CN102097010B - Vehicle-mounted traffic signal prompt system for receiving information from road-junction signal lamp - Google Patents

Vehicle-mounted traffic signal prompt system for receiving information from road-junction signal lamp Download PDF

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Publication number
CN102097010B
CN102097010B CN201010588353XA CN201010588353A CN102097010B CN 102097010 B CN102097010 B CN 102097010B CN 201010588353X A CN201010588353X A CN 201010588353XA CN 201010588353 A CN201010588353 A CN 201010588353A CN 102097010 B CN102097010 B CN 102097010B
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branch road
road
vehicle
craspedodrome
lamp
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CN102097010A (en
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高峰
徐国艳
崔莹
宋平
姚圣卓
赵斌
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Beihang University
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Beihang University
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Abstract

The invention discloses a vehicle-mounted traffic signal prompt system for receiving information from a road-junction signal lamp, which comprises a signal acquisition and emission device (2) and a vehicle-mounted receiving and prompting device (3). The signal acquisition and emission device (2) is arranged in a road traffic signal controller (1) at a road junction and used for completing the acquisition, processing and transmission of road-junction traffic information; and the vehicle-mounted receiving and prompting device (3) is arranged near a vehicle instrument panel and used for completing receiving of wireless data and prompting of road-junction traffic information. In the invention, a lamp indication control signal output by the road traffic signal controller is used for guiding a vehicle to correctly judge the lamp indication state in a front road junction so as to provide a reference for a driver to judge driving actions in advance under the condition that a barrier exists in front of the driver, thus, the occurrences of traffic accidents are avoided and the life and the safety of the driver are guaranteed.

Description

A kind of vehicle mounted traffic signal prompt system that is used for reception channel message signal lamp information
Technical field
The present invention relates to a kind of vehicle-mounted device that traffic grade crossing signal lamp is detected; More particularly say; Be a kind ofly to realize that the lamp to road traffic signal controller shows the collection of control signal, send to the vehicle mounted traffic signal prompt system that car-mounted terminal receives and points out with the form of wireless data.
Background technology
There are the green three kinds of signal lamps of reddish yellow, digital countdown pilot lamp and analog countdown pilot lamp in the traffic road junction, and this lamp shows that language controlled by road traffic signal controller.
The green three kinds of signal lamps of reddish yellow are produced the TTL logic level of 5V by the main control unit control bus data collecting card of road traffic signal controller; Through the break-make of relay on the height control solid-state relay output board of this logic level, control the light on and off of reddish yellow green signal light thus.
Digital countdown pilot lamp and analog countdown pilot lamp are through RS485 communication interface transmission of control signals, and the transmission side communication formula is the asynchronous serial input.
Summary of the invention
The objective of the invention is to propose a kind of vehicle mounted traffic signal prompt system that is used for reception channel message signal lamp information; This system shows control signal through the lamp of gathering road traffic signal controller; And be the data message that includes all light signal states of road junction with this conversion of signals, through near the car-mounted terminal the current road junction of sending to of wireless transceiver broadcast type; Car-mounted terminal adopts a kind of vehicle positioning technology based on electronic compass; Comparison through the current absolute geographic direction of vehicle and each absolute geographic direction in branch road; Identify track, vehicle place; And the data message that on this basis car-mounted terminal is received extracts, and with this information real-time near the LCDs that is installed on the instrument panel, refresh demonstration so that exist in driver the place ahead under the situation of shelter the driver is judged that in advance driver behavior provides foundation; The generation that avoids traffic accident, guarantee driver's life security.
A kind of vehicle mounted traffic signal prompt system that is used for reception channel message signal lamp information of the present invention, said vehicle mounted traffic signal prompt system includes signals collecting emitter (2) and vehicle-mounted reception suggestion device (3); Road traffic signal controller (1) output lamp shows control signal S 1
Described signals collecting emitter (2) is installed in the road traffic signal controller (1) at road junction, is used to accomplish collection, processing and the transmission of road junction transport information;
Described vehicle-mounted reception suggestion device (3) is installed near the Vehicular instrument panel, is used to accomplish the reception of wireless data and the prompting of road junction transport information.
