CN1581201A - System and method for positioning motor vehicle and monitoring its flow using electronic identification plate - Google Patents
System and method for positioning motor vehicle and monitoring its flow using electronic identification plate Download PDFInfo
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- CN1581201A CN1581201A CN 200410022567 CN200410022567A CN1581201A CN 1581201 A CN1581201 A CN 1581201A CN 200410022567 CN200410022567 CN 200410022567 CN 200410022567 A CN200410022567 A CN 200410022567A CN 1581201 A CN1581201 A CN 1581201A
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Abstract
The present invention relates to a system for utilizing electronic identity plate to moitor motor-driven vehicle location and flow rate and its method. It is characterized by that the electrnic identity plate is fixed in the microwave-nonshielded position on the motor-driven vehicle, the electronic identity plate is formed from antenna and device connected with antenna for receiving interrogating signal and transmitting code signal, and several node receiving devices are distributed along road, and the node receiving device is formed from antenna and device for receiving code signal and transmitting interrogating signal. The device for receiving code signal is connected with system main machine positioned in monitoring station by means of transmission system, the main machines of all the monitoring stations are connected by means of network.
Description
Technical field:
The present invention is relevant with the system and method for a kind of vehicle location and flow monitoring.
Background technology:
At the location of vehicle, generally adopting at present is Global Positioning System (GPS) GPS.This system utilizes many position location satellites of U.S. emission, based on the observed quantity of this satellite to distance between user's receiving terminal machine antenna, and determines the coordinate of monitoring target according to the known satellite instantaneous coordinate.This system has the bearing accuracy height, and advantages such as technology maturation are used widely at aspects such as taxi safety track and localization.But it is external that the intellecture property of this system belongs to, restricted by it at aspects such as system's operations, in addition, the finished product that abroad provides can only be provided the positioning chip of all terminal modules, so valuable product, only the separate unit price of terminal module is just up to thousands of yuans, system's construction cost height, and burden for users is heavy.
At road junction, city flow monitoring, generally adopt at present at monitoring track installation induction installation and implement flow monitoring and control in conjunction with the method for supporting image capture device and graphical analysis.Because this system core technology is based on Flame Image Process and analysis, thereby exists the systems technology difficulty big, the construction cost height, install complicated, the high inadequately defective of accuracy.
The content of invention:
It is low to the purpose of this invention is to provide a kind of cost of investment, is convenient to install, and utilizes the electronic identity board to carry out the system and method for motor vehicles location and flow monitoring.
The present invention is achieved in that
The present invention utilizes the electronic identity board to carry out the system of motor vehicles location and flow monitoring, electronic identity board 1 is fixedly installed in non-shielding place of microwave on the motor vehicle, electronic identity board 1 is made of the device of antenna 10 and connected reception interrogating signal and transmit coded signals, some node R-T unit 2 is provided with on the way in road, node R-T unit 2 is made of the device of antenna 25 and received encoded signal and emission interrogating signal, the device of received encoded signal is connected with the system host 4 that is positioned at the monitoring station by transmission system 3, and the main frame 4 of each monitoring station connects by network.
The antenna 10 of electronic identity board is connected with commutation circuit 18, commutation circuit 18 is a switch chip, its ANTI/O pin is connected with antenna, its RXOUT pin is connected with the RXIN pin of transceiver module 13, its TXIN pin is connected with the TXOUT pin of transceiver module through power amplifier, the RXOUT pin of transceiver module 13 is connected with the register of comparator circuit 14, comparator circuit 14 is by sealing in and going out shifting processing circuit 54, digital comparator stage joint group 55, coded signal generation circuit 56, shifting processing circuit 54 is formed the C of register by shift register
1Pin is that the CP pulse input end is connected with the output of crystal oscillator, and the ID end receives the RXOUT pin of sending out module 13 for the D data input pin, and the output port ID step-by-step of four registers meets the corresponding input port P of a comparer of digital comparator stage joint group 55
0, P
1, P
2, P
3Pin, pulse is sent out in the input contact of the scrambler of coded signal generation circuit 56 and identification code is provided with button group S
0, S
1, S
2, S
3, it exports Y
0, Y
1, Y
2, Y
3Insert the corresponding input port Q of digital comparator bank joint group respectively
0, Q
1, Q
2, Q
3, the R of the final output terminal contact of the P=Q of digital comparator bank joint group Power Generation Road 15
DEnd, trigger circuit 15 constitute its R by two rejection gates or two Sheffer stroke gate cross-couplings
DEnd is for directly putting the O end, the Q end of its this mutual output terminal Q Q is connected with encode the 1NT pin of output processing circuit 16 and the TXIN pin of commutation circuit, treatment circuit 16 is a single-chip microcomputer, write and store the numerical coding sequence in advance, its TXD pin is connected its P with the DATA1N pin of transceiver module 13
1,0The R of pin and trigger circuit 17
DConnect, trigger circuit 17 are made of two rejection gates or two Sheffer stroke gate cross-couplings, and its Q end is connected with the TXIN pin of commutation circuit 18, has power circuit 11 to be connected with foregoing circuit.
The antenna 25 of node R-T unit 2 is connected with commutation circuit 31, commutation circuit 31 is a switch chip, its ANTI/O pin is connected with antenna, the RXOUT pin is connected with the RXIN end of transceiver module 30, the TXIN end is connected by power amplifier with the TXOUT end of transceiver module 30, the RXOUT end of transceiver module 30 is connected with the RXIN end of forwarding module 32, forwarding module 32 is a programmable single chip computer, its RXOUT termination wire transmission interface 22 is or/and wireless transmission interface 23, the output of node interrogating signal hair tonic circuit 28 connects node interrogating signal serial output processing circuit 29, and the output of circuit 29 receives the DATAIN end of a module 30 and the RX/TX end of commutation circuit 31.
Node interrogating signal generative circuit 28 is made up of 4 8421BCD scramblers, node interrogating signal serial output processing circuit 29 is by the CT744LS199 of two cascades also---and the string converter is formed, two scramblers are one group, its output connects one also---the input of string converter, and---the Q of string converter
0Pin connects the DATAIN pin of transceiver module 30, and---the Q of string converter
2-Q
7And Q
APin meets gate circuit G
1, pulse input end meets the output terminal CP of crystal oscillator, S, and the C pin meets gate circuit G
2Output, first also---the string converter gate circuit G
1Output connect two also---the string converter gate circuit G
2Input, second is also---the string converter gate circuit G
1Output meet RX/TX end and second gate circuit G of commutation circuit 31
2Input, two are also---string converter and first gate circuit G
2Output connect the input of crystal oscillator.
