CN102785660A - Vehicle collision-proof early warning device - Google Patents
Vehicle collision-proof early warning device Download PDFInfo
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- CN102785660A CN102785660A CN2012102922688A CN201210292268A CN102785660A CN 102785660 A CN102785660 A CN 102785660A CN 2012102922688 A CN2012102922688 A CN 2012102922688A CN 201210292268 A CN201210292268 A CN 201210292268A CN 102785660 A CN102785660 A CN 102785660A
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Abstract
The invention discloses a vehicle collision-proof early warning device, which is mainly and technically characterized in that the vehicle collision-proof early warning device comprises an image acquisition module, an image processing module, a millimeter microwave radar speed and distance measuring device, an ultrasonic sensor, a speed sensor, a brake sensor, an accelerator sensor, a steering sensor, a single-chip microcomputer and an early warning device, wherein the image acquisition module is used for acquiring information at the front of a vehicle and transmitting the information to the image processing module, the image processing module processes the information and then transmits the information to the single-chip microcomputer, the millimeter microwave radar speed and distance measuring device simultaneously transmits measured relative distance and relative speed between an ahead vehicle and the vehicle on which the vehicle collision-proof early warning device is installed to the single-chip microcomputer, the ultrasonic sensor transmits the measured speed of the vehicle on which the vehicle collision-proof early warning device is installed, the single-chip microcomputer processes the image information and the distance and speed data and then judges whether the vehicle is in a warning critical state or not, and finally a result processed by the single-chip microcomputer is displayed through the early warning device. The vehicle collision-proof early warning device has the advantages that the false warning rate of the early warning device is effectively reduced, the accidents such as rear-end collision are reduced and the transport efficiency is improved.
Description
Technical field
The invention belongs to the automobile active safety technical field, particularly a kind of preventing collision of vehicles hits prior-warning device.
Background technology
Automobile has changed people's life style as modern humans's the vehicle, has promoted the progress of The development in society and economy and human culture, brings great convenience for people's life, but has also brought serious traffic safety problem simultaneously.Enquiry data according to the Red Cross: the number that road traffic accident is died from the whole world every year reaches 800,000 people, and other has 1500-2000 ten thousand people injured, and the annual economic loss that causes because of road traffic accident is about 5,580 hundred million dollars.Road traffic accident has all brought tremendous loss for family, collective and country, becomes world's serious social concern.
At present, the road conditions of China is constantly perfect, and the average ground speed of vehicle also promotes day by day.Accordingly; People also more and more pay attention to the safety problem of running car; Especially under the state of running at high speed, people generally only depend on the personal experience to judge that stopping distance under the current vehicle speed keeps the spacing with front truck, but often because a variety of causes makes people produce false judgment; Particularly under situation such as new hand's driving, fatigue state, furious driving, the probability that produces false judgment is higher.So, confirm and the rational spacing of maintenance, be the best Active Defending System Against that avoids traffic accident, also be the important assurance of driving.
Along with developing of automobile industry, the traffic safety device is greatly developed, and quickens to trackslip and EBS electronic braking force distribution device or the like like, safety strap, safety air bag, ABS anti-embracing unit, ARS.In essence, its function can only alleviate the degree of accident, can not prevent the generation of accident effectively.Factors such as automobile collision accident is too fast because of road speed mostly, vehiclar gap is too small, brake is untimely cause.Therefore, automobile installs the anticollision early warning additional and dead-man's device can significantly reduce accidents such as chaufeur knocks into the back generation, plays the effect of escorting, and minimizing traffic accident, promotion safety traffic, raising traffic efficiency are all had great realistic meaning.People more and more is recognized; How to utilize pioneering technology; Car assisted driver monitors in real time environment such as the people that influences highway traffic safety, car, roads and reports to the police; Under emergency situation, carry out emergency handling, prevent the generation of automobile collision accident, seem particularly important by system's pro-active intervention riding manipulation, driver assistance person.
The vehicle anticollision system is the active automobile safety system of a kind of intellectuality, it can remedy the people perception, judge even control the deficiency of aspect.The greatest problem that the vehicle anticollision system need solve is exactly The Recognition of Multiple Targets problem and false-alarm problem.Because the working environment of anti-collision system for automobile is the complex environment of dynamic, multiobject, a wide detection range, how distance, relative velocity and azimuth between them are differentiated and accurately measured to multiple goal, will face very big challenge.
The method in a kind of analysis comparatively commonly used at present and the judgement vehicle front visual field is: use the video image of two camera collection vehicle fronts, according to the parallax of two cameras, confirm a plurality of obstacle targets of vehicle front; For example; Traffic sign, pedestrian, vehicle and other obstacle, and definite obstacle clarification of objective information, for example; The distance of the size of target and target range vehicle etc., and in view of the above the driver is reported to the police.The problem that this method exists is, can't realize the analysis to the vehicle front visual field accurately, and the collection of video image receives the influence of weather conditions easily, causes producing bigger error, can't carry out early warning to the driver accurately.Confirm and the purpose that maintains safe distance in order to reach; In recent years; Various vehicles is crashproof, range only radar etc. occurs in succession; Their common ground is to judge whether to need to report to the police or braking with distance or the relative velocity of surveying between objects in front and the automobile between automobile and object, and has ignored speed of response and current driving situation and the road surface situation consideration of driver to accident.Therefore, judge, exist bigger rate of false alarm, and bigger rate of false alarm is with heavy damage vehicle driver and passenger's traveling comfort and awareness of safety though they have helped people to carry out spacing to a certain extent.
