CN107804228A - A kind of rear-end warning system of hazardous materials transportation vehicle - Google Patents
A kind of rear-end warning system of hazardous materials transportation vehicle Download PDFInfo
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- CN107804228A CN107804228A CN201711204021.5A CN201711204021A CN107804228A CN 107804228 A CN107804228 A CN 107804228A CN 201711204021 A CN201711204021 A CN 201711204021A CN 107804228 A CN107804228 A CN 107804228A
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
- B60Q9/00—Arrangement or adaptation of signal devices not provided for in one of main groups B60Q1/00 - B60Q7/00, e.g. haptic signalling
- B60Q9/008—Arrangement or adaptation of signal devices not provided for in one of main groups B60Q1/00 - B60Q7/00, e.g. haptic signalling for anti-collision purposes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
- B60R16/023—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for transmission of signals between vehicle parts or subsystems
- B60R16/0231—Circuits relating to the driving or the functioning of the vehicle
- B60R16/0232—Circuits relating to the driving or the functioning of the vehicle for measuring vehicle parameters and indicating critical, abnormal or dangerous conditions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T7/00—Brake-action initiating means
- B60T7/12—Brake-action initiating means for automatic initiation; for initiation not subject to will of driver or passenger
- B60T7/22—Brake-action initiating means for automatic initiation; for initiation not subject to will of driver or passenger initiated by contact of vehicle, e.g. bumper, with an external object, e.g. another vehicle, or by means of contactless obstacle detectors mounted on the vehicle
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Automation & Control Theory (AREA)
- Human Computer Interaction (AREA)
- Transportation (AREA)
- Emergency Alarm Devices (AREA)
Abstract
The invention provides a kind of rear-end warning system of hazardous materials transportation vehicle, including ultrasonic ranging unit, Bus- Speed Monitoring unit, steering detection unit, gas pedal monitoring unit, brake pedal monitoring unit, CAN communication unit, processor unit, key-press input unit, display unit, acousto-optic warning unit, brake unit and power supply power supply unit.The present invention is based on sensor, CAN communicates and single-chip microcomputer treatment technology, realize accurate the distance between ranging and real-time display vehicle before and after vehicle, it is also provided with segmental alarm lamp, human pilot can be reminded in time, and take forced brake in vehicle risk state, substantially increase safety factor of travel, effectively reduce the incidence of traffic accident, its is simple in construction, cost is cheap, system power dissipation is low, accuracy of detection is high, respond sensitive, stability and good reliability, with good autgmentability, substantially increase safety coefficient of the hazardous materials transportation vehicle in way transport.
Description
Technical field
The present invention relates to logistics transportation security technology area, the early warning system of knocking into the back of more particularly to a kind of hazardous materials transportation vehicle
System.
Background technology
With the economic sustained and rapid development in China, road transport vehicle fleet size is on the increase, in recent years road transport vehicle
Ascendant trend is presented in accident, of common occurrence on various media especially with respect to being reported in for expressway traffic accident.Wherein great evil
Sexual behavior part is mostly that coach knocks into the back with hazardous materials transportation vehicle.Because coach speed is very fast, hazardous materials transportation car
Speed it is slower, easily cause vehicle rear-end collision accident.From the point of view of the similar accident occurred, the generation of such accident can cause car
Scrap, even car crash, cause economic loss huge, casualties is heavy, and environment is caused seriously to pollute.It is long
Way car and mass casualties and huge property loss caused by hazardous materials transportation vehicle rear-end collision, have caused the very big pass of society
Note, has influence on social stability and harmonious development.
The content of the invention
(1) technical problem solved
In order to solve the above problems, the invention provides a kind of rear-end warning system of hazardous materials transportation vehicle, realize
Accurate the distance between ranging and real-time display vehicle, are also provided with segmental alarm lamp, improve traffic safety system before and after vehicle
Number, effectively reduce the incidence of traffic accident.