Commutation circuit 31 is 2436400 chips, and transceiver module 30 is the LMX3612 transceiver, and forwarding module 32 is the 89C51 single-chip microcomputer, and crystal oscillator is LTC1799.
Main frame 4 comprises wireless receiving main frame 37, the network switch 38 and central processing host 39, on the mainboard 41 of central authorities' processing host 39 central processing unit 50, storer 51 are arranged, 52, network interface card 47, video card 48, external connection keyboard/mouse data interface circuit 49, network interface card 47 is connected with the network switch 38 by interface 43, and the network switch 38 is connected with wireless receiving main frame 37 or/and forwarding module 32.
The method of the present invention's monitoring comprises the steps:
(1) the electronic identity board is issued by vehicle management department is unified when vehicle registration or annual test, and non-shielding place of the microwave signal that is fixedly mounted on this car, the license plate number coded message of this car writes before granting in the chip of coding output processing circuit 16 of electronic identity board, in vehicle ', this chip became the microwave coded signal to be launched the license plate number code conversion when electronic identity board received the interrogating signal of system, this information is received and is transferred to immediately by transmission network the on-line monitoring vehicle registration table of mainframe memory of the relevant monitoring station of access network and stores by the node R-T unit, it can both be seen and use, when vehicle sails out of boundary node, corresponding monitoring station main frame finds this car record in the vehicle registration table, this register information mark is cancelled and the time of departure, this record is transferred in the vehicle monitoring data history records table of main frame, and should write down deletion from on-line monitoring vehicle registration table, give each associated host with the status indicator information of cancelling of this car by Network Transmission, make it make same processing
(2) the node R-T unit is arranged along highway or road junction, city, under the crystal oscillator effect, node interrogating signal generative circuit 28 constantly produces one group of default systematic identification code coded signal, under the control of serial output processing circuit 29, output to signal transmitting and receiving module 30 successively and finish the modulation back is transmitted into setting by antenna signaling zone
(3) the vehicle electric identity disc is in duty to be received before not receiving interrogating signal, vehicle sails signaling zone into, after the electronic identity board receives the node interrogating signal, by the demodulation of signal transmitting and receiving module chip, under the shift pulse effect, send in each register of comparator circuit 14, divide into groups and compare by turn by per four one group in comparer with the coded data of predefined systematic identification code coded signal generation circuit output, judge the validity of interrogating signal, as effectively, then comparator circuit is exported high level, trigger circuit 15 produce a trigger pip, trigger 16 work of coding output processing circuit once, with the license plate number coded character that writes in advance that reads in the memory device internally, input signal transceiver module 13 is finished signal modulation process, and antennas outwards launches, one and the answer signal emission finish commutation circuit 18 upsets, make the electronic identity board be in interrogating signal and receive duty
(4) after the node R-T unit received the answer signal of electronic identity board in the vehicle, the license plate number coded data after transceiver module 30 demodulation process transmitted through the main frame of forwarding module to each monitoring station of network with the synthetic data of transmitting of this node numbering,
(5) each monitoring station main frame constantly collects the forwarding data of each vehicle when passing through each node R-T unit from the network switch, deposit in the on-line monitoring vehicle registration table of its memory device and harddisk storage device, the memory storage of each monitoring station main frame has monitoring node descriptor structural table
(6) when the current location of need enquiring vehicle, main frame retrieves the state-of-the-art record of this car and the nodal information in the monitoring node descriptor structural table from on-line monitoring vehicle registration table, demonstrate the current device of this car,
(7) when needs were understood the current flow status of certain node, main frame was read all records by vehicle of this node from on-line monitoring vehicle registration table, in conjunction with the node descriptor of vehicle place node, show this node present flow rate information.
Line monitor vehicle registration form comprises license plate number, type of vehicle monitoring node number, and the monitoring node classification: common or boundary node, arrive node time, reply attribute: sail or roll away from or reply project into midway.
Monitoring node descriptor table comprises: monitoring node numbering, nodename, the geographic position is described, node classification: common or boundary node, network address project, vehicle ' log history tables of data comprises license plate number, type of vehicle, monitoring node number, the monitoring node classification arrives node time, replys the attribute project.
Method and system of the present invention can not influenced by weather condition, the current location of the omnidistance monitoring motor vehicle of all-weather and the magnitude of traffic flow of each node, and monitoring range is wide, and system's construction cost is low.
Description of drawings:
Fig. 1 is a system chart of the present invention.
Fig. 2 is a vehicle electric identity disc structural drawing.
Fig. 3 is a node R-T unit structural drawing.
Fig. 4 is a host structure chart.
Fig. 5 is a transceiver mode switch switching circuit schematic diagram.
Fig. 6 is the transceiver module circuit theory diagrams.
Fig. 7 is a node interrogating signal comparator circuit schematic diagram.
Fig. 8 is one-bit digital comparator logic figure.
Fig. 9 is the trigger circuit schematic diagram.
Figure 10 is coded signal generation circuit theory diagrams.
Figure 11 is a train of signal line output treatment circuit schematic diagram.
Figure 12 is the signal transmitting and receiving module map.
Figure 13 is vehicle electric identity disc circuit theory diagrams.
Figure 14 is node R-T unit circuit theory diagrams.
Figure 15 sails/rolls away from monitoring section registration process process flow diagram into for vehicle.
Figure 16 is at road vehicles data acquisition flow figure.
Figure 17 is at road vehicles localization process process flow diagram.
Figure 18 is a node flow analyzing and processing process flow diagram.
Figure 19 is a host computer system data structure show table.
Figure 20 generates 2 system instruction cards of example for electronic identity board coding.
