CN1558381A - Token type speed monitoring method and system for vehicle - Google Patents

Abstract

The present invention is token type vehicle speed monitoring system and method. The token device is set in the no-shielding part in motor vehicle, and consists of antenna and a unit connected to the antenna for receiving enquiry signal and emitting encoded signal. The node transceiver is set along highway, and consists of antenna, encoded signal receiver and enquiry signal emitter. The encoded signal receiver transmits the encoded signal via transmission system to the system unit in the monitoring station.

Description

Token formula speed of a motor vehicle monitoring method and system

Technical field:

Drive over the speed limit monitoring method and system of the present invention and a kind of on-highway motor vehicle is relevant.

Background technology:

It is the chief culprit who causes traffic hazard that motor vehicles are driven over the speed limit, and how effectively controlling driving over the speed limit of vehicle in express way is the important subject of traffic safety.The product that is widely used in an on-highway motor vehicle travel speed Monitoring and Controlling at present is mostly or is fixedly installed in highway monitoring point or the hand-held velocity radar that uses, because of based on video image processing technology, and certain limitation that this series products exists.For example: all weather operations ability, can only normally play a role daytime preferably at light, the monitoring effect under weather conditions such as night, heavy rain, dense fog obviously reduces; Monitoring range is narrow, belongs to the reconnaissance monitoring pattern basically, can not accomplish omnidistance formula speed monitoring, and the hypervelocity phenomenon of motor vehicles can't be effected a radical cure; System's construction cost is big when realizing that the omnidistance speed of a motor vehicle of highway is monitored, thereby only installs and uses at special road section mostly.

The content of invention:

The purpose of this invention is to provide a kind of token formula speed of a motor vehicle monitoring method and system that can carry out omnidistance formula speed monitoring to vehicle.

The present invention is achieved in that

Token formula speed of a motor vehicle monitoring system of the present invention, token device 1 is positioned at non-shielding place of microwave on the motor vehicle, device by antenna 10 and connected reception interrogating signal 5 and transmit coded signals 6 constitutes, node R-T unit 2 be positioned at highway along the line on, be made of the device of antenna 25 and received encoded signal 6 and the device of emission interrogating signal 5, the device of received encoded signal 6 is transported to coded signal 6 system host 4 that is positioned at each monitoring station by transmission system 3.

Power circuit 11 and the transceiver mode switch switching circuit 18 that is connected with built-in omnidirectional antenna 10 are arranged, the input end RX of commutation circuit output and signal transmitting and receiving module 13 in the housing of token device 1 _INConnect, the commutation circuit input end is by the output terminal TX of power amplifier and transceiver module 13 _OUTConnect the output terminal RX of signal transmitting and receiving module 13 _OUTPass through the input end DATA of signal comparator circuit 14, trigger circuit 15, coded signal generation circuit 16, train of signal line output treatment circuit 17 and transceiver module 13 successively _INConnect.

Signal comparator circuit 14 is formed the RX of the 1D termination transceiver module 13 of the registers group of treatment circuit 54 by sealing in and going out shifting processing circuit 54, comparator circuit 55 and systematic identification code generation circuit 56 _OUTEnd, the output terminal 1D step-by-step of registers group meet the corresponding input end mouth P of the digital comparer of corresponding tandem type of comparator circuit 55 ₀, P ₁, P ₂, P ₃Pin, the input end Q of comparer ₀, Q ₁, Q ₂, Q ₃Pin is the output of each scrambler of connection circuit 56 respectively, and the scrambler input connects button group and trigger pulse are set, cross-linked two rejection gates of the output terminal contact Power Generation Road 15 of comparer or the input end R of two Sheffer stroke gates _DThe output of gate circuit connects the input end of the scrambler of coded signal generation circuit 16, the output of scrambler connects the input of the CT74LS199 chip of train of signal line output treatment circuit 17, and the output of chip connects the DATAIN pin of signal transmitting and receiving module 13, and the SH of chip, CD pin meet gate circuit G ₂, Q _A, Q ₇-Q.Pin meets gate circuit G ₁, G ₁, G ₂Output terminal connect and to send and to go here and there the complement mark signal.

Node R-T unit 2 has power circuit 27 and the transceiver mode switch switching circuit 31 that is connected with antenna 25, commutation circuit 31RX _OUTThe RX of end and signal transmitting and receiving module 30 _INEnd connects, commutation circuit 31TX _INEnd is through the TX of a power amplifier and transceiver module 30 _OUTEnd connects, the RX of transceiver module 30 _OUTThe RX of end and answer signal forwarding module 32 _INEnd connects, the RX of forwarding module 32 _OUTEnd is connected with system host 4 by transmission system 3, and the output of node interrogating signal generative circuit 28 is connected with serial output processing circuit 29, the DATA of the output of circuit 29 and transceiver module 30 _INEnd connects.

Transceiver module 30 is integrated package LMX3162, and signal forwarding module 13 is integrated package 89C51, and transceiver mode switch switching circuit 31 is an integrated package 2436400.