(2) technical scheme
A kind of rear-end warning system of hazardous materials transportation vehicle, including ultrasonic ranging unit, Bus- Speed Monitoring unit, steering
Detection unit, gas pedal monitoring unit, brake pedal monitoring unit, CAN communication unit, processor unit, key-press input list
Member, display unit, acousto-optic warning unit, brake unit and power supply power supply unit；The ultrasonic ranging unit is installed on vehicle
On front/rear collision bumper, it is responsible for the distance between monitoring and fore-aft vehicle；The Bus- Speed Monitoring unit detects Vehicle Speed；Institute
State and turn to whether detection unit detection vehicle is in steering state；Whether the gas pedal monitoring unit detection gas pedal is loose
Open；Whether the brake pedal monitoring unit monitoring human pilot steps on brake system；The information of the sensor collection is sent into
Vehicle-mounted CAN bus, the processor unit are read by the CAN communication unit and carry out Treatment Analysis, the processor list
Member output connects the display unit, the acousto-optic warning unit and the brake unit respectively；The key-press input unit is set
Put alarm threshold value；The display unit is installed on vehicle cab, the distance between real-time display and fore-aft vehicle and vehicle row
Sail speed；The acousto-optic warning unit is installed on driver's cabin, when the processor unit judges vehicle Times in the hole
It is alert to remind human pilot；When vehicle is in highest precarious position, the brake unit automatic start, pressure brake is carried out；Institute
State power supply power supply unit and provide operating voltage to the other each units of system.
Further, the processor unit selects 16 single-chip microcomputer MC95S12DJ128.
Further, the ultrasonic ranging unit includes ultrasonic wave transmitter module and ultrasonic wave receiving module；It is described super
Acoustic emission module includes ultrasonic wave transmitting probe, oscillator, potentiometer, first resistor, the first and second electric capacity, wherein described
Ultrasonic wave transmitting probe selects CSB40T, and the oscillator selects NE555 time-base generators；The ultrasonic wave receiving module includes
Ultrasonic wave receiving transducer, ultrasonic wave detector receiver, the 3rd~the 6th electric capacity and the second~the 4th resistance, wherein the ultrasonic wave
Receiving transducer selects CSB40T, and the ultrasonic wave detector receiver selects infrared ray detection reception special chip CX20106A, institute
It is electrochemical capacitor to state the 4th~the 6th electric capacity.
Further, the Bus- Speed Monitoring unit includes vehicle speed sensor, the first and second operational amplifiers, the one or three pole
Pipe, the first diode, the 5th~the 13rd resistance and the 7th~the 9th electric capacity, wherein the vehicle speed sensor selects CSHG-06
Hall effect speed probe, first and second operational amplifier select LM258, and first diode is Schottky two
Pole pipe, the 7th and the 9th electric capacity is electrochemical capacitor.
Further, the steering detection unit selects GC03-SP3000 rotation direction sensors.
Further, the gas pedal monitoring unit and the brake pedal monitoring unit select HT-PD pressure sensings
Device.
Further, the CAN communication unit include CAN transceiver, connector, the 14th~the 18th resistance,
Tenth and the 11st electric capacity, wherein the CAN transceiver selects PCA82C250, the connector is 9 needle connectors.
Further, the acousto-optic warning unit includes tri-state buffers, buzzer, the second triode, the first~the 3rd
Light emitting diode and the 19th~the 22nd resistance, wherein the tri-state buffers select the digit buffer 74LS244 of tri-state eight,
First light emitting diode is green diode, and second light emitting diode is gold-tinted diode, the described 3rd luminous two
Pole pipe is red diodes.
Further, the key-press input unit plugs 4 × 4 keyboards from the pin of external 8, and the display unit is selected outer
Formula dot matrix LCD module JD12232A3 is put, the brake unit selects solenoid directional control valve.
Further, the power supply power supply unit includes power supply, the first and second voltage-stablizers, the second diode and the 12nd
~the ten six electric capacity, wherein the power supply is Vehicular accumulator cell, first voltage-stablizer selects LM7805, second voltage-stablizer
From LM1117, second diode is Schottky diode, and the 16th electric capacity is electrochemical capacitor.
(3) beneficial effect
The invention provides a kind of rear-end warning system of hazardous materials transportation vehicle, based on sensor, CAN communication and
Single-chip microcomputer treatment technology, accurate the distance between ranging and real-time display vehicle before and after vehicle are realized, is also provided with segmentation report
Warning lamp, human pilot can be reminded in time, and take forced brake in vehicle risk state, substantially increase safety factor of travel,
The incidence of traffic accident is effectively reduced, its is simple in construction, and cost is cheap, and system power dissipation is low, and accuracy of detection is high, response spirit
It is quick, stability and good reliability, there is good autgmentability, substantially increase safety system of the hazardous materials transportation vehicle in way transport
Number.