Figure 21 exports the digital signal waveform instruction card successively for electronic identity board coding generative circuit
Embodiment:
System of the present invention adopts a kind of special vehicle electric identity disc 1, a kind of node R-T unit 2, corresponding transmission system 3 and host computer system 4 to constitute complete disposal system.Wherein node R-T unit 2 is to vehicle electric identity disc 1 transmitting node inquiry (microwave) signal 5, and vehicle electric identity disc 1 is set coding (microwave) signal 6 as answer signal to 2 emissions of node R-T unit after receiving the node interrogating signal.
System architecture of the present invention is referring to accompanying drawing 1.Wherein:
1=vehicle electric identity disc.It is the front end signal generator that is fixedly installed in this patent system in the motor vehicles.Triggered by the node interrogating signal when vehicle process monitoring node and send answer signal to system, this answer signal is the license plate number of this vehicle, and the current location of vehicle is judged with this by system.
2=node R-T unit.Be used to produce electronic identity board that the system interrogation signal enters monitoring node with triggering and finish once and reply, and receive the license plate number information of launching when the electronic identity board is replied.
The 3=signal transmission network.Can be wireless transmission net or cable transmission network, be used for the electronic identity board response message that node is received and be transferred to each monitoring station host computer system.
The 4=host computer system.Finish network signal and receive the conversion storage, finish vehicle location and flow monitoring computational analysis and handle.
5=node interrogating signal.By the system banner code of launching after being modulated into microwave signal that the node R-T unit sends, the electronic identity board in the vehicle makes it produce answer signal in the entering signal district in order to trigger.
6=electronic identity board coded signal.Be subjected to the node interrogating signal to trigger the answer signal that send to system the back when vehicle process monitoring node, this signal is the license plate number of vehicle self.
Vehicle electric identity disc 1 has a shockproof dustproof housing 7, there are a battery 11 and corresponding power circuit 12 to provide required working power in the housing for whole vehicle electric identity disc, a built-in omnidirectional antenna 10, the power that transmits and receives of this antenna is set in 50 meters radiuses, work in the 2.4G frequency, this antenna links to each other with the ANT I/O mouth of transceiver mode switch switching circuit 18, be subjected to transceiver mode switch switching circuit 18 control by half-duplex work and forked working in the accepting state of node interrogating signal 5 or the emission state of electronic identity board coded signal 6, the RX of transceiver mode switch switching circuit 18
OUTThe RX of line and signal transmitting and receiving module 13
INPin links to each other, and the node interrogating signal 5 that is used for receiving imports into, TX
INLine is through the TX of a power amplifier and signal transmitting and receiving module 13
OUTPin links to each other and to be used for that license plate number is numbered signal 6 and outwards to launch, and forms the working mode change parts thus; The trigger unit that one node interrogating signal comparator circuit 14, trigger circuit 15 formed enters the coding output processing unit 16 of duty after triggered by trigger unit, and this processing unit output license plate number coded signal is sent into the DATA of transceiver module 13
INPin is also handled rearward-facing antenna transmission electronic identity board through transceiver module 13 and is numbered signal 6, after this, coding output processing unit 16 sends finishes the output services indicator signal, and output and switch switching circuit effect by trigger circuit make the upset of electronic identity board be the semidormancy state of waiting signal reception work.Vehicle electric identity disc 1 structure is referring to accompanying drawing 2 wherein:
5=node interrogating signal.
The coded signal of 6=electronic identity board.Be set at the license plate number of vehicle in advance.
7=electronic identity board shell.
The 10=antenna.Finish the omnidirectional emission of signal.
The 11=battery.
The 12=power circuit.Be used for civil power or powered battery are converted to the required stabilized power source of all circuit blocks of device.This patent adopts common power circuit.
13=wireless signal transceiver module.Finishing the reception and the emission of radiofrequency signal handles.TX wherein
OUTPin is through the TX of power amplifier and transceiver mode switch switching circuit 18
INPin links to each other, RX
INThe RX of pin and transceiver mode switch switching circuit 18
OUTPin links to each other and to finish signal and receive and signal sends to the work of antenna from antenna, and RSSI pin and emission state pilot lamp [9] connect so that signal condition demonstration level, GND pin ground connection, V to be provided
DDPin meets power supply input, RX
OUTPin is connected with node interrogating signal comparator circuit 14 with output from antenna reception and the baseband signal after signal demodulation process such as mixing, intermediate frequency amplification, DATA as the output of received signal
INPin is connected reception electronic identity board coded signal as the input of electronic identity board coded signal with train of signal line output treatment circuit 17.The circuit theory diagrams of transceiver module are referring to accompanying drawing 6.
14=node interrogating signal comparator circuit.Finish the comparison between the systematic identification code that interrogating signal is encoded and the electronic identity board is set.Circuit theory is referring to accompanying drawing 7.Circuit produces circuit bank three parts by SI PO shift register group, comparator circuit group and systematic identification code and constitutes.Wherein the SI PO shift register group is under shift order (CP pulse) effect, with interrogating signal transceiver module 13 RX
OUTThe digitally coded baseband signal (serial signal) of pin output moves by turn and deposits each single register respectively in, and by the output port of each register, the P of the digital comparer corresponding input end of corresponding tandem type mouth is sent in these signal step-by-steps
0P
1P
2P
3Pin; Simultaneously, systematic identification code coded signal generation circuit bank under the effect of start pulse signal according to S
0S
1S
2S
3Parallel 2 ary codes that produce systematic identification code of the value that sets, and step-by-step output, each scrambler output Y of this scrambler group
0Y
1Y
2Y
3Insert the Q of the digital comparer corresponding input end of tandem type mouth respectively
0Q
1Q
2Q
3Pin; In the comparator circuit group each independently comparer adopt 4 bit comparators, bear the comparison of a character (4 2 ary codes), conforming to then, the P=Q output terminal will produce a high level (" 1 "), otherwise produce low level (" 0 "), owing to be cascade, when any bit comparator output low level when (not conforming to), the final output of whole comparator stage joint group will be low level (" 0 ").When comparative result conforms to fully, the final output (high level) of comparator stage joint group will form the R of a flip-flop circuit that is attached thereto 15
DThe end input signal.
