CN2693552Y - Token type vehicle speed monitoring and testing system - Google Patents

Token type vehicle speed monitoring and testing system Download PDF

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Publication number
CN2693552Y
CN2693552Y CN 200420032805 CN200420032805U CN2693552Y CN 2693552 Y CN2693552 Y CN 2693552Y CN 200420032805 CN200420032805 CN 200420032805 CN 200420032805 U CN200420032805 U CN 200420032805U CN 2693552 Y CN2693552 Y CN 2693552Y
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circuit
signal
output
pin
token
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甘国工
刘学明
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Abstract

The utility model relates to a token type vehicle speed monitoring and testing system and the method thereof. A token device arranged at the nonshielded point of the motor vehicle comprises antennae (10), a device which receives request signals (5) and a device which transmits encoded signals(6). The node transmitter receiver device(2) positioned on the path of the highway comprises antennae (25), a device which receives the encoded signals and a device which transmits the request signals. The device which receives the encoded signals(6) can transport the encoded signals (6) to the host computer (4) in the individual monitoring station through the transmission system (3).

Description

Token formula speed of a motor vehicle monitoring system
Technical field:
The utility model and a kind of on-highway motor vehicle monitoring system of driving over the speed limit is relevant.
Background technology:
It is the chief culprit who causes traffic accident that power actuated vehicle is driven over the speed limit, and how effectively controlling driving over the speed limit of vehicle in express way is the important subject of safety traffic.The product that is widely used in an on-highway motor vehicle moving velocity 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 climatic 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 power actuated vehicle 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 utility model:
The purpose of this utility model provides a kind of token formula speed of a motor vehicle monitoring system that can carry out omnidistance formula speed monitoring to vehicle.
The utility model is achieved in that
The utility model token formula speed of a motor vehicle monitoring system, token device 1 is positioned at non-shielding place of microwave on the self-propelled vehicle, device by antenna 10 and connected reception interrogation signal 5 and transmit coded signals 6 constitutes, node transmit receive 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 interrogation signal 5, the device of received encoded signal 6 is transported to code signal 6 system host 4 that is positioned at each monitoring station by transmission system 3.
Have in the housing of token device 1 power circuit 11 and with built-in omnidirectional antenna 10 bonded assembly transceiver mode switch switching circuit 18, the input end RX of commutation circuit output and signal transmitting and receiving module 13 INConnect, the commutation circuit input end is by the mouth TX of power amplifier and transceiver module 13 OUTConnect the mouth RX of signal transmitting and receiving module 13 OUTPass through the input end DATA of signal comparator circuit 14, trigger circuit 15, code 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 register 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 mouth 1D step-by-step of register group meet the corresponding input end mouth P of the digital comparator of corresponding tandem type of comparator circuit 55 0, P 1, P 2, P 3Pin, the input end Q of comparator 0, Q 1, Q 2, Q 3Pin is the output of each coder of connection circuit 56 respectively, and the coder input connects button group and trigging pulse are set, cross-linked two joint denial gates of the mouth contact Power Generation Road 15 of comparator or the input end R of two NAND gate DThe output of gate circuit connects the input end of the coder of code signal generation circuit 16, the output of coder 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 2Mouth connect and to send and to go here and there the complement mark signal.
Node transmit receive unit 2 have power circuit 27 and with antenna 25 bonded assembly transceiver mode switch switching circuit 31, 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 acknowledge 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 interrogation 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 interrogation signal generative circuit 28 has the 8421BCD coder of some parallel connections, and its input termination is provided with button group and trigging 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 going pulse actuation signal, G 1And G 2Mouth 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 process unit 50 and memory device 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.
Method of the present utility model 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 the utility model system chart.
Fig. 2 is the token device constructional drawing.
Fig. 3 is a node transmit receive unit constructional 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 schematic circuit diagram.
Fig. 7 is a node interrogation 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 code signal generation schematic circuit diagram.
Figure 11 is a code signal generation circuit bank scheme drawing.
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 schematic circuit diagram.
Figure 15 is node transmit receive unit schematic circuit diagram.
The specific embodiment:
System of the present utility model adopts a kind of purpose made token device 1, a kind of node transmit receive unit 2, corresponding transmission system 3 and host computer system 4 to constitute complete disposal system.Wherein node transmit receive unit 2 is to token device 1 transmitting node inquiry (microwave) signal 5, and token device 1 is numbered (microwave) signals 6 as acknowledge signal to node transmit receive unit 2 emission tokens after receiving the node interrogation signal.
System architecture of the present utility model is referring to accompanying drawing 1.
Wherein:
The 1=token device.It is the front end signal producer that this patent system and monitored power actuated vehicle use with car.Triggered by the node interrogation signal when vehicle process monitoring node and send acknowledge signal to system, the current location of vehicle is judged with this by system.