Brief description of the drawings
Fig. 1 is a kind of rear-end warning system structural representation of hazardous materials transportation vehicle involved in the present invention.
Fig. 2 is a kind of ultrasonic ranging unit electricity of the rear-end warning system of hazardous materials transportation vehicle involved in the present invention
Road schematic diagram.
Fig. 3 is a kind of Bus- Speed Monitoring element circuit of the rear-end warning system of hazardous materials transportation vehicle involved in the present invention
Schematic diagram.
Fig. 4 is a kind of CAN communication element circuit of the rear-end warning system of hazardous materials transportation vehicle involved in the present invention
Schematic diagram.
Fig. 5 is a kind of acousto-optic warning unit circuit of the rear-end warning system of hazardous materials transportation vehicle involved in the present invention
Schematic diagram.
Fig. 6 is a kind of power supply power supply unit circuit of the rear-end warning system of hazardous materials transportation vehicle involved in the present invention
Schematic diagram.
Embodiment
Embodiment involved in the present invention is described in further details below in conjunction with the accompanying drawings.
As shown in figure 1, a kind of rear-end warning system of hazardous materials transportation vehicle, including the inspection of ultrasonic ranging unit, speed
Survey unit, turn to detection unit, gas pedal monitoring unit, brake pedal monitoring unit, CAN communication unit, processor unit,
Key-press input unit, display unit, acousto-optic warning unit, brake unit and power supply power supply unit；Ultrasonic ranging unit is installed
In on vehicle front/rear collision bumper, it is responsible for the distance between monitoring and fore-aft vehicle；Bus- Speed Monitoring unit detects Vehicle Speed；
Turn to whether detection unit detection vehicle is in steering state；Whether gas pedal monitoring unit detection gas pedal unclamps；System
Whether dynamic pedal monitoring unit monitoring human pilot steps on brake system；It is total that the information of the sensor collection is sent into vehicle-mounted CAN
Line, processor unit are read by CAN communication unit and carry out Treatment Analysis, and connection display is single respectively for processor unit output
Member, acousto-optic warning unit and brake unit；Key-press input unit sets alarm threshold value；Display unit is installed on vehicle cab,
The distance between real-time display and fore-aft vehicle and Vehicle Speed；Acousto-optic warning unit is installed on driver's cabin, works as processor
Unit judges vehicle is in unsafe condition alarm and reminds human pilot；When vehicle is in the hole, brake unit is certainly
It is dynamic to start, carry out pressure brake；Power supply power supply unit provides operating voltage to the other each units of system.
Processor unit selects 16 single-chip microcomputer MC95S12DJ128, its built-in 128KB Flash, 8KB RAM and 2KB
EEPROM.50MHz is can reach with 5V inputs and driving force, CPU working frequencies.The digital I/O interfaces of 29 tunnel independences, 20
Road band interrupts and the digital I/O interfaces of arousal function, 10 A/D converters of 28 passages, and the input capture with 8 passages/
Output is compared, also with 8 programmable PWM passages.With 2 serial asynchronous communication interface SCI, 2 synchronous serial peripheral hardwares connect
Mouth SPI, I2C buses and CAN functional modules etc..
As shown in Fig. 2 ultrasonic ranging unit includes ultrasonic wave transmitter module and ultrasonic wave receiving module；Ultrasonic wave is launched
Module includes ultrasonic wave transmitting probe S1, oscillator U1, potentiometer Rw1, resistance R1, electric capacity C1 and C2, and wherein ultrasonic wave is launched
Probe S1 selects CSB40T, oscillator U1 to select NE555 time-base generators；Ultrasonic wave receiving module includes ultrasonic wave receiving transducer
S2, ultrasonic wave detector receiver U2, electric capacity C3~C6 and resistance R2~R4, wherein ultrasonic wave receiving transducer S2 select CSB40T,
Ultrasonic wave detector receiver U2 is electrochemical capacitor from infrared ray detection reception special chip CX20106A, electric capacity C4~C6.
