nd antenna element,
Said receiving intensity is obtained the receiving intensity of portion when having received from said electric wave that said the 1st antenna element and the 2nd antenna element send out simultaneously at said communication terminal and is calculated, and said position judgment portion uses the said receiving intensity of obtaining when sending at the same time that the position of said communication terminal is judged.
3. according to claim 1 or 2 described communication terminal position judgment devices, it is characterized in that,
Possess segmentation position judgment portion, it passes through to change the position judgment unit of said communication terminal, promptly judges regional size, comes further sectionalization to be carried out in the position of said communication terminal and judge.
4. according to claim 1 or 2 described communication terminal position judgment devices, it is characterized in that,
Said multiaxis one body antenna is in the 1st multiaxis one body antenna and the 2nd multiaxis one body antenna that is connected on the said communication host,
Said the 1st multiaxis one body antenna and the 2nd multiaxis one antenna configurations do; Be formed in a pair of judgement zone of said the 1st multiaxis one body antenna both sides one with a pair of judgement zone that is formed at said the 2nd multiaxis one body antenna both sides in one overlap to form repeat region
The position of said communication terminal is judged according to the combination of said intensity difference that when using said the 1st multiaxis one antenna to form said repeat region, is obtained and the said intensity difference that when using said the 2nd multiaxis one antenna to form said repeat region, obtained by said position judgment portion.
5. according to claim 1 or 2 described communication terminal position judgment devices, it is characterized in that,
Said communication terminal is an electron key,
Said wireless system is an electron key system, between communication host described in this electron key system and said electron key, carries out the ID verification,
The position of said electron key is judged by said position judgment portion.
6. according to claim 1 or 2 described communication terminal position judgment devices, it is characterized in that,
Said communication terminal is the tire communicator, and it is installed on each tire of vehicle,
Said wireless system is a pneumatic pressure monitoring system of tire, obtains tire pressure through wireless mode from said tire communicator at communication host described in this pneumatic pressure monitoring system of tire,
Said position judgment portion confirms the position of tire through the position of judging said tire communicator.
7. according to claim 1 or 2 described communication terminal position judgment devices, it is characterized in that,
Said wireless system comprises: electron key system, carrying out the ID verification between communication host and the electron key described in this electron key system; And pneumatic pressure monitoring system of tire; Obtain tire pressure through wireless mode from the tire communicator at communication host described in this pneumatic pressure monitoring system of tire; Said electron key and said tire communicator have played the effect of said communication terminal separately, the said communication host of the common use of said electron key system and said pneumatic pressure monitoring system of tire.
8. communication terminal position judgment device according to claim 2 is characterized in that,
Said while sending part implementation homophase sends simultaneously with anti-phase and sends simultaneously; This homophase sends simultaneously electric wave is sent from said the 1st antenna element and the 2nd antenna element with same phase simultaneously; This anti-phase sends simultaneously electric wave is sent from said the 1st antenna element and the 2nd antenna element with opposite phase each other simultaneously
The said receiving intensity portion of obtaining the homophase electric wave reception intensity when said communication terminal has received the electric wave that comes from said the 1st antenna element and the 2nd antenna element when said homophase sends simultaneously and the anti-phase electric wave reception intensity when said communication terminal has received the electric wave that comes from said the 1st antenna element and the 2nd antenna element when said anti-phase sends simultaneously
The intensity difference that the said intensity difference portion of calculating at said homophase electric wave reception intensity and said anti-phase electric wave reception intensity,
The position of said communication terminal is judged by said position judgment portion according to the intensity difference of said homophase electric wave reception intensity and said anti-phase electric wave reception intensity.
9. communication terminal position judgment device according to claim 3 is characterized in that,
Said segmentation position judgment portion comes from the transmission intensity of the electric wave of said the 1st antenna element and the 2nd antenna element respectively through change, changes the said size of judging the zone.
10. communication terminal position judgment device according to claim 3 is characterized in that,
The position of said communication terminal is judged according to the comparison to said intensity difference and threshold value by said position judgment portion,
Said segmentation position judgment portion changes the said apparent size of judging the zone through changing said threshold value when the transmission strength maintenance of the electric wave that comes from said the 1st antenna element and the 2nd antenna element respectively is constant.
CN2011101728101A 2010-09-24 2011-06-16 Communication terminal position judging device Pending CN102420627A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2010-214426 2010-09-24
JP2010214426A JP2011147104A (en) 2009-12-18 2010-09-24 Communication terminal position determining apparatus

Publications (1)

Publication Number Publication Date
CN102420627A true CN102420627A (en) 2012-04-18

Family

ID=45952688

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2011101728101A Pending CN102420627A (en) 2010-09-24 2011-06-16 Communication terminal position judging device

Country Status (1)

Country Link
CN (1) CN102420627A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103448492A (en) * 2012-05-30 2013-12-18 株式会社东海理化电机制作所 Comprehensive receiver
CN103576123A (en) * 2012-08-08 2014-02-12 欧姆龙汽车电子株式会社 Portable-device position determination system, portable-device position determination method, and portable-device position determination apparatus
CN104539347A (en) * 2015-01-08 2015-04-22 中国科学技术大学苏州研究院 Vehicle relative position judgment method based on directional antennas
CN111108405A (en) * 2017-09-21 2020-05-05 株式会社自动网络技术研究所 Processing device, processing method, and computer program
CN113253213A (en) * 2021-04-07 2021-08-13 哈尔滨工业大学（威海） Method and system for measuring ionosphere echo space distribution characteristics of high-frequency ground wave radar
CN115402259A (en) * 2022-09-09 2022-11-29 浙江吉利控股集团有限公司 Control method, control device, automobile and storage medium
WO2023045128A1 (en) * 2021-09-24 2023-03-30 博泰车联网科技(上海)股份有限公司 Vehicle device control method, electronic device, and storage medium