Signals collecting emitter (2) is made up of MCU microprocessor (22), signal acquisition module (21), wireless data sending module (23) and direction demarcating module (24);
Signal acquisition module (21) is used to gather road traffic signal controller (1) output lamp and shows control signal S 1After carrying out the high-low level conversion, output lights state information D 1Give MCU microprocessor (22);
The earth magnetic field intensity at traffic road junction, direction demarcating module (24) applying electronic compass collection place, and use this earth magnetic field intensity and calculate road junction-geographic direction D 3=EH, and WH, NH, SH}, EH represent the east orientation direction, and WH representes the west to direction, and NH representes the north orientation direction, and SH representes the south orientation direction, then with road junction-geographic direction D 3=EH, WH, NH, SH} are transferred to MCU microprocessor (22);
The lights state information D of MCU microprocessor (22) to receiving 1With branch road D 3=EH, and WH, NH, the priority that SH} took place with the time is carried out information integrated, obtains the branch road lamp and shows packet WD Out, then this branch road lamp is shown packet WD OutTransmission wireless data sending module (23);
Wireless data sending module (23) shows packet WD with wireless mode to the branch road lamp OutCarrying out broadcast type sends.
Vehicle-mounted reception suggestion device (3) is made up of MCU microprocessor (33), wireless data receiver module (31), electronic compass (32), LCD LCDs (34) and voice module (35);
Wireless data receiver module (31) is used to receive the branch road lamp that signals collecting emitter (2) sends and shows packet WD Out, and be transferred to MCU microprocessor (33);
Electronic compass (32) is used to measure the earth magnetic field intensity Car (CM on the current direction of vehicle x, CM y) and be transferred to MCU microprocessor (33); Car (CM x, CM y) in CM xThe earth magnetic field intensity of expression electronic compass output on the x axle, CM yThe earth magnetic field intensity of expression electronic compass output on the y axle;
MCU microprocessor (33) first aspect adopts angle angle (angle) parses policy to earth magnetic field intensity Car (CM x, CM y) calculate, obtain vehicle-positive northern angle β CarSecond aspect adopts Heading (direction) parses policy to vehicle-positive northern angle β CarCalculate, obtain the current absolute geographic direction FX of vehicle CarThe third aspect is with FX CarShow packet WD with the branch road lamp OutCarry out difference relatively, obtain current vehicle track of living in, extract traffic information data bag WD on this basis OutMiddle corresponding lights state and countdown state, control LCD LCDs (34) and voice module (35) show and point out;
Figure BDA0000038127180000031
Figure BDA0000038127180000032
The advantage of vehicle mounted traffic signal prompt of the present invention system is:
1. the transmitting terminal module is installed on the road traffic signal controller of each traffic road junction setting; And the receiving end module is installed in the vehicle; Utilize the lamp of road traffic signal controller output to show that control signal comes guided vehicle to judge that correctly the lamp at road junction, the place ahead shows state; So that exist in driver the place ahead under the situation of shelter the driver is judged that in advance driver behavior provides foundation, the generation that avoids traffic accident ensures driver's life security.
2. in the transmitting terminal module with road junction-geographic direction D 3={ EH, WH, NH, SH} be as the foundation of judging branch road, vehicle place, and extract the corresponding traffic lights information in branch road, vehicle place with it.
3. the modulating signal that receives of transmitting terminal module and the road traffic signal controller command signal of exporting to lamp is synchronous, and the transmitting terminal module converts command signal to the branch road lamp and shows packet WD OutBe handed down to the receiving end module that is installed in the vehicle, guaranteed that many cars receive identical branch road lamp simultaneously and show packet WD Out
4. receiving end module application electronic compass is measured the earth magnetic field intensity Car (CM on the current direction of vehicle x, CM y), and adopt angle angle (angle) parses policy to earth magnetic field intensity Car (CM x, CM y) calculate, obtain vehicle-positive northern angle β CarAdopt Heading (direction) parses policy to vehicle-positive northern angle β then CarCalculate, obtain the current absolute geographic direction FX of vehicle CarAt last with FX CarShow packet WD with the branch road lamp OutCarry out difference relatively, obtain current vehicle track of living in, extract traffic information data bag WD on this basis OutMiddle corresponding lights state and countdown state, thus control LCD LCDs and voice module show and point out.
5. vehicle mounted traffic signal prompt of the present invention system is installed can provide the transport information in the place ahead for the driver, is the effect that convenient trip, safe driving have protection.
Description of drawings
Fig. 1 is the composition frame chart that the present invention is used for the vehicle mounted traffic signal prompt system of reception channel message signal lamp information.
Fig. 2 is the structured flowchart of signals collecting emitter.
Fig. 3 is the structured flowchart of vehicle-mounted reception suggestion device.
Fig. 4 is the structured flowchart of signal acquisition module.