2=node transmit receive 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 transmission over radio net or cable transmission network, be used for the token response message that node is received and be transferred to each monitoring station or toll 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 interrogation signal.By the system banner code of launching after being modulated into microwave signal that the node transmit receive unit sends, the token in the vehicle makes it produce acknowledge signal in the entering signal district in order to trigger.
6=token numbering signal.Be subjected to the node interrogation signal to trigger the acknowledge 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 antisoiling 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 operation work and forked working in the receiving condition of node interrogation 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 interrogation 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 interrogation signal comparator circuit 14, trigger circuit 15 are formed; One group of digital encoding signal generating circuit 16 and signal of being made up of train of signal line output treatment circuit 17 that enters mode of operation after triggered by trigger unit generates parts, and these generations parts provide the DATA IN pin that the numbering signal of this token sends into transceiver module 13 and handle rearward-facing antennas transmission tokens through transceiver module 13 and number signals 6.
Token device 1 structure is referring to accompanying drawing 2 wherein:
5=node interrogation 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 indicator lamp.Join with the RSSI pin of transceiver module 13, indicator signal receives and the emission mode of operation.
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 indicator lamp [9] connect so that signal condition demonstration level, GND pin ground connection, V to be provided DDThe input of pin power connection, RX OUTPin is connected with node interrogation 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 schematic circuit diagram of transceiver module are referring to accompanying drawing 6 " schematic circuit diagram of transceiver module ".
14=node interrogation signal comparator circuit.Finish the comparison between the systematic identification code that interrogation signal is encoded and token is set.Circuit theory is referring to accompanying drawing 7 " encoding ratio is than schematic circuit diagram ".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 interrogation 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 comparator 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 coder output Y of this coder group 0Y 1Y 2Y 3Insert the Q of the digital comparator corresponding input end of tandem type mouth respectively 0Q 1Q 2Q 3Pin; In the comparator circuit group each independently comparator adopt 4 bit comparators, bear the comparison of a character (4 2 ary codes), conforming to then, the P=Q mouth 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 incoming signal.
The 15=trigger circuit.Be used to produce an energizing signal.Circuit is to be made of two joint denial gates or two NAND gate cross-coupleds.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 binary pair DFor directly putting 0 end, S DFor directly putting 1 end QQ is two complementary output ends, Q=0 when Q=1; Binary pair is in 1 state during Q=1, and binary pair is in 0 state during Q=0.The R of binary pair DMouth 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, binary pair keeps normality, does not produce energizing signal; When systematic identification code comparator circuit output high level, R DHigh level causes binary pair to send trigging pulse, and this pulse will trigger code signal generation circuit bank 16 and produce one group of token coded signal.
16=code signal generation circuit bank.Finish the generation of token or node transponder system identification.Circuit theory is referring to accompanying drawing 10 " code signal generation schematic circuit diagram ".Adopt 8421BCD sign indicating number coding principle in the schematic diagram, ' 0 '～' 9 ' digital signal is converted to cooresponding 2 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:
Figure Y20042003280500083
17=train of signal line output treatment circuit.The digital 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 1With GUnder 2 control actions, 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 acknowledge signal as this token send to the node retransmission unit.
18=transceiver mode switch switching circuit.The conversion that control token device signal receives and signal is launched two kinds of mode of operations.Circuit theory is referring to accompanying drawing 5 " transceiver mode switch switching circuit schematic diagram ".Circuit adopts " 2436400---" switch chip.Its chips ANT I/OA pin and a day wire joint; 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 transmission 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 acceptor circuit.V DDBe the chip power input.
Node transmit receive 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 transmission over radio 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 interrogation 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 interrogation 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 acknowledge signal 6 is formed the signal transmitting and receiving parts thus; The node interrogation signal generation part that set of number formula code signal generation circuit 28 and train of signal line output treatment circuit 29 are formed is finished the generation of interrogation 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 with signal output to wire transmission interface 22 or transmission over radio interface 23 slots for unofficial biography.
Node transmit receive unit 2 structures are referring to accompanying drawing 3 wherein:
5=node interrogation signal
6=token numbering signal
21=node transmit receive unit shell
22=wire transmission output interface
23=transmission over radio 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 interrogation signal generative circuit group.Circuit theory is referring to accompanying drawing 11.
29=node interrogation 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 DDThe input of pin power connection, RX OUTPin is as the output and the acknowledge 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 interrogation signal as the input of node interrogation signal with train of signal line output treatment circuit [29].The schematic circuit diagram of transceiver module are referring to accompanying drawing 6.