The 15=trigger circuit.Be used to produce a trigger pip.Circuit is to be made of two rejection gates or two Sheffer stroke gate cross-couplings.The flip-flop circuit principle is referring to accompanying drawing 9.Among the figure, R
DS
DTwo input ends, wherein R for trigger
DFor directly putting 0 end, S
DFor directly putting 1 end, Q Q is two complementary output ends, Q=0 when Q=1; Trigger is in 1 state during Q=1, and trigger is in 0 state during Q=0.The R of trigger
DOutput terminal direct and aforementioned system identification code comparator circuit 14 joins.Do not work or comparative result when " not conforming to " (this circuit output low level) when the systematic identification code comparator circuit, trigger keeps normality, does not produce trigger pip; When systematic identification code comparator circuit output high level, R
DHigh level causes trigger to send trigger pulse, and this pulse will trigger coded signal generation circuit bank 16 and produce one group of electronic identity board coded signal.
16=coded signal output processing unit.Storage cart trade mark information is finished the output of license plate number information.Processing unit adopts single-chip microcomputer, is used for will writing in advance and be stored under the effect of INT pin trigger pip wherein numerical coding sequence outputs to signal transmitting and receiving module 13 by the serial of TXD pin DATA
INPin and after its signal modulation processing and amplifying the answer signal as this electronic identity board send to the node retransmission unit.
The 17=trigger circuit.Identical with 15.Its Q end low level output triggers the state turnover of transceiver mode switch switching circuit.
18=transceiver mode switch switching circuit.The conversion of the signal reception of control vehicle electric identity disc and two kinds of mode of operations of signal emission.Circuit theory is referring to accompanying drawing 5.Circuit adopts " 2436400-" switch chip.Its chips ANT
I/OPin is connected with antenna; The TX/RX pin is as receiving/mode selector switch, and when this pin received the output high level of automatic triggering circuit 15, chip was in sending mode, and the radiofrequency signal of electronic identity board radiating circuit is from TX
INAntenna is introduced and be sent to pin; When the TX/RX pin received the output low level of automatic triggering circuit 17, chip was a receiving mode, and the radiofrequency signal that antenna receives is from RX
OUTBe drawn out to receiving circuit.V
DDBe the chip power input.
Node R-T unit 2 has a firm housing 21, be connected with a directional antenna 25 that can receive simultaneously and transmit on the housing, this antenna 25 is when work, and the signal coverage that is incident upon on the road surface forms a node triggering interrogation zone of setting big or small oval in shape; Housing 21 backboards have a wire transmission interface slot 22 and a wireless transmission interface slot 23, and an external power supply socket 24; There is one group of power circuit 27 to provide stable power in the housing for device; And one finished that interrogating signal 5 emission is handled and an electronic identity board numbering signal 6 receives the signal transmitting and receiving module 30 of processing and modulation and the demodulation process of received signal, the wherein TX of signal transmitting and receiving module 30 that transceiver mode switch switching circuit 31 is finished to transmit
OUTLine is through the TX of a power amplifier and transceiver mode switch switching circuit 31
INPin links to each other and is used for node interrogating signal 5 outwards being launched RX
INThe RX of pin and transceiver mode switch switching circuit 31
OUTPin links to each other and is used for reception electronic identity board answer signal 6 is formed the signal transmitting and receiving parts thus; The node interrogating signal generation part that set of number formula coded signal generation circuit 28 and train of signal line output treatment circuit 29 are formed is finished the generation of interrogating signal and is outputed to the DATA of signal transmitting and receiving module 30
INPin; And one and signal transmitting and receiving module 30RX
OUTThe electronic identity board coded signal that pin links to each other transmit processing module 32 finish receive electronic identity board coded signal and make up with this node serial number signal after signal is outputed to wire transmission interface 22 or wireless transmission interface 23 slots for unofficial biography.
5=node interrogating signal
6=electronic identity board coded signal
21=node R-T unit shell
22=wire transmission output interface
23=wireless transmission output interface
The 24=external power interface.Be the reference power supply interface.
The 25=antenna
The 26=battery.Be common batteries.Amount of capacity depends on system's microwave emissive power requirement.
The 27=power circuit.Be the reference power supply circuit.
28=node interrogating signal generative circuit group.Circuit theory is referring to accompanying drawing 10.
29=node interrogating signal train of signal line output treatment circuit.Circuit theory is referring to accompanying drawing 12.
The 30=radio receiving transmitting module.Finishing the reception and the emission of radiofrequency signal handles.TX wherein
OUTPin is through the TX of power amplifier and transceiver mode switch switching circuit 31
INPin links to each other, RX
INThe RX of pin and transceiver mode switch switching circuit 31
OUTPin links to each other and to finish signal and receive and signal sends to the work of antenna, GND pin ground connection, V from antenna
DDPin meets power supply input, RX
OUTPin is as the output of received signal and the RX of answer signal forwarding module 32
INPin connects with output from antenna reception and the baseband signal after signal demodulation process such as mixing, intermediate frequency amplification, DATA
INPin is connected the receiving node interrogating signal as the input of node interrogating signal with train of signal line output treatment circuit [29].The circuit theory diagrams of transceiver module are referring to accompanying drawing 6.
34=answer signal forwarding module.Adopt programmable single chip computer chip 89C51.Finish the access of electronic identity board answer signal and make up with this node serial number signal after signal is passed through RX
OUTPin outputs to the work for unofficial biography of wire transmission interface 22 and wireless transmission interface 23 slots.Circuit theory is referring to accompanying drawing 13.
Host computer system 4 comprises a cover wireless signal centralized processor 37, the cover network switch 38 and a central processing host 39.Wireless signal centralized processor 37 can adopt common wireless receiving main frame, and access network switch 38, this switch can adopt common switch product, as the WS-C3750G-24T-E of U.S. CISCO company, inserts central processing host 39 at last.When wire transmission, the direct access network switch 38 of transmission line, and do not need wireless receiving main frame 37 as the signal centralized processor.Central authorities' processing host 39 adopts common PC computer organization, a firm housing 40 is arranged, an interface 43 that is used to connect the network switch is arranged on the housing, an external power interface 42, the interface 46 of an external display device, an external connection keyboard interface 44, a mouse interface 45, comprise a computer motherboard 41 in the housing, being inserted with a network interface card 47 that is used to connect switch on the mainboard 41 is used for gathering and switching network transmission data, a video card 48 is used for host information and outputs to external display, keyboard interface processing element and mouse interface processing element 49, a central processing unit (CPU) 50 is used for system management and working procedure, one group of read-write memory unit (RAM) 51 that is used to deposit process information is used to deposit the ephemeral data that Monitoring Data that front-end collection enters and running software use, the result data that the hard disk parts (HD) that are used for the long-term storage data that are connected with mainboard 41 52 are preserved all image data and handled through special software processing, a vehicle location and node flow are installed in the hard disk parts (HD) 52 analyze special software 53, finish all and register at road vehicles, the data acquisition of monitored vehicle position information, functions such as node flow computational analysis.