Fig. 5 A is the circuit theory diagrams of signals collecting emitter MCU.
Fig. 5 B is the circuit theory diagrams of signals collecting emitter wireless data sending module.
Fig. 6 is the circuit theory diagrams of signals collecting emitter signal acquisition module.
Fig. 7 is the user interface of vehicle-mounted reception suggestion device.
Among the figure: 1. road traffic signal controller 2. signals collecting emitters
21. signal acquisition module 211.I/O interface 212. photoelectrical couplers
213.I/O extended chip 214.RS-485 interface 215.RS-485 chip
23. 22.MCU wireless data sending modules 24. direction demarcating modules
31. wireless data receiver module 32. electronic compass 33.MCU
34.LCD LCDs 35. voice modules
Embodiment
To combine accompanying drawing and embodiment that the present invention is done further detailed description below.
Road traffic signal controller 1 is installed in each traffic road junction, and what be provided with for the traffic road junction is red yellowish green trichromatism lamp when pointing to, and the lamp of road traffic signal controller 1 output shows that control signal is designated as S 1If with digital countdown pilot lamp stop, when walking to indicate, the countdown control signal of road traffic signal controller 1 output is designated as S 2(abbreviate numeral-countdown control signal S as 2).If with analog countdown pilot lamp stop, when walking to indicate, the countdown control signal of road traffic signal controller 1 output is designated as S 3(abbreviate simulation-countdown control signal S as 3).In electronic technology field, numeral-countdown control signal S 2And simulation-countdown control signal S 3Be the signal of same type, so following content is only used countdown control signal S 2Describe.Only there is a kind of signal lamp mode at each traffic road junction, so in the present invention, just lists the processing mode of lifting a kind of signal lamp, shows control signal S with lamp 1For example describes.
Referring to shown in Figure 1, the present invention is a kind of vehicle mounted traffic signal prompt system that is used for reception channel message signal lamp information, and said vehicle mounted traffic signal prompt system includes signals collecting emitter 2 and vehicle-mounted reception suggestion device 3;
Described signals collecting emitter 2 is installed in the road traffic signal controller 1 at road junction, is used to accomplish collection, processing and the transmission of road junction transport information;
Described vehicle-mounted reception suggestion device 3 is installed near the Vehicular instrument panel, is used to accomplish the reception of wireless data and the prompting of road junction transport information.
In the present invention, referring to shown in Figure 2, signals collecting emitter 2 is made up of MCU microprocessor 22, signal acquisition module 21, wireless data sending module 23 and direction demarcating module 24;
At the road junction that the reddish yellow green light shows, the signal acquisition module 21 in the signals collecting emitter 2 is used to gather road traffic signal controller 1 output traffic lights control signal S 1After (being parallel signal) carried out the high-low level conversion, output lights state information D 1(being serial signal) given MCU microprocessor 22;
At the road junction of digital countdown pilot lamp and analog countdown pilot lamp, the signal acquisition module 21 in the signals collecting emitter 2 is used to gather the countdown control signal S of road traffic signal controller 1 output 2After (being serial signal) carried out the high-low level conversion, output countdown status information D 2(being serial signal) exported to MCU microprocessor 22;
The earth magnetic field intensity at traffic road junction, direction demarcating module 24 applying electronic compass collections in the signals collecting emitter 2 place, and use this earth magnetic field intensity and calculate the absolute geographic direction branch road D that this traffic road junction has 3=EH, and WH, NH, SH} (abbreviates road junction-geographic direction D as 3=EH, and WH, NH, SH}), EH representes the east orientation direction, and WH representes the west to direction, and NH representes the north orientation direction, and SH representes the south orientation direction, then with road junction-geographic direction D 3={ NH, SH} are transferred to MCU microprocessor 22 for EH, WH;
In the present invention, the MS2100 model that electronic compass selects for use PNI company to produce, MS2100 is small-sized twin shaft electronic compass integrated chip; Volume little (7 * 7 * 1.4mm), low-power consumption, WV is 3V; Working current is less than 1mA; Precision is 2 °, and anti-Hard Magnetic and soft magnetism interference performance are strong, and it is minimum influenced by humiture.Chip has the SPI interface, can easily communicate with various high low speed single-chip microcomputers.