Summary of the invention
The objective of the invention is to overcome the deficiency of prior art; Provide a kind of and confirmed own car the place ahead obstacle type according to the CCD camera; Measure from the relative distance of car and obstacle by distance measuring equipment (DME) and to measure the own car speed of a motor vehicle, then data are sent to micro controller system, handle by micro controller system and whether afterwards adjudicate the preventing collision of vehicles that chaufeur is carried out sound and light alarm and hit prior-warning device with relative velocity and through speed sensor; It has reduced rate of false alarm effectively, has improved communications and transportation efficient.
The present invention solves its technical matters and takes following technical scheme to realize:
A kind of preventing collision of vehicles hits prior-warning device, and its major technique is characterised in that: comprise image capture module, image processing module, millimeter microwave radar velocity measurement distance measuring equipment (DME), ultrasonic transduter, speed sensor, braking sensor, throttle sensor, rotation direction sensor, micro controller system and prior-warning device; Wherein, The information in image capture module collection vehicle the place ahead sends to image processing module, and image processing module sends to micro controller system after handling, and millimeter microwave radar velocity measurement distance measuring equipment (DME) sends to micro controller system with the relative distance and the relative velocity data of front truck that records and own car simultaneously; Self speed of a motor vehicle that ultrasonic transduter will record sends to micro controller system; After micro controller system processing image information and distance and the speed data, judge whether vehicle is in the warning critical conditions, and show through prior-warning device.
And described image capture module adopts the CCD camera.
And described image processing module adopts the DSP image processing module.
And described speed sensor adopts the Hall car speed sensor.
And described micro controller system adopts the AT89C52 micro controller system.
And described prior-warning device comprises LCD display module, indicator lamp and voice output module.
And described indicator lamp comprises red indicating light, green indicating lamp and yellow indicator lamp.
And described voice output module comprises VODER, power amplifier and loudspeaker, and wherein, VODER connects power amplifier, and power amplifier connects loudspeaker.
Advantage of the present invention and good effect are:
1, the present invention utilizes CCD camera and DSP image processing module to confirm a plurality of obstacle targets of vehicle front; Record the relative distance and the speed of own car and obstacle then through millimeter microwave radar velocity measurement distance measuring equipment (DME); The rate of false alarm that can actv. reduces prior-warning device; Reduce the generation of accidents such as rear-end impact, improve communications and transportation efficient, realize the collision prevention of vehicle early warning exactly.
2, vehicle anticollision prior-warning device of the present invention can remind chaufeur note before accident takes place, and in case of emergency helps the chaufeur Control of Automobile that takes safety measures, and automobile can initiatively be averted danger, the assurance vehicle safe driving.Device utilizes modern information technologies, sensing technology to expand the perception of chaufeur; The external information that cognition technology is obtained: like traffic lane line, pass to chaufeur with parameters such as the relative distance of other obstacles, vehicle, relative velocities; Whether identification constitutes potential safety hazard in the integrated information of road conditions and vehicle condition simultaneously, scents a hidden danger in time to remind chaufeur.Research proof during dangerous situation, if can give the pretreatment time of chaufeur half second, then can reduce rear-end collision 30%, the relevant accident 50% in road surface, car accident 60% head-on respectively more.If can before accident takes place, in time remind chaufeur to note emergency situation, very useful beyond doubt to reducing the traffic accident generation, and the vehicle collision prewarning system realizes the important means of this function.
Description of drawings
Fig. 1 is the system architecture diagram of the embodiment of the invention.
The specific embodiment
Below in conjunction with accompanying drawing the embodiment of the invention is done further detailed description:
A kind of preventing collision of vehicles hits prior-warning device, and its major technique is characterised in that: comprise image capture module, image processing module, millimeter microwave radar velocity measurement distance measuring equipment (DME), ultrasonic transduter, speed sensor, braking sensor, throttle sensor, rotation direction sensor, micro controller system and prior-warning device; Wherein, The information in image capture module collection vehicle the place ahead sends to image processing module, and image processing module sends to micro controller system after handling, and millimeter microwave radar velocity measurement distance measuring equipment (DME) sends to micro controller system with the relative distance and the relative velocity data of front truck that records and own car simultaneously; Self speed of a motor vehicle that ultrasonic transduter will record sends to micro controller system; After micro controller system processing image information and distance and the speed data, judge whether vehicle is in the warning critical conditions, and show through prior-warning device.
In conjunction with Fig. 1, set forth principle of work of the present invention:
Total system is made up of information acquisition unit, micro controller system, prior-warning device.Information acquisition unit is used for gathering needed data of various systems and switching value in the car load driving process, and micro controller system is used for receiving the data that information acquisition unit sends, and data are carried out judgment processing, and then sends to prior-warning device.