The host computer system structure is referring to accompanying drawing 4 wherein:
37=wireless receiving main frame
The 38=network switch
39=central authorities processing host
The 40=host housing
The 41=mainboard.Be the common computer mainboard.
The 42=external power interface.Be the common computer power interface.
The 43=network interface.Be common computer network interface card interface.
44=external connection keyboard interface.Be the common computer keyboard interface
The external mouse interface of 45=.Be the common computer mouse interface.
46=external connection display equipment interface.Be common computer video card interface.
The 47=network interface card.Be the common computer network interface card.
The 48=video card.Be the common computer video card.
49=external connection keyboard/mouse data interface circuit.Be common computer keyboard/mouse interface circuit.
The 50=central processor CPU.Be common computer CPU, as the Pentium-4 chip of American I NTEL company.
51=random access storage device RAM.Be the common computer memory bar.
52=harddisk memory HD.Be the common computer hard disk.
53=dedicated processes software
Method flow of the present invention is as follows:
1, the vehicle electric identity disc was issued or is reissued during annual test by vehicle management department is unified in when vehicle registration, and the non-screening-off position of the microwave signal that is fixedly mounted on this car, the license plate number coded message of this vehicle writes the electronic identity board by granting department before granting, in the vehicle ', this electronic identity board becomes the microwave coded signal to be launched the license plate number code conversion that sets when receiving the system interrogation signal, this information is received by the node R-T unit and is transferred to other relevant host computer systems of access network immediately by transmission network, so that this information of vehicles can both be seen and use by system's relevant monitoring station host computer system.When vehicle sails out of boundary node, system is to this vehicle mark " cancelling monitoring " status indicator, to finish the registration of sailing out of to this vehicle, thereafter, host computer system is transferred to the host computer system of other each porch of access network with " cancelling monitoring " status indicator information of this car by computer network, so that the All hosts of total system is cancelled this monitoring state to car.
2, all node R-T units of system of the present invention according to the monitoring needs along highway or road junction, city wagon flow direction by the certain spacing layout and be fixedly mounted on highway or the monitoring point, road junction to form monitoring net.The node R-T unit makes node interrogating signal generative circuit constantly produce a group coding signal under the clock signal effect, this signal can adopt systematic identification code and before system installs by code switch D
0-D
9Set, signal outputs to the signal transmitting and receiving module successively and finishes the signal modulation under the control of serial output processing circuit, can be to form for the node interrogating signal of emission, this interrogating signal is transmitted into the signaling zone of setting by antenna, and this signaling zone is formed the node inquiry trigger region of an oval in shape by the covering of microwave signal.
3, the vehicle electric identity disc is in duty to be received before not receiving interrogating signal.When vehicle enters the node interrogation zone, after the vehicle electric identity disc receives the node interrogating signal, will at first pass through signal transmitting and receiving module demodulation process, encoded again comparator circuit is judged the validity of this interrogating signal, conform to as setting sign indicating number with native system, then comparator circuit is exported high level, the S of trigger circuit
DTermination causes the output terminal Q of trigger to produce a trigger pip after receiving this level signal, trigger its coding output processing unit work once, coding output processing unit will read the license plate number coded character that writes in advance in the memory device internally, the input signal transceiver module is finished signal modulation process, and send emitting antenna outwards to launch, finish the reply registration work of vehicle thus to current monitoring node.In case finish the signal emission, transceiver mode on-off circuit state turnover makes the electronic identity board be in interrogating signal and receives duty.
4, after the node R-T unit received the answer signal of electronic identity board in the vehicle, the coded data after the signal transmitting and receiving module is with electronic identity board answer signal demodulation process synthesized the forwarding data with this node numbering and transmits to each host computer system of network through forwarding module.
5, host computer system is installed on each Surveillance center.When system adopted the wire transmission pattern, node signal was the network switch that directly imports each host computer system through network transmission line into; When system adopted wireless communication mode, node signal was to be delivered to each the host computer system wireless receiving main frame and the network switch and finally to enter host computer system through radio transmission apparatus.
6, respectively monitoring host computer system constantly collects each vehicle from the network switch and replys register information when passing through each node, deposit memory device and harddisk storage device in, through the special software computational analysis, obtain the current region position of monitored vehicle and the vehicle flow data of respective nodes.
It is the background process center of system that the special software of system is handled, and installs and runs in each measuring station host computer system.Data by computer network pass mutually, make work compound between the multi-host system of patent system, the monitoring task of finishing that cooperatively interacts.Special software mainly contain vehicle when entering monitoring net information registering and network delivery module, vehicle each monitoring node of passing through send automatic data collection processing module, vehicle location processing module and the monitoring node flow analysis processing module etc. of response message to system.For better understanding the operational detail of this patent system, the processing logic of each module is described as follows.
Information of vehicles Registration Module wherein is included in vehicle and enters when inlet monitoring vehicle monitoring state of cancelling registration process two parts when entering monitoring section registration process and vehicle and sailing out of monitoring section.Entering monitoring section registration process logic is: when receiving the license plate number coding that an electronic identity board sends, on-line monitoring vehicle registration table is at first retrieved by system, unregistered in this table have this vehicle, explanation is newly to sail vehicle into, system is added to on-line monitoring vehicle registration table with this car information, the information such as being about to license plate number, monitoring station numbering, the enrollment time that enters the mouth of existing side by side are transferred to other monitoring station host computer systems by computer network, all can see and use in each host computer system of whole network so that enter the information of vehicles of monitoring section.The vehicle monitoring state of cancelling registration process logic when vehicle sails out of monitoring section is: when vehicle is sailed through the border monitoring node, this car place record is accomplished by system in on-line monitoring vehicle registration table, to this register information mark " cancelling monitoring " status indicator and time of departure, this record is transferred in the monitoring net vehicle monitoring data history records table, and should write down deletion from on-line monitoring vehicle registration table, thereafter, host computer system is transferred to " cancelling monitoring " status indicator information of this car other associated host systems of access network by computer network.The online vehicle registration processing logic of this patent is referring to accompanying drawing 15.