Node interrogating signal generative circuit 28 has the 8421BCD scrambler of some parallel connections, and its input termination is provided with button group and trigger pulse, the D of its output terminated serial output processing circuit 29 and CT74LS199 chip ₀-D ₇End, the Q of chip _A, Q ₇-Q.Pin meets gate circuit G ₇, SH, the CD pin meets gate circuit G ₂, G ₂End input negative pulse enabling signal, G ₁And G ₂Output terminal output also-string converts marking signal S, CT74LS199 chip output serial data is to the DATAIN end of transceiver module 30.

Main frame 4 comprises microwave receiving main frame 37, the network switch 38 and central processing host 39, in the housing 40 of central processing host 39 wherein processing main plate 41 is arranged, central processing unit 50 and storer 51,52, network interface card 47, video card 48 are arranged on the mainboard 41, external connection keyboard/mouse data interface circuit 49 connects, network interface card 47 is connected with the network switch 38 by interface 43, and the network switch 38 is connected with microwave receiving main frame 37 or/and forwarding module 32.

The inventive method comprises the steps:

(1) token device is issued the vehicle driver when vehicle enters the portal monitoring station, requirement is arranged on the non-screening-off position of microwave signal, the license plate number of this token device numbering and vehicle is entered into this host computer system vehicle by the porch staff and enters registration form, and be transferred to the main frame of other each monitoring station of access network with broadcast mode by computer network

(2) by certain spacing node transmitting-receiving device is set along all wagon flow directions of highway; The inquiry signal generating circuit of node transmitting-receiving device is under the clock signal effect; Its digitally encoded signal circuit for generating produces a group coding signal; The identification code of setting when this signal can the employing system be installed; Under the control of serial output processing circuit, output to successively the signal transmitting and receiving module and finish the signal modulation; Formation can be for the node inquiry signal of emission; Be transmitted into covering the node forms by the microwave signal and inquiring the signal trigger region of setting by antenna

(3) token device is in duty to be received before not receiving interrogating signal, when vehicle enters node inquiry trigger region, after token device receives the node interrogating signal, at first by 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 SD termination of trigger circuit causes the output terminal Q of trigger to produce a trigger pip after receiving this level signal, trigger its coding generative circuit work once, the coding generative circuit will generate a string block code character with uniqueness, coded string is under the control of serial output circuit, by by upper byte to the order of low byte character by character the input signal transceiver module finish signal modulation process, and send emitting antenna outwards to launch, finish the reply registration work of vehicle thus, in case finish the signal emission to current monitoring node R-T unit, the upset of transceiver mode circuit state battle makes token device be in interrogating signal and receives duty

(4) after the node R-T unit received the answer signal of token in the vehicle, the coded data after the signal transmitting and receiving module is with token answer signal demodulation process synthesized with this node numbering and transmits data to each host computer system transmission of network,

(5) host computer system is installed on each speed of a motor vehicle Surveillance center or toll station, and 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 transmit piecemeal until arriving each the host computer system microwave receiving main frame and the network switch through the microwave transmission base station also finally to enter host computer system,

(6) each monitoring station host computer system constantly collects each vehicle from the network switch and replys register information when passing through each node, deposits memory device and harddisk storage device after treatment in; As calculated, analysis module handles, and obtains the travel speed of each vehicle at different running sections, and the standard of the limited speed of speed and this section judges whether it violating the regulations thus,

(7) when vehicle arrives the outlet monitoring station, this station staff accesses this vehicle token register information that is transferred to from the portal monitoring station in this station host from system host, this register information mark is cancelled the monitoring identification information be transferred to the host computer system of other each porch of access network with broadcast mode, the All hosts of total system is cancelled the prison state of this car by computer network.

After system host is received new token coded data and node serial number that transmit from the node R-T unit in the system step of the present invention (6), if node serial number belongs to other outlet tiny node, then main frame is nullified it from our station on-line monitoring vehicle table, if belong to the online control vehicle that faces in station, then get system time as this car reporting for work the time at present node, with this car node number of reporting for work, reply vehicle identification number, token number records main frame " vehicle ' situation record sheet " file together, system host reads the distance in this interval from " monitoring section definition information table " file, calculating vehicle travels institute's time spent in this interval, calculate this car overall speed and relevant license plate number, token number, interval number, vehicle is from this interval start node departure time, terminal node registers to " speed of a motor vehicle reckoner " file time of arrival together, switch to next computation interval, if interval break bounds then return if there is not break bounds, then continues to calculate the speed of a motor vehicle of next computation interval car.

Operating personnel determine the vehicle object, system determines current monitoring calculation interval, reads this car in this interval travel speed from speedometer, reads this interval vehicle-speed limit standard, inserting this car if this car exceeds the speed limit at " vehicle ' monitoring form " should the interval hypervelocity indicate, switch to down between monitoring section,, then be directly switch to down between monitoring section if do not surpass, if interval break bounds, then return,, then analyze this car and whether exceeding the speed limit between monitoring section down if do not have.

Method of the present invention and device can not influenced by weather condition, the speed of a motor vehicle of the omnidistance monitoring motor vehicle of all-weather, and monitoring range is wide, can effect a radical cure the automobile overspeed phenomenon, and system's construction cost is low.

Description of drawings:

Fig. 1 is a system chart of the present invention.

Fig. 2 is the token device 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 coded signal generation circuit bank synoptic diagram.

Figure 12 is a train of signal line output treatment circuit schematic diagram.

Figure 13 is the signal transmitting and receiving module map.