Utilization is installed in millimeter microwave radar velocity measurement distance measuring equipment (DME) on the automobile and measures in real time from information such as the distance of car and the place ahead target and relative velocities, and feeds back to micro controller system rapidly; Utilize vehicle-mounted Hall car speed sensor to record GES, send into micro controller system and handle calculating, calculate the real-time speed value; The braking and turn to form to be input to micro controller system with switching value; Information acquisition unit sends to micro controller system to the information of all the sensors; Micro controller system carries out judgment processing according to the data of gathering to current traffic safety state; And provide result, send to prior-warning device to the result who handles well then; Prior-warning device is according to the information that sends, and display speed and distance can be reported to the police if vehicle is in unsafe condition accordingly in real time.
Processor of single chip computer AT89C52 judges whether to report to the police and type of alarm according to detecting distance and speed.Native system adopts the high-quality integrated speech chip I SD1420 of American I SD company to realize voice suggestion and warning function; The ISD1420 chip is monolithic voice record, memory integrated chip; Sheet includes eeprom memory, can record continuously, also can carry out the segmentation recording.Through segmentation recording and playback, can send different alarms.Warning is divided into Three Estate, adopts twice warning, wherein, if actual measurement distance greater than reminding alarm apart from the time, system does not report to the police, just green light flicker reminds navigating mate to note, can not take any measure, is the safe driving state; If the actual measurement spacing less than reminding alarm distance and greater than danger warning apart from the time, when indicator lamp showed the amber light flicker, piping of loudspeaker appearred, be the reminding alarm state, remind chaufeur need unclamp Das Gaspedal; If the actual measurement spacing less than danger warning apart from the time, indicator lamp shows that blinking red lamp and loudspeaker can send long time of alarm, is precarious position, requires the chaufeur must emergency braking, otherwise just might dangerous generation.
Micro controller system collection vehicle and obstacle distance and the Ben Che speed of a motor vehicle; And with the corresponding speed of a motor vehicle under safety distance compare with danger range; Whether the distance of judging automobile and obstacle safety, when the security alarm that reaches setting apart from the time, micro controller system is reported to the police to the warning port output signal; If the driver does not take corresponding slowing-down brake measure; The data that this moment, throttle sensor sent to micro controller system do not reduce, and singlechip controller sends drive signal to automatic slow down device, change the engine air throttle aperture automatically and go slowly to realize slowing down; Too fast like the speed of a motor vehicle, cause the distance of Ben Che and obstacle too small, get into when setting the danger range critical conditions, singlechip controller sends the emergency auto braking drive signal, opens automatic brake arrangement to realize emergency brake.
It is emphasized that; Embodiment of the present invention is illustrative; Rather than it is determinate; Therefore the present invention is not limited to the embodiment described in the specific embodiment, and every other embodiments that drawn by those skilled in the art's technical scheme according to the present invention belong to the scope that the present invention protects equally.
Claims (8)
1. a preventing collision of vehicles hits prior-warning device, and its major technique is characterised in that: comprise image capture module, image processing module, millimeter microwave radar velocity measurement distance measuring equipment (DME), ultrasonic transduter, speed sensor, braking sensor, throttle sensor, rotation direction sensor, micro controller system and prior-warning device; Wherein, The information in image capture module collection vehicle the place ahead sends to image processing module, and image processing module sends to micro controller system after handling, and millimeter microwave radar velocity measurement distance measuring equipment (DME) sends to micro controller system with the relative distance and the relative velocity data of front truck that records and own car simultaneously; Self speed of a motor vehicle that ultrasonic transduter will record sends to micro controller system; After micro controller system processing image information and distance and the speed data, judge whether vehicle is in the warning critical conditions, and show through prior-warning device.
2. preventing collision of vehicles according to claim 1 hits prior-warning device, it is characterized in that: described image capture module adopts the CCD camera.
3. preventing collision of vehicles according to claim 1 hits prior-warning device, it is characterized in that: described image processing module adopts the DSP image processing module.
4. preventing collision of vehicles according to claim 1 hits prior-warning device, it is characterized in that: described speed sensor adopts the Hall car speed sensor.
5. preventing collision of vehicles according to claim 1 hits prior-warning device, it is characterized in that: described micro controller system adopts the AT89C52 micro controller system.
6. preventing collision of vehicles according to claim 1 hits prior-warning device, it is characterized in that: described prior-warning device comprises LCD display module, indicator lamp and voice output module.
7. hit prior-warning device according to claim 1 or 6 described preventing collision of vehicles, it is characterized in that: described indicator lamp comprises red indicating light, green indicating lamp and yellow indicator lamp.
8. hit prior-warning device according to claim 1 or 6 described preventing collision of vehicles, it is characterized in that: described voice output module comprises VODER, power amplifier and loudspeaker, and wherein, VODER connects power amplifier, and power amplifier connects loudspeaker.
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Application publication date: 20121121 |