The processing logic of data acquisition module wherein is: when receiving from license plate number coded data that Network Transmission transmits from certain node R-T unit, obtain the host computer system current time, record in the on-line monitoring vehicle registration table with replying license plate number and node serial number.The data acquisition process logic of the host computer system special software of this patent is referring to accompanying drawing 16.
The processing logic of vehicle location analysis and processing module wherein is: when the user needed the current location of enquiring vehicle, system retrieved the state-of-the-art record of this car from on-line monitoring vehicle registration table, showed together in conjunction with the descriptor of vehicle place node.
Host computer system vehicle location analyzing and processing logic of the present invention is referring to accompanying drawing 18.
The processing logic of node flow analysis and processing module wherein is: when the user need understand the current traffic conditions of certain node, the record of all vehicles that passing through of this node is read by system from on-line monitoring vehicle registration table, show together in conjunction with the descriptor of vehicle place node.Node flow analyzing and processing logic of the present invention is referring to accompanying drawing 18.
The data structure of host computer system special software wherein is referring to accompanying drawing 19.
Mobile and the state exchange of system signal is described as follows:
The state exchange of the answer signal that system produces in interrogating signal that the node R-T unit produces and vehicle electric identity disc all has the rule of following characteristics:
Digitally encoded signal → baseband signal → band signal → radiofrequency signal ... (antenna) ... radiofrequency signal → band signal → baseband signal → digitally encoded signal
The system interrogation signal: produce by the node R-T unit,, receive by the electronic identity board through the antenna emission.State conversion process is:
● by the state value decision systems identification code of the code switch group of node R-T unit inner setting, handle the 2 system baseband signals that are output as a group (4 characters) and line output through its node interrogating signal generative circuit; Be converted into the signal of 2 systems ' 1001 ' as numeral ' 9 ';
● this signal is transformed to the baseband signal of serial output by parallel input under sequential circuit control;
● the baseband signal of serial output is output as radiofrequency signal and is admitted to antenna and outwards launch through node signal transceiver module modulation treatment;
● the vehicle electric identity disc receives radiofrequency signal described above (system interrogation signal) through antenna, is baseband signal through signal transmitting and receiving module demodulation process;
● baseband signal is through the comparison operation of vehicle electric identity disc comparator circuit, with the validity of judging interrogating signal and form a high level pulse ripple effectively the time, this pulsating wave will act on the input end of trigger circuit and make trigger circuit send a trigger pip.So far, the system interrogation signal condition change-over period finishes.
Electronic identity board answer signal: produce by the vehicle electric identity disc,, receive by the node R-T unit through the antenna emission.The system interrogation signal similar that state conversion process and node R-T unit produce, just direction is opposite.Be briefly described as follows:
● determine the encoded radio of this electronic identity board by the status switch value of the code switch group of vehicle electric identity disc inner setting, this is coded in the license plate number that is set to the place vehicle in the application, handles the 2 system baseband signals that are output as a group (8 characters) and line output through its coding generative circuit;
● the baseband signal of serial output is output as radiofrequency signal and is admitted to antenna and outwards launch through signal transmitting and receiving module modulation treatment;
● the node R-T unit receives electronic identity board radiofrequency signal described above (license plate number coded signal) through its antenna, is baseband signal through node signal transceiver module demodulation process;
● baseband signal is transmitted parts to Network Transmission through node.So far, electronic identity board answer signal state exchange end cycle.
The signal that the node R-T unit is transmitted to each host computer system of network: be that example is done concise and to the point description here with the wire transmission mode:
● the forwarding parts of node R-T unit synthesize the forwarding data with the electronic identity board answer signal that receives with this node numbering and send to the network output interface, are transferred to network switch receiving port through Network transmission line:
● main frame of the present invention is obtained signal from the switch receiving port, or puts into internal memory or deposit hard disk in and use for special software.
For further specifying the present invention, as follows especially exemplified by example.But content of the present invention is not limited only to content related among the embodiment.
Vehicle electric identity disc 1 adopts the LMX3162 integrated chip of National company in the present embodiment, and license plate number coding output processing unit adopts the 89C51 singlechip chip, and this vehicle electric identity disc 1 frequency of operation is 2.4GHz.Basic circuit structure is referring to accompanying drawing 12.The circuit working principle is:
Under the trigger pulse effect, the license plate number coded signal of one group of electronic identity board stored is sent into the DATA of signal transmitting and receiving module LMX3162 from 89C51 singlechip chip TXD pin
INPin when all license plate number coded signal output services finish, causes the RX/TX pin of negative pulse of trigger circuit output to signal switching circuit with indicator signal of output, with the marking signal as ' send and finish '.
From vehicle electric identity disc LMX3612 chip DATA
INThe data of pin serial input are through signal modulation process, from TX
OUTPin output is launched to antenna through on-off circuit.
Under the pulse action of device internal clock, one group system identification code signal produces in the setting code generation circuit of being made up of 4 8421 scramblers, this setting sign indicating number is divided into 2 groups for one group by per two characters, the parallel data input end D that makes up with the CT744LS199 parallel-serial converter of cascade is connected respectively, and every group coding signal will be input to the pin D of the CT744LS199 parallel-serial converter of a correspondence
0D
1D
2D
3D
4D
5D
6D
7, finish the serial output transform of parallel data and handle, and from its Q
0Pin pursue-is sent into data the DATA of signal transceiver
INPin, when this group data processing finishes, and-the gate circuit G of string manipulation circuit
1To export a negative pulse and trigger the work of next CT744LS199 parallel-serial converter, finish until the data-switching of two groups of representative system identification codes.When second level CT744LS199 parallel-serial converter work finishes, its gate circuit G
1With the RX/TX pin of negative pulse of output, with marking signal as ' send and finish ' to signal switching circuit.