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000255381A (en) * 1999-03-05 2000-09-19 Tokai Rika Co Ltd Antenna of vehicular remote control device
CN1527949A (en) * 2000-11-10 2004-09-08 �����ּ�����˾ System for monitoring tyres of a vehicle comprising a device automatically locating wheel transmitters
CN1541864A (en) * 2003-03-03 2004-11-03 欧姆龙株式会社 Vehicular remote control system
JP3668729B2 (en) * 2002-08-29 2005-07-06 三菱電機株式会社 In-vehicle device remote control system
CN1637788A (en) * 2003-12-25 2005-07-13 欧姆龙株式会社 Vehicular remote control system and tire pressure monitoring system
WO2008004459A1 (en) * 2006-07-06 2008-01-10 Calsonic Kansei Corporation Vehicle key-less device
CN101290688A (en) * 2007-04-19 2008-10-22 阿尔卑斯电气株式会社 Keyless entry system

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000255381A (en) * 1999-03-05 2000-09-19 Tokai Rika Co Ltd Antenna of vehicular remote control device
CN1527949A (en) * 2000-11-10 2004-09-08 �����ּ�����˾ System for monitoring tyres of a vehicle comprising a device automatically locating wheel transmitters
JP3668729B2 (en) * 2002-08-29 2005-07-06 三菱電機株式会社 In-vehicle device remote control system
CN1541864A (en) * 2003-03-03 2004-11-03 欧姆龙株式会社 Vehicular remote control system
CN1637788A (en) * 2003-12-25 2005-07-13 欧姆龙株式会社 Vehicular remote control system and tire pressure monitoring system
WO2008004459A1 (en) * 2006-07-06 2008-01-10 Calsonic Kansei Corporation Vehicle key-less device
CN101290688A (en) * 2007-04-19 2008-10-22 阿尔卑斯电气株式会社 Keyless entry system

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103448492A (en) * 2012-05-30 2013-12-18 株式会社东海理化电机制作所 Comprehensive receiver
CN103448492B (en) * 2012-05-30 2016-09-14 株式会社东海理化电机制作所 Comprehensive receiver
CN103576123A (en) * 2012-08-08 2014-02-12 欧姆龙汽车电子株式会社 Portable-device position determination system, portable-device position determination method, and portable-device position determination apparatus
CN103576123B (en) * 2012-08-08 2017-03-01 欧姆龙汽车电子株式会社 The location judging system of portable machine, position decision method and position determination means
CN104539347A (en) * 2015-01-08 2015-04-22 中国科学技术大学苏州研究院 Vehicle relative position judgment method based on directional antennas
CN111108405A (en) * 2017-09-21 2020-05-05 株式会社自动网络技术研究所 Processing device, processing method, and computer program
CN111108405B (en) * 2017-09-21 2023-07-25 株式会社自动网络技术研究所 Processing device, processing method, and recording medium
CN113253213A (en) * 2021-04-07 2021-08-13 哈尔滨工业大学（威海） Method and system for measuring ionosphere echo space distribution characteristics of high-frequency ground wave radar
CN113253213B (en) * 2021-04-07 2024-01-30 哈尔滨工业大学（威海） Method and system for measuring ionosphere echo spatial distribution characteristics of high-frequency ground wave radar
WO2023045128A1 (en) * 2021-09-24 2023-03-30 博泰车联网科技(上海)股份有限公司 Vehicle device control method, electronic device, and storage medium
CN115402259A (en) * 2022-09-09 2022-11-29 浙江吉利控股集团有限公司 Control method, control device, automobile and storage medium
CN115402259B (en) * 2022-09-09 2024-04-19 浙江吉利控股集团有限公司 Control method, control device, automobile and storage medium

Similar Documents

Publication Publication Date Title
CN102420627A (en) Communication terminal position judging device
US8400285B2 (en) Key locator for electronic key system
US11305732B2 (en) Vehicle access system
JP5095144B2 (en) Keyless device for vehicle
CN100354150C (en) Tire condition monitoring system
JP6314072B2 (en) Portable device, communication device, and communication system
US10737659B2 (en) Protocols for remote vehicle access systems
JP5684983B2 (en) Communication area forming device for electronic key system
US10172145B2 (en) Phone-as-a-key localization based on object detection
US20080258870A1 (en) Remote control system and method
CN102419431A (en) Communication terminal position judging device
JP2011147104A (en) Communication terminal position determining apparatus
CN111886515A (en) Distance measuring system
CN102237938A (en) System judging whether radio communication is formal
CN111674358A (en) Keyless entry system and control method thereof
CN111907472B (en) Vehicle control method and device, vehicle lock system, vehicle and storage medium
CN102102470B (en) Communication terminal position determination device
JP2011079462A (en) Tire location registering system and tire location registering method
US9472035B2 (en) Remote convenience method and apparatus with reduced signal nulls
US20110254660A1 (en) Integrated system and method for tire pressure monitoring and remote keyless entry
CN113993755B (en) Method and device for remote control of safety functions of a motor vehicle by means of a mobile communication terminal
CN111812624A (en) Distance measuring system, distance measuring device and distance measuring method
US9802573B2 (en) Smart key system
KR101049666B1 (en) User identification card system and smart key detection method
WO2019111682A1 (en) Communications system for vehicles, on-board communications device, and communications method for vehicles

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C05 Deemed withdrawal (patent law before 1993)
WD01 Invention patent application deemed withdrawn after publication

Application publication date: 20120418