The lights state information D that 22 pairs of MCU microprocessors in the signals collecting emitter 2 receive 1With branch road D 3=EH, and WH, NH, the priority that SH} took place with the time is carried out information integrated, obtains the branch road lamp and shows packet WD Out, then this branch road lamp is shown packet WD OutTransmission wireless data sending module 23;
In the present invention, the branch road lamp shows packet WD OutIn include 32 bytes, the physical significance of these 32 bytes is:
BYTE1 road junction ID
BYTE2 road junction type and branch road quantity
BYTE3 branch road 1 track quantity, absolute geographic direction
BYTE4 branch road 2 track quantity, absolute geographic direction
BYTE5 branch road 3 track quantity, absolute geographic direction
BYTE6 branch road 4 track quantity, absolute geographic direction
BYTE7 branch road 5 track quantity, absolute geographic direction
1 left-hand rotation of BYTE8 branch road, craspedodrome, right-hand rotation lights state information
2 left-hand rotations of BYTE9 branch road, craspedodrome, right-hand rotation lights state information
3 left-hand rotations of BYTE10 branch road, craspedodrome, right-hand rotation lights state information
4 left-hand rotations of BYTE11 branch road, craspedodrome, right-hand rotation lights state information
5 left-hand rotations of BYTE12 branch road, craspedodrome, right-hand rotation lights state information
BYTE13 branch road 1 left-hand rotation countdown kilobit, hundred
Ten of BYTE14 branch road 1 left-hand rotation countdowns, individual position
BYTE15 branch road 1 craspedodrome countdown kilobit, hundred
Ten of BYTE16 branch road 1 craspedodrome countdowns, individual position
BYTE17 branch road 2 left-hand rotation countdown kilobits, hundred
Ten of BYTE18 branch road 2 left-hand rotation countdowns, individual position
BYTE19 branch road 2 craspedodrome countdown kilobits, hundred
Ten of BYTE20 branch road 2 craspedodrome countdowns, individual position
BYTE21 branch road 3 left-hand rotation countdown kilobits, hundred
Ten of BYTE22 branch road 3 left-hand rotation countdowns, individual position
BYTE23 branch road 3 craspedodrome countdown kilobits, hundred
Ten of BYTE24 branch road 3 craspedodrome countdowns, individual position
BYTE25 branch road 4 left-hand rotation countdown kilobits, hundred
Ten of BYTE26 branch road 4 left-hand rotation countdowns, individual position
BYTE27 branch road 4 craspedodrome countdown kilobits, hundred
Ten of BYTE28 branch road 4 craspedodrome countdowns, individual position
BYTE29 branch road 5 left-hand rotation countdown kilobits, hundred
Ten of BYTE30 branch road 5 left-hand rotation countdowns, individual position
BYTE31 branch road 5 craspedodrome countdown kilobits, hundred
Ten of BYTE32 branch road 5 craspedodrome countdowns, individual position
The countdown status information D that 22 pairs of MCU microprocessors in the signals collecting emitter 2 receive 2With branch road D 3=EH, and WH, NH, the priority that SH} took place with the time is carried out information integrated, obtains the branch road lamp and shows packet WD Out, then this branch road lamp is shown packet WD OutTransmission wireless data sending module 23;
Wireless data sending module 23 in the signals collecting emitter 2 shows packet WD with wireless mode to the branch road lamp OutCarrying out broadcast type sends.Branch road lamp for 23 broadcasting of wireless data sending module shows packet WD OutCan be received by vehicle-mounted reception suggestion device 3, thereby the traffic at road junction, the place ahead is provided for vehicle that vehicle-mounted reception suggestion device 3 is installed and the driver who drives this vehicle.
In the present invention, referring to shown in Figure 3, signal acquisition module 21 is made up of I/O interface 211, photoelectrical coupler 212, I/O extended chip 213, RS485 interface 214 and RS485 chip 215;
I/O interface 211 in the signal acquisition module 21 is used for and road traffic signal controller 1 output traffic lights control signal S 1Chip connect, realize traffic lights control signal S 1Export to photoelectrical coupler 212;
212 pairs of traffic lights control signals of photoelectrical coupler S in the signal acquisition module 21 1Carry out the photoelectricity isolation processing, obtain isolating back light control signal S 212Export to I/O extended chip 213; In the present invention, to traffic lights control signal S 1Carrying out isolation processing is for fear of the isolation back light control signal S that issues 212Influence to original system (road traffic signal controller 1) operate as normal.
213 pairs of isolation back lights of I/O extended chip control signal S in the signal acquisition module 21 212Response for changing and collection, thereby obtain the lights state information D 1, then with the lights state information D 1Be transferred to MCU microprocessor 22;
RS485 interface 214 in the signal acquisition module 21 is used for numeral-countdown control signal S with RS485 chip 215 2And simulation-countdown control signal S 3Be transmitted to MCU microprocessor 22.Because numeral-countdown control signal S 2And simulation-countdown control signal S 3Be serial signal, only can accomplish down photos and sending messages (countdown status information D through transmission 2).RS485 chip 215 has the function that photoelectricity is isolated.