From node R-T unit LMX3612 chip DATA
INThe data of pin serial input are through the signal modulation process of node R-T unit, from TX
OUTPin output is launched to antenna through on-off circuit.
Electronic identity board answer signal 6 is by the RX of LMX3162 signal transceiver module
INPin enters, and passes through RX after demodulation process
OUTPin outputs to the 89C51 singlechip chip, and this chip is after finishing the signal demodulation process, and this node numbering data that will write in advance automatically among the CMOS are numbered data combination with the electronic identity board that receives, from RX
OUTPin outputs to output interface.Data will be transferred to network through output interface.
System coding System Design example.
System coding system of the present invention comprises: systematic identification code, electronic identity board numbering, nodes encoding and host computer system coding.As one embodiment of the present of invention, the coding scheme of system of the present invention can adopt following rule:
1, systematic identification code=' 6666 '.
2, electronic identity board numbering is identical with the license plate number of vehicle, adopt 8 characters long, the provincial identity code that wherein shows province other " capital ", " river ", " Guangdong " etc. is combined into provincial coding with two character marks of encoding, for example, " capital " usefulness " 01 " expression, " river " usefulness " 28 " expressions etc. are by this coding rule, in this patent system, license plate number is set to " 28ACY888 " for the coding of the electronic identity board that vehicle issued of " river A CY888 ".
3, nodes encoding adopts 4 codings in order to distinguish different monitoring nodes, as ' 1006 ', ' 1032 ' etc.
4, host computer system coding adopts 4 codings in order to distinguish different monitoring stations, as ' 7016 ', ' 7012 ' etc.
Under the coding scheme of this example, the node interrogating signal that each node R-T unit produced is ' 6789 ', this identification code will be by the signal transmitting and receiving module modulation treatment of node R-T unit after antenna launch.
Under the coding scheme of this example, the encoding the response that electronic identity board that is encoded to " 28ACY888 " is launched when node is replied is " 28ACY888 ".The nodes encoding of supposing the vehicle process is ' 7033 ', after this node R-T unit receives this coding, synthetic this node Monitoring Data: a string node coding+this electronic identity board number information ' 703328ACY888 ', each monitoring station or charge station's host computer system be sent and be transferred to these data will to network system.In like manner, after this car arrived ' 7034 ' node, the data that this node sent were ' 703428ACY888 '.
Claims (10)
1, utilize the electronic identity board to carry out the system of motor vehicles location and flow monitoring, it is characterized in that electronic identity board (1) is fixedly installed in non-shielding place of microwave on the motor vehicle, electronic identity board (1) is made of the device of antenna (10) and connected reception interrogating signal and transmit coded signals, some node R-T units (2) are provided with on the way in road, node R-T unit (2) is made of the device of antenna (25) and received encoded signal and emission interrogating signal, the device of received encoded signal is connected with the system host that is positioned at the monitoring station (4) by transmission system (3), and the main frame of each monitoring station (4) connects by network.
2, system according to claim 1, the antenna (10) that it is characterized in that the electronic identity board is connected with commutation circuit (18), commutation circuit (18) is a switch chip, its ANTI/O pin is connected with antenna, its RXOUT pin is connected with the RXIN pin of transceiver module (13), its TXIN pin is connected with the TXOUT pin of transceiver module through power amplifier, the RXOUT pin of transceiver module (13) is connected with the register of comparator circuit (14), comparator circuit (14) is by sealing in and going out shifting processing circuit (54), digital comparator stage joint group (55), coded signal generation circuit (56), shifting processing circuit (54) is made up of shift register, the C of register
1Pin is that the CP pulse input end is connected with the output of crystal oscillator, and the ID end receives the RXOUT pin of sending out module (13) for the D data input pin, and the output port ID step-by-step of four registers meets the corresponding input port P of a comparer of digital comparator stage joint group (55)
0, P
1, P
2, P
3Pin, pulse is sent out in the input contact of the scrambler of coded signal generation circuit (56) and identification code is provided with button group S
0, S
1, S
2, S
3, it exports Y
0, Y
1, Y
2, Y
3Insert the corresponding input port Q of digital comparator bank joint group respectively
0, Q
1, Q
2, Q
3, the R of the final output terminal contact Power Generation Road of the P=Q of digital comparator bank joint group (15)
DEnd, trigger circuit (15) constitute its R by two rejection gates or two Sheffer stroke gate cross-couplings
DEnd is for directly putting 0 end, S
DEnd is for directly putting 1 end ground connection, the Q end of its complementary output end QQ is connected with the 1NT pin of coding output processing circuit (16) and the TXIN pin of commutation circuit, treatment circuit (16) is a single-chip microcomputer, write and store the numerical coding sequence in advance, its TXD pin is connected its P with the DATA1N pin of transceiver module (13)
1,0The R of pin and trigger circuit (17)
DConnect, trigger circuit (17) are made of two rejection gates or two Sheffer stroke gate cross-couplings, and its Q end is connected with the TXIN pin of commutation circuit (18), has power circuit (11) to be connected with foregoing circuit.
3, system according to claim 2 is characterized in that commutation circuit (18) is 2436400 chips, and transceiver module is the LMX3612 transceiver, and scrambler is 8421, and comparer is CT7485, and coding output processing circuit (16) is the 89C51 single-chip microcomputer.
4, system according to claim 1, the antenna (25) that it is characterized in that node R-T unit (2) is connected with commutation circuit (31), commutation circuit (31) is a switch chip, its ANTI/O pin is connected with antenna, the RXOUT pin is connected with the RXIN end of transceiver module (30), the TXIN end is connected by power amplifier with the TXOUT end of transceiver module (30), the RXOUT end of transceiver module (30) is connected with the RXIN end of forwarding module (32), forwarding module (32) is a programmable single chip computer, its RXOUT termination wire transmission interface (22) is or/and wireless transmission interface (23), the output of node interrogating signal hair tonic circuit (28) connects node interrogating signal serial output processing circuit (29), and the output of circuit (29) receives the DATAIN end of a module (30) and the RX/TX end of commutation circuit (31).