40KHz ultrasonic wave is using caused by NE555 time base circuits vibration driving ultrasonic probe S1.Change potentiometer Rw1 resistance
The adjustable frequency for producing signal of value, is allowed to consistent with ultrasonic probe S1 40KHz intrinsic frequencies.The RST of NE555 timers
Pin is reset terminal, is utilized to control the transmitting of ultrasonic pulse.When RST pin are high level, NE555 has oscillating impulse defeated
Go out；For low level when, NE555 timers reset, do not export.Thus by RST pin and single-chip microcomputer MC95S12DJ128 control
Signal connect can control radiating circuit.To ensure that NE555 time base circuits have enough driving forces, using 12V power supplys
Power supply.RST pin are ultrasonic wave emissioning controling signal input, are controlled by single-chip microcomputer MC95S12DJ128 P1.0 mouths.
CX20106A is the special chip of a infrared ray detection reception, is usually used in television set infrared remote control receiver.In view of infrared
The conventional carrier frequency of remote control is that 38KHz and the ultrasonic frequency 40KHz of ranging are closer to, it is possible to does ultrasound using it
The detection of ripple receives.Ultrasonic wave receiving transducer S2 after electric capacity C3 tentatively filtering, will enter after the echo-signal received conversion
Enter CX20106A IN pin, by the preamplifier inside CX20106A, limited range enlargement, (centre frequency is bandpass filter
40KHz), wave detector and comparator, finally by internal shaping circuit, exported from OUT pin to single-chip microcomputer MC95S12DJ128
External interrupt P3.2 mouths.When CX20106A receives 40KHz signal, the output of OUT pin switchs to low level by high level,
When single-chip microcomputer MC95S12DJ128 external interrupt P3.2 mouths detect the trailing edge or low level of input signal, in producing immediately
It is disconnected, while stop Timer/Counter, so as to obtain the echo time t of ultrasonic wave.Single-chip microcomputer MC95S12DJ128 is public according to calculating
Formula d=vt/2, v are sound wave spread speed in atmosphere, so that it may calculate supersonic generator and the distance d of launching objects.
Vehicle speed can be measured by vehicle speed sensor, and wheel, which often rotates one week, can then export a number of pulse,
These pulses of accurate judgement are crucial.As shown in figure 3, Bus- Speed Monitoring unit include vehicle speed sensor, operational amplifier U3 and U4,
Triode Q1, diode D1, resistance R5~R13 and electric capacity C7~C9, wherein vehicle speed sensor are turned from CSHG-06 Hall effect
Fast sensor, it is Schottky diode that operational amplifier U3 and U4, which select LM258, diode D1, and electric capacity C7 and C9 are electrolysis electricity
Hold.The key property of CSHG-06 Hall effect speed probes is fixed precession length；Measure low frequency signal；Temperature range
It is wide；Integrated short circuit and Antimagnetic protection；8~36V of operating voltage；Fixed precession length 0.5mm；Operating temperature -40~+120 DEG C.
There is high sensitivity, precision height, small volume, strong antijamming capability.Removed first by the RC filtering of circuit front-end high
Frequency disturbs, and by follower U3, then by comparator U4 circuit outputs, controls the triode Q1 of rear end break-make, produces stable
Pulse signal, be sent into single-chip microcomputer MC95S12DJ128 and carry out Treatment Analysis.
For vehicle when turning, ultrasonic probe can be the roadblock of road both sides or spacer as target, so as to make danger
Danger judges, triggers alarm.In order to suppress such case, turn to detection unit and select GC03-SP3000 rotation direction sensors.The sensing
Device key property is：Long lifespan；87 ° of mechanical angle, 45 ° of electric angle.
Gas pedal monitoring unit is used to detect when alarm occurs, and whether human pilot has unclamped throttle, is judged with this
Whether alarm is suppressed.Brake pedal monitoring unit is used to detect when alarm occurs, and whether human pilot has stepped on brake
Car system, judge whether to suppress alarm with this.The pressure change in gas pedal and brake pedal need to be only monitored respectively
, it is used uniformly HT-PD pressure sensors and the pressure in gas pedal and brake pedal is detected.The master of the sensor
Wanting characteristic is：It is compact-sized, in light weight；High impact-resistant and vibration ability；High IP protective capacities；Reliability and stability are high.