In the present invention, referring to shown in Figure 4, vehicle-mounted reception suggestion device 3 is made up of MCU microprocessor 33, wireless data receiver module 31, electronic compass 32, LCD LCDs 34 and voice module 35;
Wireless data receiver module 31 in the vehicle-mounted reception suggestion device 3 is used to receive the branch road lamp that signals collecting emitter 2 sends and shows packet WD Out, and be transferred to MCU microprocessor 33;
Electronic compass 32 in the vehicle-mounted reception suggestion device 3 is used to measure the earth magnetic field intensity Car (CM on the current direction of vehicle x, CM y) and be transferred to MCU microprocessor 33; Car (CM x, CM y) in CM xThe earth magnetic field intensity of expression electronic compass output on the x axle, CM yThe earth magnetic field intensity of expression electronic compass output on the y axle;
MCU microprocessor 33 first aspects in the vehicle-mounted reception suggestion device 3 adopt angle angle (angle) parses policy to earth magnetic field intensity Car (CM x, CM y) calculate, obtain the current angle β with direct north of vehicle Car(abbreviate vehicle-positive northern angle β as Car); Second aspect adopts Heading (direction) parses policy to vehicle-positive northern angle β CarCalculate, obtain the current absolute geographic direction FX of vehicle CarThe third aspect is with FX CarShow packet WD with the branch road lamp OutCarry out difference relatively, obtain current vehicle track of living in, extract traffic information data bag WD on this basis OutMiddle corresponding lights state and countdown state, control LCD LCDs 34 and voice module 35 show and point out, and be as shown in Figure 7.
In the present invention, angle angle parses policy does β Car = | ( a Tan ( CM y + 535 ) × 1.086 CM x + 127 ) × 180 ÷ 3.14 + 0.5 | .
In the present invention, the Heading parses policy does FX Car = Heading = β Car ( CM y ≤ 0 ) Heading = 360 - β Car ( CM y > 0 ) .
Embodiment 1:
The MCU microprocessor 22 of signals collecting emitter 2 is chosen the STC89C52RC chip; Photoelectrical coupler 212 is chosen the 6N139 chip; I/O extended chip 213 is chosen the CAT9555 chip, and RS485 chip 215 is chosen the MAX485 chip, and wireless data sending module 23 is chosen the PTR6000 wireless module with wireless data receiver module 31; The MCU microprocessor 33 of vehicle-mounted reception suggestion device 3 is chosen the S3C2440 chip, and electronic compass 32 is chosen the MS2100 chip.Shown in Fig. 5 A; 8 ends of the MCU microprocessor U1 of signals collecting emitter, 21 ends, 22 ends, 23 ends, 24 ends, 25 ends are connected with 8 ends, 7 ends, 6 ends, 5 ends, 4 ends, 3 ends of wireless data sending module U2 respectively; 5 ends, 7 ends, 12 ends, 13 ends connect respectively at 1 end, 4 ends, 3 ends, 2 ends of RS485 chip U3, and 10 ends, 11 ends, 6 ends connect 14 ends, 15 termination crystal oscillating circuits respectively at 22 ends, 23 ends, 1 end of I/O extended chip U5; 4 termination reset circuits; Meet decoupling capacitor C101 between 38 ends and 16 ends, 38 termination 5V power supplys, 16 end ground connection.
Shown in Fig. 5 B, the 2 termination 3.3V power supplys of wireless data sending module U2,1 end ground connection.
Referring to shown in Figure 6,5 ends of RS485 chip U3,6 ends, 7 ends connect 8 termination 5V power supplys, 5 end ground connection respectively at 1 end, 2 ends, 3 ends of RS485 interface P1.
2 ends of photoelectrical coupler U400 are connected with 3 ends of I/O interface P2; 3 ends are connected with 19 ends, 20 ends (signal ground) of I/O interface P2 through resistance R 100; 6 ends are connected with 4 ends of I/O extended chip, and 8 ends are connected with 4 ends of I/O extended chip through resistance R 200, are in series with capacitor C 00 between 5 ends and 8 ends; 8 termination 5V power supplys, 5 end ground connection.