Figure 14 is the token device circuit theory diagrams.

Figure 15 is node R-T unit circuit theory diagrams.

Figure 16 is at road vehicles registration process process flow diagram.

Figure 17 is at road vehicles data acquisition flow figure.

Figure 18 is at road vehicles speed of a motor vehicle computing process flow diagram.

Figure 19 is an over-speed vehicles analyzing and processing process flow diagram.

Figure 20 is the data structure show table.

Figure 21 generates 2 system instruction cards of example for the token numbering.

Figure 22 exports the digital signal waveform instruction card successively for the coding generative circuit

Embodiment:

System of the present invention adopts a kind of special token device 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 token device 1 transmitting node inquiry (microwave) signal 5, and token device 1 is numbered (microwave) signals 6 as answer signal to node R-T unit 2 emission tokens after receiving the node interrogating signal.

System architecture of the present invention is referring to accompanying drawing 1, and token formula highroad vehicle speed monitoring system constitutes synoptic diagram.Wherein:

The 1=token device.It is the front end signal generator that this patent system and monitored motor vehicles use with car.Triggered by the node interrogating signal when vehicle process monitoring node and send answer signal to system, the current location of vehicle is judged with this by system.

2=node R-T unit.Be used to produce token that the system interrogation signal enters monitoring node with triggering and finish once and reply, and receive the token number information of launching when token is replied.

The 3=signal transmission network.Can be wireless transmission net or cable transmission network, be used for the token response message that node is received and be transferred to each monitoring station or charge station's host computer system.

The 4=host computer system.Finish network signal and receive the conversion storage, the operation special software is to finish speed of a motor vehicle monitoring and management.

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 token in the vehicle makes it produce answer signal in the entering signal district in order to trigger.

6=token numbering 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 unique number of token self.

Token device 1 has a shockproof dustproof housing 7, and the lampet 8 of an indication power supply status and the lampet 9 of an indicator signal emission state are arranged on the housing; There are a battery 11 and corresponding power circuit 12 to provide required working power in the housing for whole token device; 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 token coded signal 6; The RX of transceiver mode switch switching circuit [18] _OUTThe RX of line and signal transmitting and receiving module 13 _INThe continuous node interrogating signal [5] that is used for receiving of pin imports token, TX into _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 token 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 are formed; One group of digital encoding signal generating circuit 16 and signal generation parts of forming by train of signal line output treatment circuit 17 that enter duty after triggered by trigger unit,

These generation parts provide the DATA IN pin that the numbering signal of this token sends into transceiver module 13 and handle rearward-facing antennas through transceiver module 13 and send tokens numbering signals 6.

Token device 1 structure is referring to accompanying drawing 2 wherein:

5=node interrogating signal.

6=token numbering signal.

The 7=token enclosure.

The 8=indicator of the power supply status.Join with power supply, normally whether indication power supply power supply.

9=emission state pilot lamp.Join with the RSSI pin of transceiver module 13, indicator signal receives and the emission duty.

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.

The 13=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 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 token coded signal as the input of token coded signal with train of signal line output treatment circuit 17.The circuit theory diagrams of transceiver module are referring to accompanying drawing 6 " circuit theory diagrams of transceiver module ".

14=node interrogating signal comparator circuit.Finish the comparison between the systematic identification code that interrogating signal is encoded and token is set.Circuit theory is referring to accompanying drawing 7 " encoding ratio is than circuit theory diagrams ".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 13RX _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 produce 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 " trigger circuit schematic diagram ".Among the figure, R _DS _DTwo input ends, wherein R for trigger _DFor directly putting 0 end, S _DFor directly putting 1 end QQ 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 16 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 token coded signal.

16=coded signal generation circuit bank.Finish the generation of token or node transponder system identification.Circuit theory is referring to accompanying drawing 10 " coded signal generation circuit theory diagrams ".Adopt 8421BCD sign indicating number coding principle in the schematic diagram, ' 0 '～' 9 ' digital signal is converted to 2 corresponding carry system code signals, by Y ₃Y ₂Y ₁Y ₀Expression.The output of circuit will be as the D end input of the train of signal line output treatment circuit 17 of next stage.The codimg logic that is adopted can be expressed as following expression formula:

${\mathrm{<figure-callout\; id="3"\; label="Y"\; filenames="A200410021798.400221.png,A200410021798.400311.png"\; state="\{\{state\}\}">Y</figure-callout>}}_3=\stackrel{\&OverBar;}{\stackrel{\&OverBar;}{{\mathrm{<figure-callout\; id="8"\; label="D"\; filenames="A200410021798.400221.png,A200410021798.400311.png"\; state="\{\{state\}\}">D</figure-callout>}}_8}\&CenterDot;\stackrel{\&OverBar;}{{\mathrm{<figure-callout\; id="9"\; label="D"\; filenames="A200410021798.400311.png"\; state="\{\{state\}\}">D</figure-callout>}}_9}}{={\mathrm{<figure-callout\; id="8"\; label="D"\; filenames="A200410021798.400221.png,A200410021798.400311.png"\; state="\{\{state\}\}">D</figure-callout>}}_8+\mathrm{<figure-callout\; id="9"\; label="D"\; filenames="A200410021798.400311.png"\; state="\{\{state\}\}">D</figure-callout>}}_9$