31=acknowledge signal forwarding module.Adopt programmable single chip computer chip 89C51.Finish the access of token acknowledge 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 transmission over radio 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 exchange 38, this exchange can adopt common exchange 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 exchange 38 of transmission route, 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 read out instrument, 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 exchange 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 telltale, keyboard interface processing element and mouse interface processing element 49, a central process unit (CPU) 50 is used for system management and operation 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, hard disk parts (HD) 52 that are used for the long-term storage data with mainboard 41 bonded assemblys are preserved all image data and through the result data of special software processed, 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
Mobile and the state exchange of system signal is described as follows:
The state exchange of the acknowledge signal that system produces in interrogation signal that the node transmit receive 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 transmit receive 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 transmit receive 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 interrogation signal and form a high level pulse ripple effectively the time, this pulse wave will act on the input end of trigger circuit and make trigger circuit send an energizing signal.So far, the system interrogation signal condition change-over period finishes.
● token acknowledge signal: produce by token device,, receive by the node transmit receive unit through the antenna emission.The system interrogation signal similar that state conversion process and node transmit receive unit produce, just direction is opposite.Be briefly described as follows:
● determine the encoded radio of this token by the mode 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 transmit receive unit receives token radiofrequency signal described above (token acknowledge signal) through its antenna, is baseband signal through node signal transceiver module demodulation process;
● baseband signal is transmitted parts through node and is transmitted to network.So far, token acknowledge signal state exchange end cycle.
● the signal that the node transmit receive 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 transmit receive unit synthesize the forwarding data with the token acknowledge 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;
● the utility model main frame is obtained signal from the exchange receiving port, or puts into internal memory or deposit hard disk in and use for special software.
For further specifying the utility model, as follows especially exemplified by example.But content of the present utility model 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 interrogation 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 encode 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 binary pair R DInput causes trigging pulse of binary pair mouth Q output, this pulse will trigger the coding of setting the sign indicating number encode 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 " receiving condition ".Finish reception, conversion and the comparison process of node interrogation signal thus;
Under the trigging pulse effect, represent the code signal of this token numbering in the setting code generation circuit of forming by 8 8421 coders, 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 dynamicizer of cascade is connected respectively, and every group coding signal will be input to the pin D of a cooresponding CT744LS199 dynamicizer 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 handing finishes, and-the gate circuit G of string manipulation circuit 1To export a negative going pulse and trigger the work of next CT744LS199 dynamicizer, finish until all data transfer.When the work of afterbody CT744LS199 dynamicizer finishes its gate circuit G 1With the RX/TX pin of negative going 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 switch circuit.
Node transmit receive unit 2 adopts the LXM3162 integrated chip of National company in the present embodiment, and these node transmit receive unit 2 frequency of operations are 2.4GHz; The signal forwarding module adopts the 89C51 micro controller system.Basic circuit structure is referring to accompanying drawing 13.The circuit working principle is:
Under device internal clock pulsating effect, one group system identification code signal produces in the setting code generation circuit of being made up of 4 8421 coders, 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 dynamicizer of cascade is connected respectively, and every group coding signal will be input to the pin D of a cooresponding CT744LS199 dynamicizer 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 handing finishes, and-the gate circuit G of string manipulation circuit 1To export a negative going pulse and trigger the work of next CT744LS199 dynamicizer, finish until the data transfer of two groups of representative system identification codes.When second stage CT744LS199 dynamicizer work finishes, its gate circuit G 1With the RX/TX pin of negative going pulse of output, with marking signal as ' send and finish ' to signal switching circuit.
From node transmit receive unit LMX3612 chip DATA INThe data of pin serial input are through the signal modulation process of node transmit receive unit, from TX OUTPin output is launched to antenna through switch circuit.
Token acknowledge 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 combine with the token numbering data that receive, from RX OUTPin outputs to output interface.Data will be transferred to network through output interface.
System coding System Design example.
The native system coding scheme comprises: systematic identification code, token numbering, nodes encoding and host computer system coding.As an embodiment of the present utility model, the coding scheme of native system 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 interrogation signal that each node transmit receive unit produced is ' 6789 ', this identification code will be by the signal transmitting and receiving module modulation treatment of node transmit receive 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 transmit receive unit receives this coding, synthetic this node monitoring data: a string node coding+this token number information ' 103398765432 ', each monitoring station or toll 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 (7)