2 ends of photoelectrical coupler U401 are connected with 4 ends of I/O interface P2; 3 ends are connected with 19 ends, 20 ends (signal ground) of I/O interface P2 through resistance R 101; 6 ends are connected with 5 ends of I/O extended chip, and 8 ends are connected with 5 ends of I/O extended chip through resistance R 200, are in series with capacitor C 01 between 5 ends and 8 ends; 8 termination 5V power supplys, 5 end ground connection.
2 ends of photoelectrical coupler U402 are connected with 5 ends of I/O interface P2; 3 ends are connected with 19 ends, 20 ends (signal ground) of I/O interface P2 through resistance R 102; 6 ends are connected with 6 ends of I/O extended chip, and 8 ends are connected with 6 ends of I/O extended chip through resistance R 200, are in series with capacitor C 02 between 5 ends and 8 ends; 8 termination 5V power supplys, 5 end ground connection.
2 ends of photoelectrical coupler U403 are connected with 6 ends of I/O interface P2; 3 ends are connected with 19 ends, 20 ends (signal ground) of I/O interface P2 through resistance R 103; 6 ends are connected with 7 ends of I/O extended chip, and 8 ends are connected with 7 ends of I/O extended chip through resistance R 200, are in series with capacitor C 03 between 5 ends and 8 ends; 8 termination 5V power supplys, 5 end ground connection.
2 ends of photoelectrical coupler U404 are connected with 7 ends of I/O interface P2; 3 ends are connected with 19 ends, 20 ends (signal ground) of I/O interface P2 through resistance R 104; 6 ends are connected with 8 ends of I/O extended chip, and 8 ends are connected with 8 ends of I/O extended chip through resistance R 200, are in series with capacitor C 04 between 5 ends and 8 ends; 8 termination 5V power supplys, 5 end ground connection.
2 ends of photoelectrical coupler U405 are connected with 8 ends of I/O interface P2; 3 ends are connected with 19 ends, 20 ends (signal ground) of I/O interface P2 through resistance R 105; 6 ends are connected with 9 ends of I/O extended chip, and 8 ends are connected with 9 ends of I/O extended chip through resistance R 200, are in series with capacitor C 05 between 5 ends and 8 ends; 8 termination 5V power supplys, 5 end ground connection.
2 ends of photoelectrical coupler U406 are connected with 9 ends of I/O interface P2; 3 ends are connected with 19 ends, 20 ends (signal ground) of I/O interface P2 through resistance R 106; 6 ends are connected with 10 ends of I/O extended chip, and 8 ends are connected with 10 ends of I/O extended chip through resistance R 200, are in series with capacitor C 06 between 5 ends and 8 ends; 8 termination 5V power supplys, 5 end ground connection.
2 ends of photoelectrical coupler U407 are connected with 10 ends of I/O interface P2; 3 ends are connected with 19 ends, 20 ends (signal ground) of I/O interface P2 through resistance R 107; 6 ends are connected with 11 ends of I/O extended chip, and 8 ends are connected with 11 ends of I/O extended chip through resistance R 200, are in series with capacitor C 07 between 5 ends and 8 ends; 8 termination 5V power supplys, 5 end ground connection.
2 ends of photoelectrical coupler U408 are connected with 11 ends of I/O interface P2; 3 ends are connected with 19 ends, 20 ends (signal ground) of I/O interface P2 through resistance R 108; 6 ends are connected with 13 ends of I/O extended chip, and 8 ends are connected with 13 ends of I/O extended chip through resistance R 200, are in series with capacitor C 08 between 5 ends and 8 ends; 8 termination 5V power supplys, 5 end ground connection.
2 ends of photoelectrical coupler U409 are connected with 12 ends of I/O interface P2; 3 ends are connected with 19 ends, 20 ends (signal ground) of I/O interface P2 through resistance R 109; 6 ends are connected with 14 ends of I/O extended chip, and 8 ends are connected with 14 ends of I/O extended chip through resistance R 200, are in series with capacitor C 09 between 5 ends and 8 ends; 8 termination 5V power supplys, 5 end ground connection.
2 ends of photoelectrical coupler U410 are connected with 13 ends of I/O interface P2; 3 ends are connected with 19 ends, 20 ends (signal ground) of I/O interface P2 through resistance R 110; 6 ends are connected with 15 ends of I/O extended chip, and 8 ends are connected with 15 ends of I/O extended chip through resistance R 200, are in series with capacitor C 10 between 5 ends and 8 ends; 8 termination 5V power supplys, 5 end ground connection.