${\mathrm{<figure-callout\; id="2"\; label="Y"\; filenames="A200410021798.400311.png"\; state="\{\{state\}\}">Y</figure-callout>}}_2=\stackrel{\&OverBar;}{\stackrel{\&OverBar;}{{\mathrm{<figure-callout\; id="4"\; label="D"\; filenames="A200410021798.400311.png"\; state="\{\{state\}\}">D</figure-callout>}}_4}\&CenterDot;\stackrel{\&OverBar;}{{\mathrm{<figure-callout\; id="5"\; label="D"\; filenames="A200410021798.400211.png,A200410021798.400241.png"\; state="\{\{state\}\}">D</figure-callout>}}_5}\&CenterDot;\stackrel{\&OverBar;}{{\mathrm{<figure-callout\; id="6"\; label="D"\; filenames="A200410021798.400311.png"\; state="\{\{state\}\}">D</figure-callout>}}_6}\&CenterDot;\stackrel{\&OverBar;}{{\mathrm{<figure-callout\; id="7"\; label="D"\; filenames="A200410021798.400311.png"\; state="\{\{state\}\}">D</figure-callout>}}_7}}={\mathrm{<figure-callout\; id="4"\; label="D"\; filenames="A200410021798.400311.png"\; state="\{\{state\}\}">D</figure-callout>}}_4+{\mathrm{<figure-callout\; id="5"\; label="D"\; filenames="A200410021798.400211.png,A200410021798.400241.png"\; state="\{\{state\}\}">D</figure-callout>}}_5+{\mathrm{<figure-callout\; id="6"\; label="D"\; filenames="A200410021798.400311.png"\; state="\{\{state\}\}">D</figure-callout>}}_6+{\mathrm{<figure-callout\; id="7"\; label="D"\; filenames="A200410021798.400311.png"\; state="\{\{state\}\}">D</figure-callout>}}_7$

${\mathrm{<figure-callout\; id="1"\; label="Y"\; filenames="A200410021798.400221.png,A200410021798.400261.png"\; state="\{\{state\}\}">Y</figure-callout>}}_1=\stackrel{\&OverBar;}{\stackrel{\&OverBar;}{{\mathrm{<figure-callout\; id="2"\; label="D"\; filenames="A200410021798.400311.png"\; state="\{\{state\}\}">D</figure-callout>}}_2}\&CenterDot;\stackrel{\&OverBar;}{{\mathrm{<figure-callout\; id="3"\; label="D"\; filenames="A200410021798.400221.png,A200410021798.400311.png"\; state="\{\{state\}\}">D</figure-callout>}}_3}\&CenterDot;\stackrel{\&OverBar;}{{\mathrm{<figure-callout\; id="6"\; label="D"\; filenames="A200410021798.400311.png"\; state="\{\{state\}\}">D</figure-callout>}}_6}\&CenterDot;\stackrel{\&OverBar;}{{\mathrm{<figure-callout\; id="7"\; label="D"\; filenames="A200410021798.400311.png"\; state="\{\{state\}\}">D</figure-callout>}}_7}}={\mathrm{<figure-callout\; id="2"\; label="D"\; filenames="A200410021798.400311.png"\; state="\{\{state\}\}">D</figure-callout>}}_2+{\mathrm{<figure-callout\; id="3"\; label="D"\; filenames="A200410021798.400221.png,A200410021798.400311.png"\; state="\{\{state\}\}">D</figure-callout>}}_3+{\mathrm{<figure-callout\; id="6"\; label="D"\; filenames="A200410021798.400311.png"\; state="\{\{state\}\}">D</figure-callout>}}_6+{\mathrm{<figure-callout\; id="7"\; label="D"\; filenames="A200410021798.400311.png"\; state="\{\{state\}\}">D</figure-callout>}}_7$

$Y_0=\stackrel{\&OverBar;}{\stackrel{\&OverBar;}{{\mathrm{<figure-callout\; id="1"\; label="D"\; filenames="A200410021798.400221.png,A200410021798.400261.png"\; state="\{\{state\}\}">D</figure-callout>}}_1}\&CenterDot;\stackrel{\&OverBar;}{{\mathrm{<figure-callout\; id="3"\; label="D"\; filenames="A200410021798.400221.png,A200410021798.400311.png"\; state="\{\{state\}\}">D</figure-callout>}}_3}\&CenterDot;\stackrel{\&OverBar;}{{\mathrm{<figure-callout\; id="5"\; label="D"\; filenames="A200410021798.400211.png,A200410021798.400241.png"\; state="\{\{state\}\}">D</figure-callout>}}_5}\&CenterDot;\stackrel{\&OverBar;}{{\mathrm{<figure-callout\; id="7"\; label="D"\; filenames="A200410021798.400311.png"\; state="\{\{state\}\}">D</figure-callout>}}_7}\&CenterDot;\stackrel{\&OverBar;}{{\mathrm{<figure-callout\; id="9"\; label="D"\; filenames="A200410021798.400311.png"\; state="\{\{state\}\}">D</figure-callout>}}_9}}={\mathrm{<figure-callout\; id="1"\; label="D"\; filenames="A200410021798.400221.png,A200410021798.400261.png"\; state="\{\{state\}\}">D</figure-callout>}}_1+{\mathrm{<figure-callout\; id="3"\; label="D"\; filenames="A200410021798.400221.png,A200410021798.400311.png"\; state="\{\{state\}\}">D</figure-callout>}}_3+{\mathrm{<figure-callout\; id="5"\; label="D"\; filenames="A200410021798.400211.png,A200410021798.400241.png"\; state="\{\{state\}\}">D</figure-callout>}}_5+{\mathrm{<figure-callout\; id="7"\; label="D"\; filenames="A200410021798.400311.png"\; state="\{\{state\}\}">D</figure-callout>}}_7+{\mathrm{<figure-callout\; id="9"\; label="D"\; filenames="A200410021798.400311.png"\; state="\{\{state\}\}">D</figure-callout>}}_9$