The data message of system sensor collection is sent into vehicle-mounted CAN bus and read for single-chip microcomputer MC95S12DJ128.CAN
(controller LAN) is that, by then passing through differential mode transmission, it has structure in the world with one of widest bus
Simply, transmission range is farther out, speed is very fast, nodes are free, the characteristic such as safe and reliable, it is enjoyed pass in vehicle electric field
Note.CAN exchanges information between being designed in ECU (vehicle electronic control unit), so as to constitute automobile electron.
CAN technical specifications include the frame for mainly having 4 types during 2.0A and 2.0B, wherein CAN message transmissions：It is data frame, long-range
Frame, error frame and overload frame.In view of the CAN normal data frame format used in the system, so design uses
CAN2.0B, data frame use normal data frame.
CAN communication unit is designed based on MC95S12DJ128, is mainly used in completing the communication with CAN, is read
Required data, realize the noiseless communication between each system of automobile.As shown in figure 4, CAN communication unit is received and dispatched including CAN
Device U5, connector J1, resistance R14~R18, electric capacity C10 and C11, wherein CAN transceiver U5 select PCA82C250, connection
Device J1 is 9 needle connectors.CAN transceiver PCA82C250 is the driver interface between CAN controller and CAN, can
To provide the differential transmitting capacity to CAN and the differential receiving ability to CAN controller, most high speed up to 1Mbps, with
ISO11898 standards are compatible.Its slop control function strengthens Electro Magnetic Compatibility, and ready mode can reduce the work(of CAN network
Consume, in ready mode, CAN network, which once detects, has message to be activated immediately in bus.Meanwhile it can provide stronger resist
Interference performance, and have the advantages that Thermal protection, short-circuit protection, support up to 110 communication nodes.Connected in communication node end
1 120 Ω terminal coupling resistance R17, improve the anti-interference of data communication.CAN transceiver PCA82C250 pin
CANH connects the high low bit of CAN with CANL by 9 needle connector J1.
Single-chip microcomputer MC95S12DJ128 will be calculated with fore-aft vehicle distance and Current vehicle travel speed with presetting
Alarm threshold value when being compared analysis and judging that vehicle is in the hole, sent by acousto-optic warning unit to human pilot
Alarm.As shown in figure 5, acousto-optic warning unit includes tri-state buffers U7, buzzer B1, triode Q2, LED 1
~LED3 and resistance R19~R22, wherein tri-state buffers U7 select the digit buffer 74LS244 of tri-state eight, LED 1
For green diode, LED 2 is gold-tinted diode, and LED 3 is red diodes.The system is to danger
Dangerous state carries out three-level alarm：When in low precarious position, only green diode LED1 is lit, and reminds human pilot note
Meaning；When harmful grade increases, gold-tinted diode (LED) 2 is lit, while with the buzzer releived, reminds human pilot
Take measures；When reaching highest harmful grade, red diodes LED3 is lit, while buzzer is switched to hurriedly by releiving,
Human pilot is reminded to lose no time to brake.Single-chip microcomputer MC95S12DJ128 P2.20 mouths driving green diode LED1 has been respectively adopted,
P2.21 mouths driving gold-tinted diode (LED) 2, P2.22 mouths driving red diodes LED3, P2.23 mouth driving buzzer B1.
Key-press input unit plugs 4 × 4 keyboards from the pin of external 8, and the alarm of distance and speed can be set by button
Threshold value.Display unit selects external dot matrix LCD module JD12232A3, pair with the distance between fore-aft vehicle and
Current vehicle travel speed carries out real-time display.
When the alarm of highest harmful grade occurs, for some reason, human pilot could not may brake in time, therefore need
Want system force start brake system.When alarm occurs, using the pressure sensor on brake pedal, it is known that driver
Whether member is braked, if human pilot does not brake in time, pwm pulse signal is exported by single-chip microcomputer MC95S12DJ128
Driving and braking units.Brake unit selects solenoid directional control valve, and single-chip microcomputer MC95S12DJ128 controls the movement of solenoid directional control valve, changed
Become oil pressure so as to force start brake system.