5, system according to claim 4, it is characterized in that node interrogating signal generative circuit (28) is made up of 4 8421BCD scramblers, node interrogating signal serial output processing circuit (29) is by the CT744LS199 of two cascades also---and the string converter is formed, two scramblers are one group, its output connects one also---the input of string converter, and---the Q of string converter
0Pin connects the DATAIN pin of transceiver module (30), and---the Q of string converter
2-Q
7And Q
APin meets gate circuit G
1, its pulse input end meets the output terminal CP of crystal oscillator, S, and the C pin meets gate circuit G
2Output, first also---the string converter gate circuit G
1Output connect two also---the string converter gate circuit G
2Input, second is also---the string converter gate circuit G
1Output meet RX/TX end and second gate circuit G of commutation circuit (31)
2Input, two are also---string converter and first gate circuit G
2Output connect the input of crystal oscillator.
6, system according to claim 5 is characterized in that commutation circuit (31) is 2436400 chips, and transceiver module (30) is the LMX3612 transceiver, and forwarding module (32) is the 89C51 single-chip microcomputer, and crystal oscillator is LTC1799.
7, system according to claim 1, it is characterized in that main frame (4) comprises wireless receiving main frame (37), the network switch (38) and central processing host (39), on the mainboard (41) of central authorities' processing host (39) central processing unit (50), storer (51 are arranged, 52), network interface card (47), video card (48), external connection keyboard/mouse data interface circuit (49), network interface card (47) is connected with the network switch (38) by interface (43), and the network switch (38) is connected with wireless receiving main frame (37) or/and forwarding module (32).
8, utilize the electronic identity board to carry out the method for motor vehicles location and flow monitoring, comprise the steps:
(1) the electronic identity board is issued by vehicle management department is unified when vehicle registration or annual test, and non-shielding place of the microwave signal that is fixedly mounted on this car, the license plate number coded message of this car writes before granting in the chip of coding output processing circuit (16) of electronic identity board, in vehicle ', this chip became the microwave coded signal to be launched the license plate number code conversion when electronic identity board received the interrogating signal of system, this information is received and is transferred to immediately by transmission network the on-line monitoring vehicle registration table of mainframe memory of the relevant monitoring station of access network and stores by the node R-T unit, it can both be seen and use, when vehicle sails out of boundary node, corresponding monitoring station main frame finds this car record in the vehicle registration table, this register information mark is cancelled and the time of departure, this record is transferred in the vehicle monitoring data history records table of main frame, and should write down deletion from on-line monitoring vehicle registration table, give each associated host with the status indicator information of cancelling of this car by Network Transmission, make it make same processing
(2) the node R-T unit is arranged along highway or road junction, city, under the crystal oscillator effect, node interrogating signal generative circuit (28) constantly produces one group of default systematic identification code coded signal, under the control of serial output processing circuit (29), output to signal transmitting and receiving module (30) successively and finish the modulation back is transmitted into setting by antenna signaling zone
(3) the vehicle electric identity disc is in duty to be received before not receiving interrogating signal, vehicle sails signaling zone into, after the electronic identity board receives the node interrogating signal, by the demodulation of signal transmitting and receiving module chip, under the shift pulse effect, send in each register of comparator circuit (14), divide into groups and compare by turn by per four one group in comparer with the coded data of predefined systematic identification code coded signal generation circuit output, judge the validity of interrogating signal, as effectively, then comparator circuit is exported high level, trigger circuit (15) produce a trigger pip, trigger coding output processing circuit (16) work once, with the license plate number coded character that writes in advance that reads in the memory device internally, input signal transceiver module (13) is finished signal modulation process, and antennas outwards launches, one and the answer signal emission finish commutation circuit (18) upset, make the electronic identity board be in interrogating signal and receive duty
(4) after the node R-T unit received the answer signal of electronic identity board in the vehicle, the license plate number coded data after transceiver module (30) demodulation process transmitted through the main frame of forwarding module to each monitoring station of network with the synthetic data of transmitting of this node numbering,
(5) each monitoring station main frame constantly collects the forwarding data of each vehicle when passing through each node R-T unit from the network switch, deposit in the on-line monitoring vehicle registration table of its memory device and harddisk storage device, the memory storage of each monitoring station main frame has monitoring node descriptor structural table
(6) when the current location of need enquiring vehicle, main frame retrieves the state-of-the-art record of this car and the nodal information in the monitoring node descriptor structural table from on-line monitoring vehicle registration table, demonstrate the current device of this car,
(7) when needs were understood the current flow status of certain node, main frame was read all records by vehicle of this node from on-line monitoring vehicle registration table, in conjunction with the node descriptor of vehicle place node, show this node present flow rate information.
9, method according to claim 8 is characterized in that on-line monitoring vehicle registration table comprises license plate number, type of vehicle, monitoring node number, the monitoring node classification: common or boundary node, arrive node time, reply attribute: sail or roll away from or reply project into midway.
10, method according to claim 8, it is characterized in that monitoring node descriptor table comprises: monitoring node numbering, nodename, the geographic position is described, node classification: common or boundary node, network address project, vehicle ' log history tables of data comprises license plate number, type of vehicle, monitoring node number, monitoring node classification, arrive node time, reply the attribute project.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410022567 CN1581201A (en) | 2004-05-21 | 2004-05-21 | System and method for positioning motor vehicle and monitoring its flow using electronic identification plate |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410022567 CN1581201A (en) | 2004-05-21 | 2004-05-21 | System and method for positioning motor vehicle and monitoring its flow using electronic identification plate |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100362361C (en) * | 2004-04-23 | 2008-01-16 | 刘学明 | Downhole operation staff positioning and tracking system and method thereof |
| CN102436755A (en) * | 2011-08-22 | 2012-05-02 | 蒋菊生 | Vehicle positioning method according to Internet and Internet of things |
| CN106373403A (en) * | 2016-08-31 | 2017-02-01 | 孟玲 | Intelligent vehicle management system |
-
2004
- 2004-05-21 CN CN 200410022567 patent/CN1581201A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100362361C (en) * | 2004-04-23 | 2008-01-16 | 刘学明 | Downhole operation staff positioning and tracking system and method thereof |
| CN102436755A (en) * | 2011-08-22 | 2012-05-02 | 蒋菊生 | Vehicle positioning method according to Internet and Internet of things |
| CN106373403A (en) * | 2016-08-31 | 2017-02-01 | 孟玲 | Intelligent vehicle management system |
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