17=train of signal line output treatment circuit.The numerical coding sequence signal of importing that is used for walking abreast becomes the serial output signal.Train of signal line output treatment circuit principle is referring to accompanying drawing 12 " train of signal line output treatment circuit schematic diagram ".CT74LS199 chip wherein is at gate circuit G ₁And G ₂Under the control action, with D ₇D ₆D ₅D ₄D ₃D ₂D ₁D ₀Be converted to the serial output signal, send into the DATA IN pin of signal transmitting and receiving module 13 and after its signal modulation processing and amplifying the answer signal as this token send to the node retransmission unit.

18=transceiver mode switch switching circuit.The conversion of the signal reception of control token device and two kinds of mode of operations of signal emission.Circuit theory is referring to accompanying drawing 5 " transceiver mode switch switching circuit schematic diagram ".Circuit adopts " 2,436,400 1 " 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 input high level, chip is in sending mode, and the radiofrequency signal of token radiating circuit is from TX _INAntenna is introduced and be sent to pin; When TX/RX pin input low level, chip is 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 a token 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 token 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 token numbering signal forwarding processing module 32 that pin links to each other finish receive the token 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.

Node R-T unit 2 structures are referring to accompanying drawing 3 wherein:

5=node interrogating signal

6=token numbering 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 11.

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 and the answer signal forwarding module 32RX of received signal _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.

31=answer signal forwarding module.Adopt programmable single chip computer chip 89C51.Finish the access of token 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.

Line transmission system 3 adopts traditional computer network transmission mechanism, and wireless transmitting system adopts traditional microwave transmission mechanism.

Host computer system 4 comprises a cover microwave signal centralized processor 37, the cover network switch 38 and a central processing host 39.Microwave signal centralized processor 37 can adopt common microwave 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 common microwave 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 speed analyzing special software 53 is installed in the hard disk parts (HD) 52, finishing all registers at road vehicles, the data acquisition of monitored vehicle position information, overall speed calculates, functions such as the interval hypervelocity of vehicle analysis.

The host computer system structure is referring to accompanying drawing 4 wherein:

37=microwave 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, token device issues the vehicle drive personnel when vehicle enters monitoring inlet or toll station, requires to be placed on the non-screening-off position of microwave signal in the monitored vehicle.This token numbering is entered into this host computer system with the license plate number information of vehicle by porch monitoring host computer system staff, this information is transferred to the host computer system of other each porch of access network immediately by computer network, so that this information of vehicles can both be seen and use by all monitoring stations of system or charge station's host computer system.When vehicle arrives outlet measuring station or charge station's outlet, this vehicle machine token register information in this station staff accesses before from the access station system transmissions to this station host from system, to this register information mark " cancelling monitoring " status indicator, to finish outlet registration to this vehicle, thereafter, host computer system is transferred to the host computer system of other each porch of access network by computer network with broadcast mode with " cancelling monitoring " status indicator information of this car, 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 all wagon flow directions of highway by the certain spacing layout and be fixedly mounted on the highway monitoring point to form monitoring net.The interrogation signal transmission processing element of node R-T unit makes digitally encoded signal generation circuit constantly produce a group coding signal under the clock signal effect, this signal can adopt systematic identification code and set before system installs, 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, token device is in duty to be received before not receiving interrogating signal.When vehicle enters the node interrogation zone, after token device 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 generative circuit work once, the coding generative circuit will generate a string block code character with uniqueness, coded string is under the control of serial output circuit, by by upper byte to the order of low byte character by character the input signal transceiver module finish signal modulation process, and send emitting antenna outwards to launch, by

This finishes the reply registration work of vehicle to current monitoring node.In case finish the signal emission, transceiver mode on-off circuit state turnover makes token be in interrogating signal and receives duty.

4, after the node R-T unit received the answer signal of token in the vehicle, the coded data after the signal transmitting and receiving module is with token answer signal demodulation process synthesized with this node numbering and transmits data to each host computer system transmission of network.

5, host computer system is installed on each speed of a motor vehicle Surveillance center or toll station.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 transmit piecemeal until arriving each the host computer system microwave receiving main frame and the network switch and finally entering host computer system through the microwave transmission base station.

6, the special software of each monitoring station host computer system constantly collects each vehicle from the network switch and replys register information when passing through each node, deposits memory device and harddisk storage device after treatment in; As calculated, analysis module is handled, obtain the travel speed of each vehicle in different running sections (interval), and the standard of the limited speed of speed and this section is judged the cruising of vehicle or is driven over the speed limit thus, and this judged result provides the monitoring management personnel foundation as speed of a motor vehicle management.