System is powered using 12V Vehicular accumulator cells.The operating voltage of single-chip microcomputer MC95S12DJ128 kernels is 3.3V,
And peripheral circuit operating voltage is 5V；The operating voltage of ultrasonic ranging unit and remote-control anti-theft unit is 12V, it is therefore desirable to will
12V voltage conversions are 5V and 3.3V.As shown in fig. 6, power supply power supply unit includes power supply, voltage-stablizer 8 and 9, diode D2 and electricity
Hold C12~C16, wherein power supply is Vehicular accumulator cell, and voltage-stablizer U8 selects LM7805, voltage-stablizer U9 to select LM1117, diode
D2 is Schottky diode, and electric capacity C16 is electrochemical capacitor.12V Vehicular accumulator cells pass through the fixed integrated voltage-stabilized chip in three ends
LM7805 is converted to 5V, then can align voltage-stablizer integrated circuit LM1117 by three ends and be converted to 3.3V.
The invention provides a kind of rear-end warning system of hazardous materials transportation vehicle, based on sensor, CAN communication and
Single-chip microcomputer treatment technology, accurate the distance between ranging and real-time display vehicle before and after vehicle are realized, is also provided with segmentation report
Warning lamp, human pilot can be reminded in time, and take forced brake in vehicle risk state, substantially increase safety factor of travel,
The incidence of traffic accident is effectively reduced, its is simple in construction, and cost is cheap, and system power dissipation is low, and accuracy of detection is high, response spirit
It is quick, stability and good reliability, there is good autgmentability, substantially increase safety system of the hazardous materials transportation vehicle in way transport
Number.
The above-described embodiments are merely illustrative of preferred embodiments of the present invention, not to the structure of the present invention
Think and scope is defined.On the premise of design concept of the present invention is not departed from, technology of the ordinary people in the field to the present invention
The all variations and modifications that scheme is made, all should drop into protection scope of the present invention, the claimed technology contents of the present invention,
All record in detail in the claims.
Claims (10)
- A kind of 1. rear-end warning system of hazardous materials transportation vehicle, it is characterised in that：Including ultrasonic ranging unit, Bus- Speed Monitoring Unit, turn to detection unit, gas pedal monitoring unit, brake pedal monitoring unit, CAN communication unit, processor unit, press Key input unit, display unit, acousto-optic warning unit, brake unit and power supply power supply unit；The ultrasonic ranging unit peace Loaded on vehicle front/rear collision bumper, it is responsible for the distance between monitoring and fore-aft vehicle；The Bus- Speed Monitoring unit detects vehicle row Sail speed；Whether the steering detection unit detection vehicle is in steering state；The gas pedal monitoring unit detects throttle Whether pedal unclamps；Whether the brake pedal monitoring unit monitoring human pilot steps on brake system；The sensor gathers Information be sent into vehicle-mounted CAN bus, the processor unit read by the CAN communication unit and carries out Treatment Analysis, institute State processor unit output and connect the display unit, the acousto-optic warning unit and the brake unit respectively；The button Input block sets alarm threshold value；The display unit is installed on vehicle cab, between real-time display and fore-aft vehicle away from From and Vehicle Speed；The acousto-optic warning unit is installed on driver's cabin, when the processor unit judges that vehicle is in danger Dangerous state alarm reminds human pilot；When vehicle is in highest precarious position, the brake unit automatic start, carry out strong System brake；The power supply power supply unit provides operating voltage to the other each units of system.
- A kind of 2. rear-end warning system of hazardous materials transportation vehicle according to claim 1, it is characterised in that：The processing Device unit selects 16 single-chip microcomputer MC95S12DJ128.
- A kind of 3. rear-end warning system of hazardous materials transportation vehicle according to claim 1, it is characterised in that：The ultrasound Ripple range cells include ultrasonic wave transmitter module and ultrasonic wave receiving module；The ultrasonic wave transmitter module is launched including ultrasonic wave Probe, oscillator, potentiometer, first resistor, the first and second electric capacity, wherein the ultrasonic wave transmitting probe selects CSB40T, The oscillator selects NE555 time-base generators；The ultrasonic wave receiving module includes ultrasonic wave receiving transducer, ultrasonic wave detection Receiver, the 3rd~the 6th electric capacity and the second~the 4th resistance, wherein the ultrasonic wave receiving transducer selects CSB40T, it is described super Sound wave detector receiver selects infrared ray detection reception special chip CX20106A, and the 4th~the 6th electric capacity is electrolysis electricity Hold.