2 ends of photoelectrical coupler U411 are connected with 14 ends of I/O interface P2; 3 ends are connected with 19 ends, 20 ends (signal ground) of I/O interface P2 through resistance R 111; 6 ends are connected with 16 ends of I/O extended chip, and 8 ends are connected with 16 ends of I/O extended chip through resistance R 200, are in series with capacitor C 11 between 5 ends and 8 ends; 8 termination 5V power supplys, 5 end ground connection.
2 ends of photoelectrical coupler U412 are connected with 15 ends of I/O interface P2; 3 ends are connected with 19 ends, 20 ends (signal ground) of I/O interface P2 through resistance R 112; 6 ends are connected with 17 ends of I/O extended chip, and 8 ends are connected with 17 ends of I/O extended chip through resistance R 200, are in series with capacitor C 12 between 5 ends and 8 ends; 8 termination 5V power supplys, 5 end ground connection.
2 ends of photoelectrical coupler U413 are connected with 16 ends of I/O interface P2; 3 ends are connected with 19 ends, 20 ends (signal ground) of I/O interface P2 through resistance R 113; 6 ends are connected with 18 ends of I/O extended chip, and 8 ends are connected with 18 ends of I/O extended chip through resistance R 200, are in series with capacitor C 13 between 5 ends and 8 ends; 8 termination 5V power supplys, 5 end ground connection.
2 ends of photoelectrical coupler U414 are connected with 17 ends of I/O interface P2; 3 ends are connected with 19 ends, 20 ends (signal ground) of I/O interface P2 through resistance R 114; 6 ends are connected with 19 ends of I/O extended chip, and 8 ends are connected with 19 ends of I/O extended chip through resistance R 200, are in series with capacitor C 14 between 5 ends and 8 ends; 8 termination 5V power supplys, 5 end ground connection.
2 ends of photoelectrical coupler U415 are connected with 18 ends of I/O interface P2; 3 ends are connected with 19 ends, 20 ends (signal ground) of I/O interface P2 through resistance R 115; 6 ends are connected with 20 ends of I/O extended chip, and 8 ends are connected with 20 ends of I/O extended chip through resistance R 200, are in series with capacitor C 15 between 5 ends and 8 ends; 8 termination 5V power supplys, 5 end ground connection.
2 ends of I/O extended chip U5,3 ends, 21 ends connect 5V power supply or ground connection respectively, 24 termination 5V power supplys, 12 end ground connection.

Claims (3)

1. vehicle mounted traffic signal prompt system that is used for reception channel message signal lamp information, road traffic signal controller (1) output lamp shows control signal S 1, it is characterized in that: said vehicle mounted traffic signal prompt system includes signals collecting emitter (2) and vehicle-mounted reception suggestion device (3);
Described signals collecting emitter (2) is installed in the road traffic signal controller (1) at road junction, is used to accomplish collection, processing and the transmission of road junction transport information;
Described vehicle-mounted reception suggestion device (3) is installed near the Vehicular instrument panel, is used to accomplish the reception of wireless data and the prompting of road junction transport information;
Said signals collecting emitter (2) is made up of MCU microprocessor (22), signal acquisition module (21), wireless data sending module (23) and direction demarcating module (24);
Signal acquisition module (21) is used to gather road traffic signal controller (1) output lamp and shows control signal S 1After carrying out the high-low level conversion, output lights state information D 1Give MCU microprocessor (22);
The earth magnetic field intensity at traffic road junction, direction demarcating module (24) applying electronic compass collection place, and use this earth magnetic field intensity and calculate road junction-geographic direction D 3=EH, and WH, NH, SH}, EH represent the east orientation direction, and WH representes the west to direction, and NH representes the north orientation direction, and SH representes the south orientation direction, then with road junction-geographic direction D 3=EH, WH, NH, SH} are transferred to MCU microprocessor (22);
The lights state information D of MCU microprocessor (22) to receiving 1With branch road D 3=EH, and WH, NH, the priority that SH} took place with the time is carried out information integrated, obtains the branch road lamp and shows packet WD Out, then this branch road lamp is shown packet WD OutTransmission wireless data sending module (23);
The branch road lamp shows packet WD OutIn include 32 bytes, the physical significance of these 32 bytes is:
BYTE1 road junction ID
BYTE2 road junction type and branch road quantity
BYTE3 branch road 1 track quantity, absolute geographic direction