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 self-propelled vehicle, device by antenna (10) and connected reception interrogation signal (5) and transmit coded signals (6) constitutes, node transmit receive 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 interrogation signal (5), the device of received encoded signal (6) is transported to code 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 having in the housing of token device (1) power circuit (11) and with built-in omnidirectional antenna (10) bonded assembly transceiver mode switch switching circuit (18), 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 mouth (TX of power amplifier and transceiver module (13) OUT) connect the mouth (RX of signal transmitting and receiving module (13) OUT) successively by signal comparator circuit (14), trigger circuit (15), code 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 register group of treatment circuit (54) by sealing in and going out shifting processing circuit (54), comparator circuit (55) and systematic identification code OUTEnd, the mouth of register group (1D) step-by-step meet the corresponding input end mouth (P of the digital comparator of corresponding tandem type of comparator circuit (55) 0, P 1, P 2, P 3) pin, the input end (Q of comparator 0, Q 1, Q 2, Q 3) the pin output of each coder of connection circuit (56) respectively, the coder input connects button group and trigging pulse is set, cross-linked two joint denial gates of the mouth contact Power Generation Road (15) of comparator or the input end R of two NAND gate DThe output of gate circuit connects the input end of the coder of code signal generation circuit (16), the output of coder 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 2Mouth connect and to send and to go here and there the complement mark signal.
4, system according to claim 1, it is characterized in that node transmit receive unit (2) have power circuit (27) and with antenna (25) bonded assembly transceiver mode switch switching circuit (31), 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 acknowledge 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 interrogation 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 (32) 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 interrogation signal generative circuit (28) has the 8421BCD coder of some parallel connections, its input termination is provided with button group and trigging 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 1), SH, the CD pin meets gate circuit (G 2), G 2End input negative going pulse actuation signal, G 1And G 2Mouth output and a string marking signal S that converts, CT74LS199 chip output serial data is to the DATAIN end of transceiver module (30).
7, system according to claim 1, it is characterized in that 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 process unit (50) and memory device (51) are arranged on the mainboard (41), (52), network interface card (47), video card (48), 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).
CN 200420032805 2004-02-12 2004-02-12 Token type vehicle speed monitoring and testing system Expired - Fee Related CN2693552Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 200420032805 CN2693552Y (en) 2004-02-12 2004-02-12 Token type vehicle speed monitoring and testing system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 200420032805 CN2693552Y (en) 2004-02-12 2004-02-12 Token type vehicle speed monitoring and testing system

Publications (1)

Publication Number Publication Date
CN2693552Y true CN2693552Y (en) 2005-04-20

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN 200420032805 Expired - Fee Related CN2693552Y (en) 2004-02-12 2004-02-12 Token type vehicle speed monitoring and testing system

Country Status (1)

Country Link
CN (1) CN2693552Y (en)

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