It is the background process center of system that the special software of system is handled, and installs and runs in each measuring station or the charge station's host computer system.Data by computer network pass mutually, make special software work compound between multi-host system of patent system, the monitoring task of finishing that cooperatively interacts.Special software mainly contain vehicle when entering monitoring station or charge station token issue information registering and network delivery module, vehicle pass through each monitoring node to system send the automatic data collection processing module of response message, to each monitoring section of each motor vehicles of monitoring section between (node is between another node) the automatic computing module of travel speed and analysis and processing module that monitor vehicle is driven over the speed limit etc.For better understanding the operational detail of this patent system, the processing logic of each module is described as follows.

The vehicle monitoring state of cancelling registration process two parts when information of vehicles Registration Module wherein is included in and enters monitoring section registration process and vehicle when issuing token when vehicle enters monitoring inlet or toll station and be about to withdraw from the monitoring section outlet and reclaim token.Entering monitoring section registration process logic is: after determining that by system operators will increase a vehicle enters recorded information, enter the license plate number of vehicle, the token number of this car that issues by operating personnel's input, system records vehicle automatically with input information and enters in the registration form file, the information such as being about to license plate number, token number, access station numbering, the enrollment time that enters the mouth of existing side by side are transferred to the host computer system of other monitoring stations or charge station 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 is about to withdraw from monitoring section outlet recovery token is: when vehicle arrives outlet measuring station or charge station's outlet, this vehicle machine token register information in this station staff accesses before from the access station system transmissions to this station host from system, to this register information mark " cancelling monitoring " status indicator, to finish outlet registration to this vehicle, thereafter, host computer system is transferred to " cancelling monitoring " status indicator information of this car the host computer system of other each porch of access network by computer network.The host computer system special software of this patent in road vehicles registration process logic referring to accompanying drawing 16.

The processing logic of data acquisition module wherein is: receiving from Network Transmission during from token numbering data of certain node R-T unit, whether the numbering of analyzing this node immediately belongs to the Egress node at another outlet station, be not, can judge that this car is in the cruising way, then obtain the host computer system current time, record in " vehicle ' situation record sheet " file with replying license plate number, token 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 17.

The overall speed analyzing and processing of host computer system special software wherein is to finish the collection of vehicle response message and data recording is carried out immediately in system behind " vehicle ' situation record sheet " file.System reads the distance in this interval from " monitoring section definition information table " earlier, calculate vehicle travel in this interval the institute take time, go out this car overall speed according to zone distance and Time Calculation, register to " speed of a motor vehicle reckoner " file together from parameters such as this interval start node departure time, terminal node time of arrival with relevant license plate number, token number, interval number and vehicle.The overall speed analyzing and processing logic of host computer system special software of the present invention is referring to accompanying drawing 18.

The interval hypervelocity of the vehicle of host computer system special software wherein analyzing and processing is that the user starts operation when needing.System reads zone distance from " speed of a motor vehicle reckoner " file earlier, and read this interval standard of the limited speed from " monitoring section definition information table ", judge according to this whether vehicle exceeds the speed limit, if hypervelocity, calculate the hypervelocity quantity and the ratio that transfinites, count again in this record of " speed of a motor vehicle reckoner " file and the relevant field of hypervelocity, and call " processing of overspeed warning picture " and on computer screen, demonstrate overspeed of vehicle and warn picture; Then switch to and repeat aforementioned calculation and processing between next monitoring section, so circulation is with the overspeed situation multianalysis and the processing of vehicle ' whole process.The interval hypervelocity of the vehicle of host computer system special software of the present invention analyzing and processing logic is referring to accompanying drawing 19.

The data structure of host computer system special software wherein is referring to accompanying drawing 20.

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 token device 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

System interrogation signal: produce by the node R-T unit,, receive by token 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 8 system baseband signals that are output as a group (4 characters) and line output through its coding 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;

● token device 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 token device comparator circuit, and 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.

● token answer signal: produce by token device,, 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 token by the status switch value of the code switch group of token device inner setting, handle the 2 system baseband signals that are output as a group (8 characters) and line output through its coding generative circuit;

● this signal is become the baseband signal of serial output by parallel input under the control of token device sequential 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 token radiofrequency signal described above (token answer 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, token 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 token 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.

Token device 1 adopts the LMX3162 integrated chip of National company in the present embodiment, and this token device 1 frequency of operation is 2.4GHz.Basic circuit structure is referring to accompanying drawing 12.The circuit working principle is: node interrogating signal 5 is by the RX of LMX3162 signal transceiver module _INPin enters, and passes through RX after demodulation process _OUTPin outputs to the coding comparator circuit, under the shift pulse effect, signal waveform is sent in each register of shift register group one by one, data in this register are divided into groups and are compared by turn by per 4 one group in CT7485 comparator stage joint group closes with the coded data of the system banner coding circuit output of setting in advance, when all data all conform to, the P=Q end of comparator circuit afterbody will be exported ' 1 ' level, and this level will be as trigger R _DInput causes trigger pulse of trigger output terminal Q output, this pulse will trigger the coding of setting the sign indicating number coding circuit and generate operation, this pulse simultaneously will be delivered to the RX/TX pin of signal switching circuit, be turned to " emission state " to drive this circuit from " accepting state ".Finish reception, conversion and the comparison process of node interrogating signal thus;

Under the trigger pulse effect, represent the coded signal of this token numbering in the setting code generation circuit of forming by 8 8421 scramblers, to produce for one group, this setting sign indicating number is divided into 4 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 is sent into data the DATA of signal transceiver one by one _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 all data-switching.When the work of afterbody CT744LS199 parallel-serial converter 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 token device LMX3612 chip DATA _INThe data of pin serial input are through the signal modulation process of token device, from TX _OUTPin output is launched to antenna through on-off circuit.