BYTE4 branch road 2 track quantity, absolute geographic direction
BYTE5 branch road 3 track quantity, absolute geographic direction
BYTE6 branch road 4 track quantity, absolute geographic direction
BYTE7 branch road 5 track quantity, absolute geographic direction
1 left-hand rotation of BYTE8 branch road, craspedodrome, right-hand rotation lights state information
2 left-hand rotations of BYTE9 branch road, craspedodrome, right-hand rotation lights state information
3 left-hand rotations of BYTE10 branch road, craspedodrome, right-hand rotation lights state information
4 left-hand rotations of BYTE11 branch road, craspedodrome, right-hand rotation lights state information
5 left-hand rotations of BYTE12 branch road, craspedodrome, right-hand rotation lights state information
BYTE13 branch road 1 left-hand rotation countdown kilobit, hundred
Ten of BYTE14 branch road 1 left-hand rotation countdowns, individual position
BYTE15 branch road 1 craspedodrome countdown kilobit, hundred
Ten of BYTE16 branch road 1 craspedodrome countdowns, individual position
BYTE17 branch road 2 left-hand rotation countdown kilobits, hundred
Ten of BYTE18 branch road 2 left-hand rotation countdowns, individual position
BYTE19 branch road 2 craspedodrome countdown kilobits, hundred
Ten of BYTE20 branch road 2 craspedodrome countdowns, individual position
BYTE21 branch road 3 left-hand rotation countdown kilobits, hundred
Ten of BYTE22 branch road 3 left-hand rotation countdowns, individual position
BYTE23 branch road 3 craspedodrome countdown kilobits, hundred
Ten of BYTE24 branch road 3 craspedodrome countdowns, individual position
BYTE25 branch road 4 left-hand rotation countdown kilobits, hundred
Ten of BYTE26 branch road 4 left-hand rotation countdowns, individual position
BYTE27 branch road 4 craspedodrome countdown kilobits, hundred
Ten of BYTE28 branch road 4 craspedodrome countdowns, individual position
BYTE29 branch road 5 left-hand rotation countdown kilobits, hundred
Ten of BYTE30 branch road 5 left-hand rotation countdowns, individual position
BYTE31 branch road 5 craspedodrome countdown kilobits, hundred
Ten of BYTE32 branch road 5 craspedodrome countdowns, individual position
Wireless data sending module (23) shows packet WD with wireless mode to the branch road lamp OutCarrying out broadcast type sends;
Said vehicle-mounted reception suggestion device (3) is made up of MCU microprocessor (33), wireless data receiver module (31), electronic compass (32), LCD LCDs (34) and voice module (35);
Wireless data receiver module (31) is used to receive the branch road lamp that signals collecting emitter (2) sends and shows packet WD Out, and be transferred to MCU microprocessor (33);
Electronic compass (32) is used to measure the earth magnetic field intensity Car (CM on the current direction of vehicle x, CM y) and be transferred to MCU microprocessor (33); Car (CM x, CM y) in CM xThe earth magnetic field intensity of expression electronic compass output on the x axle, CM yThe earth magnetic field intensity of expression electronic compass output on the y axle;
MCU microprocessor (33) first aspect adopts angle angle parses policy to earth magnetic field intensity Car (CM x, CM y) calculate, obtain vehicle-positive northern angle β CarSecond aspect adopts the Heading parses policy to vehicle-positive northern angle β CarCalculate, obtain the current absolute geographic direction FX of vehicle CarThe third aspect is with FX CarShow packet WD with the branch road lamp OutCarry out difference relatively, obtain current vehicle track of living in, extract traffic information data bag WD on this basis OutMiddle corresponding lights state and countdown state, control LCD LCDs (34) and voice module (35) show and point out;
Angle angle parses policy does β Car = | ( a Tan ( CM y + 535 ) × 1.086 CM x + 127 ) × 180 ÷ 3.14 + 0.5 | ;
The Heading parses policy does FX Car = Heading = β Car ( CM y ≤ 0 ) Heading = 360 - β Car ( CM y > 0 ) .
2. the vehicle mounted traffic signal prompt system that is used for reception channel message signal lamp information according to claim 1 is characterized in that: signal acquisition module (21) is made up of I/O interface (211), photoelectrical coupler (212), I/O extended chip (213), RS485 interface (214) and RS485 chip (215).
3. the vehicle mounted traffic signal prompt system that is used for reception channel message signal lamp information according to claim 1 is characterized in that: the MS2100 model that electronic compass selects for use PNI company to produce.
CN201010588353XA 2010-12-14 2010-12-14 Vehicle-mounted traffic signal prompt system for receiving information from road-junction signal lamp Expired - Fee Related CN102097010B (en)

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