- A kind of 4. rear-end warning system of hazardous materials transportation vehicle according to claim 1, it is characterised in that：The speed Detection unit includes vehicle speed sensor, the first and second operational amplifiers, the first triode, the first diode, the 5th~the tenth Three resistance and the 7th~the 9th electric capacity, wherein the vehicle speed sensor selects CSHG-06 Hall effect speed probes, described One and second operational amplifier select LM258, first diode is Schottky diode, and the 7th and the 9th electric capacity is Electrochemical capacitor.
- A kind of 5. rear-end warning system of hazardous materials transportation vehicle according to claim 1, it is characterised in that：The steering Detection unit selects GC03-SP3000 rotation direction sensors.
- A kind of 6. rear-end warning system of hazardous materials transportation vehicle according to claim 1, it is characterised in that：The throttle Pedal monitoring unit and the brake pedal monitoring unit select HT-PD pressure sensors.
- A kind of 7. rear-end warning system of hazardous materials transportation vehicle according to claim 1, it is characterised in that：The CAN Communication unit includes CAN transceiver, connector, the 14th~the 18th resistance, the tenth and the 11st electric capacity, wherein described CAN transceiver selects PCA82C250, and the connector is 9 needle connectors.
- A kind of 8. rear-end warning system of hazardous materials transportation vehicle according to claim 1, it is characterised in that：The acousto-optic Alarm unit includes tri-state buffers, buzzer, the second triode, the first~the 3rd light emitting diode and the 19th~the 20th Two resistance, wherein the tri-state buffers select the digit buffer 74LS244 of tri-state eight, first light emitting diode is green glow two Pole pipe, second light emitting diode are gold-tinted diode, and the 3rd light emitting diode is red diodes.
- A kind of 9. rear-end warning system of hazardous materials transportation vehicle according to claim 1, it is characterised in that：The button Input block plugs 4 × 4 keyboards from the pin of external 8, and the display unit selects external dot matrix LCD module JD12232A3, the brake unit select solenoid directional control valve.
- A kind of 10. rear-end warning system of hazardous materials transportation vehicle according to claim 1, it is characterised in that：The electricity Source power supply unit includes power supply, the first and second voltage-stablizers, the second diode and the 12nd~the 16th electric capacity, wherein the electricity Source is Vehicular accumulator cell, and first voltage-stablizer selects LM7805, and second voltage-stablizer selects LM1117, the two or two pole It is electrochemical capacitor to manage as Schottky diode, the 16th electric capacity.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711204021.5A CN107804228A (en) | 2017-11-27 | 2017-11-27 | A kind of rear-end warning system of hazardous materials transportation vehicle |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711204021.5A CN107804228A (en) | 2017-11-27 | 2017-11-27 | A kind of rear-end warning system of hazardous materials transportation vehicle |
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| CN201711204021.5A Withdrawn CN107804228A (en) | 2017-11-27 | 2017-11-27 | A kind of rear-end warning system of hazardous materials transportation vehicle |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110682872A (en) * | 2019-10-14 | 2020-01-14 | 深圳市蓝度汽车电控技术有限公司 | Automobile wake-up circuit and working method |
| CN111002904A (en) * | 2019-12-20 | 2020-04-14 | 铁将军汽车电子股份有限公司 | Front collision early warning system and configuration method and device thereof |
| CN111508237A (en) * | 2019-07-31 | 2020-08-07 | 深圳智慧车联科技有限公司 | Device and method for monitoring speed of large vehicle at intersection |
-
2017
- 2017-11-27 CN CN201711204021.5A patent/CN107804228A/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111508237A (en) * | 2019-07-31 | 2020-08-07 | 深圳智慧车联科技有限公司 | Device and method for monitoring speed of large vehicle at intersection |
| CN110682872A (en) * | 2019-10-14 | 2020-01-14 | 深圳市蓝度汽车电控技术有限公司 | Automobile wake-up circuit and working method |
| CN111002904A (en) * | 2019-12-20 | 2020-04-14 | 铁将军汽车电子股份有限公司 | Front collision early warning system and configuration method and device thereof |
| CN111002904B (en) * | 2019-12-20 | 2022-04-22 | 铁将军汽车电子股份有限公司 | Front collision early warning system and configuration method and device thereof |
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