Node R-T unit 2 adopts the LXM3162 integrated chip of National company in the present embodiment, and these node R-T unit 2 frequency of operation are 2.4GHz; The signal forwarding module adopts the 89C51 single-chip microcomputer.Basic circuit structure is referring to accompanying drawing 13.The circuit working principle is:

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 is sent into data the DATA of signal transceiver one by one _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.

Token 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 token 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, token 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=' 6789 '.

2, the token numbering is different, adopts 8 characters long, and its inner coding that produces and launch adopts the coding identical with the token printed codes.As " 98765432 " etc.

3, nodes encoding adopts 4 codings in order to distinguish different monitoring nodes, as ' 1006 ', ' 1032 ' etc.

4, host computer system coding adopts 2 codings in order to distinguish different monitoring stations and toll station, as ' 16 ', ' 12 ' 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 token that is encoded to ' 98765432 ' is launched when node is replied is ' 98765432 '.The nodes encoding of supposing the vehicle process is ' 1033 ', after this node R-T unit receives this coding, synthetic this node Monitoring Data: a string node coding+this token number information ' 103398765432 ', 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 ' 1034 ' node, the data that this node sent were ' 103498765432 '.

Claims (10)

1, token formula speed of a motor vehicle monitoring system, it is characterized in that token device (1) is positioned at non-shielding place of microwave on the motor vehicle, device by antenna (10) and connected reception interrogating signal (5) and transmit coded signals (6) constitutes, node R-T unit (2) be positioned at highway along the line on, be made of the device of antenna (25) and received encoded signal (6) and the device of emission interrogating signal (5), the device of received encoded signal (6) is transported to coded signal (6) system host (4) that is positioned at each monitoring station by transmission system (3).

2, system according to claim 1, it is characterized in that in the housing of token device (1) power circuit (11) and the transceiver mode switch switching circuit (18) that is connected with built-in omnidirectional antenna (10) being arranged, the input end (RX of commutation circuit output and signal transmitting and receiving module (13) _IN) connect, the commutation circuit input end is by the output terminal (TX of power amplifier and transceiver module (13) _OUT) connect the output terminal (RX of signal transmitting and receiving module (13) _OUT) successively by signal comparator circuit (14), trigger circuit (15), coded signal generation circuit (16), train of signal line output treatment circuit (17) input end (DATA with transceiver module (13) _IN) connect.

3, system according to claim 2, it is characterized in that signal comparator circuit (14) produces circuit (56) and forms the RX of the 1D termination transceiver module (13) of the registers group of treatment circuit (54) by sealing in and going out shifting processing circuit (54), comparator circuit (55) and systematic identification code _OUTEnd, the output terminal of registers group (1D) step-by-step meet the corresponding input end (P of the digital comparer of corresponding tandem type of comparator circuit (55) ₀, P ₁, P ₂, P ₃) pin, the input end (Q of comparer ₀, Q ₁, Q ₂, Q ₃) the pin output of each scrambler of connection circuit (56) respectively, the scrambler input connects button group and trigger pulse is set, cross-linked two rejection gates of the output terminal contact Power Generation Road (15) of comparer or the input end R of two Sheffer stroke gates _DThe output of gate circuit connects the input end of the scrambler of coded signal generation circuit (16), the output of scrambler connects the input of the CT74LS199 chip of train of signal line output treatment circuit (17), and the output of chip connects the DATAIN pin of signal transmitting and receiving module (13), and the SH of chip, CD pin meet gate circuit (G ₂), Q _A, Q ₇-Q.Pin meets gate circuit (G ₁), G ₁, G ₂Output terminal connect and to send and to go here and there the complement mark signal.

4, system according to claim 1 is characterized in that node R-T unit (2) has power circuit (27) and the transceiver mode switch switching circuit (31) that is connected with antenna (25), commutation circuit (31) RX _OUTThe RX of end and signal transmitting and receiving module (30) _INEnd connects, commutation circuit (31) TX _INEnd is through the TX of a power amplifier and transceiver module (30) _OUTEnd connects, the RX of transceiver module (30) _OUTThe RX of end and answer signal forwarding module (32) _INEnd connects, the RX of forwarding module (32) _OUTEnd is connected with system host (4) by transmission system (3), and the output of node interrogating signal generative circuit (28) is connected with serial output processing circuit (29), the DATA of the output of circuit (29) and transceiver module (30) _INEnd connects.

5, system according to claim 4 is characterized in that transceiver module (30) is integrated package LMX3162, and signal forwarding module (13) is integrated package 89C51, and transceiver mode switch switching circuit (31) is an integrated package 2436400.

6, system according to claim 4, it is characterized in that node interrogating signal generative circuit (28) has the 8421BCD scrambler of some parallel connections, its input termination is provided with button group and trigger pulse, the D of its output terminated serial output processing circuit (29) and CT74LS199 chip ₀-D ₇End, the Q of chip _A, Q ₇-Q.Pin meets gate circuit (G ₇), SH, the CD pin meets gate circuit (G ₂), (G ₂') end input negative pulse enabling signal, G ₁And G ₂Output terminal output also-string converts marking signal S, CT74LS199 chip output serial data is to the DATAIN end of transceiver module (30).

7, system according to claim 1 is characterized in that main frame (4).Comprise microwave receiving main frame 37, the network switch 38 and central processing host 39, in the housing 40 of central processing host 39 wherein processing main plate 41 is arranged, central processing unit (50) and storer (51), (52), network interface card (47), video card (48) are arranged on the mainboard 41, external connection keyboard/mouse data interface circuit (49) connects, network interface card (47) is connected with the network switch (38) by interface (43), and the network switch (38) is connected with microwave receiving main frame (37) or/and forwarding module (32).

8, token formula speed of a motor vehicle monitoring method comprises the steps:

(1) token device is issued the vehicle driver when vehicle enters the portal monitoring station, requirement is arranged on the non-screening-off position of microwave signal, the license plate number of this token device numbering and vehicle is entered into this host computer system vehicle by the porch staff and enters registration form, and be transferred to the main frame of other each monitoring station of access network with broadcast mode by computer network

(2) by certain spacing node transmitting-receiving device is set along all wagon flow directions of highway; The inquiry signal generating circuit of node transmitting-receiving device is under the clock signal effect; Its digitally encoded signal circuit for generating produces a group coding signal; The identification code of setting when this signal can the employing system be installed; Under the control of serial output processing circuit, output to successively the signal transmitting and receiving module and finish the signal modulation; Formation can be for the node inquiry signal of emission; Be transmitted into covering the node forms by the microwave signal and inquiring the signal trigger region of setting by antenna

(3) token device is in duty to be received before not receiving interrogating signal, when vehicle enters node inquiry trigger region, after token device receives the node interrogating signal, at first by 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 SD termination of trigger circuit causes the output terminal Q of trigger to produce a trigger pip after receiving this level signal, trigger its coding generative circuit work once, the coding generative circuit will generate a string block code character with uniqueness, coded string is under the control of serial output circuit, by by upper byte to the order of low byte character by character the input signal transceiver module finish signal modulation process, and send emitting antenna outwards to launch, finish the reply registration work of vehicle thus, in case finish the signal emission to current monitoring node R-T unit, the upset of transceiver mode circuit state battle makes token device be in interrogating signal and receives duty

(4) after the node R-T unit received the answer signal of token in the vehicle, the coded data after the signal transmitting and receiving module is with token answer signal demodulation process synthesized with this node numbering and transmits data to each host computer system transmission of network,

(5) host computer system is installed on each speed of a motor vehicle Surveillance center or toll station, and 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 transmit piecemeal until arriving each the host computer system microwave receiving main frame and the network switch through the microwave transmission base station also finally to enter host computer system,

(6) each monitoring station host computer system constantly collects each vehicle from the network switch and replys register information when passing through each node, deposits memory device and harddisk storage device after treatment in; As calculated, analysis module handles, and obtains the travel speed of each vehicle at different running sections, and the standard of the limited speed of speed and this section judges whether it violating the regulations thus,

(7) when vehicle arrives the outlet monitoring station, this station staff accesses this vehicle token register information that is transferred to from the portal monitoring station in this station host from system host, this register information mark is cancelled the monitoring identification information be transferred to the host computer system of other each porch of access network with broadcast mode, the All hosts of total system is cancelled the prison state of this car by computer network.

9, systems approach according to claim 8, after it is characterized in that system host in the step (6) is received new token coded data and node serial number that transmit from the node R-T unit, if node serial number belongs to other outlet tiny node, then main frame is nullified it from our station on-line monitoring vehicle table, if belong to station on-line monitoring vehicle, then get system time as this car reporting for work the time at present node, with this car node number of reporting for work, reply vehicle identification number, token number records main frame " vehicle ' situation record sheet " file together, system host reads the distance in this interval from " monitoring section definition information table " file, calculating vehicle travels institute's time spent in this interval, calculate this car overall speed and relevant license plate number, token number, interval number, vehicle is from this interval start node departure time, terminal node registers to " speed of a motor vehicle reckoner " file time of arrival together, switch to next computation interval, if interval break bounds then return, if there is not break bounds, then continue to calculate the speed of a motor vehicle of next computation interval car.

10, method according to claim 9, it is characterized in that operating personnel determine the vehicle object, system determines current monitoring calculation interval, read this car in this interval travel speed from speedometer, read this interval vehicle-speed limit standard, inserting this car if this car exceeds the speed limit at " vehicle ' monitoring form " should the interval hypervelocity indicate, switch to down between monitoring section, if do not exceed the speed limit, then be directly switch to down between monitoring section, if interval break bounds then returns, if whether no, then analyze this car is exceeding the speed limit between monitoring section down.

Images