CN103323851A - Automobile reversing two-dimensional ranging alarming system - Google Patents
Automobile reversing two-dimensional ranging alarming system Download PDFInfo
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- CN103323851A CN103323851A CN2013103013456A CN201310301345A CN103323851A CN 103323851 A CN103323851 A CN 103323851A CN 2013103013456 A CN2013103013456 A CN 2013103013456A CN 201310301345 A CN201310301345 A CN 201310301345A CN 103323851 A CN103323851 A CN 103323851A
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Abstract
The invention discloses an automobile reversing two-dimensional ranging alarming system. An ultrasonic ranging probe in horizontal direction and an ultrasonic ranging probe in vertical backward direction are simultaneously arranged at the tail part of the automobile so as to respectively range the distance of reflectors in rear horizontal direction and rear lower vertical direction; when the distance between the reflector in rear horizontal direction and the horizontal direction probe of the ultrasonic ranging device is less than the safety distance, a horizontal alarming device is capable of alarming; when the distance between the reflecting surface in rear lower direction and the rear lower probe of the ultrasonic ranging device is over the normal distance or the ultrasonic reflecting signal in rear lower direction is obviously weak, the vertical alarming device is capable of alarming, and sending out a brake signal simultaneously.
Description
Technical field
The present invention relates to the instrument that a kind of supersonic sounding is reported to the police, especially a kind of reversing automobile two dimension distance measurement alarm system.
Background technology
The radar for backing car of more existing automobiles, the main function of back-up video image backing distance measurement alarm system all are the crashproof purposes of horizontal direction during for reversing automobile.When the half congealed situation of dell, steep cliff or water was arranged during for reversing automobile behind, existing reversing automobile warning system can not correctly provide warning, thereby causes people, car dangerous situation to occur, and the protection system of automobile starts a leak.In recent years, some luxury cars can option and installment parking radar (before the car), automatic parking enters position, doubling servicing unit, and its principle is also similar with our common radar for backing car.But, when when reversing runs into the driver and not have the half congealed situation of dell, steep cliff or the water of discovery, also be helpless for automobile basically.
Summary of the invention
On the lacet in mountain area or area, tourist attractions curved multichannel is narrow in order to adapt to, the complex road condition on steep cliff abrupt slope; to avoid the defective of above-mentioned protection; two-dimentional distance measurement alarm system when the present invention has designed a kind of reversing automobile is to improve the operation safety coefficient of automobile.
When reversing automobile, the horizontal direction probe distance that reverberation and supersonic sounding device is arranged when horizontal direction is less than safe distance the time, and horizontal warning device will be reported to the police; And when the back lower place to reflecting surface and the paranormal distance of back lower place probe distance (that is: the situation of dell or steep cliff appears in the back lower place) of supersonic sounding device or the back lower place to ultrasonic reflection signal obviously when very weak (that is: the water surface of mirror-reflection appears doing ultrasonic signal in the back lower place), vertically warning device also can be reported to the police, and also can send the skidding signal simultaneously.Thereby reach the purpose of safety reversing under complex road condition.
Design concept of the present invention is according to as described below:
1. supersonic sounding principle: the ultrasound wave that the transmitting probe of ultrasonic generator sends is when running into reverberation, the ultrasound wave of reflection should be followed reflection law in principle, but the surface of general object is not very smooth, so in fact can live all directions with irreflexive form reflection at the ultrasound wave of coarse road reflection.Wherein inevitable some ultrasound wave can be reflected back former hyperacoustic launching site position.If the place is provided with again a ultrasonic receiving transducer at former ultrasound emission point, just can detect the echo that ultrasound wave directly reflects from reverberation.If send a pulse ultrasonic wave signal from the ultrasound wave transmitting probe, after interval of delta t after a while, from the ultrasound wave receiving transducer, receive again from the echoed signal of object reflection, then ultrasound wave the distance L of process should be: L=(V Δ t)/2.In the formula: V is hyperacoustic velocity of wave.
2. the nearest discrimination principles of reverberation: if only send a pulsating wave from the ultrasound wave transmitting probe, after after a while, from the ultrasound wave receiving transducer, in fact can receive successively the pulse signal of a plurality of reflections.This is because in the ultrasonic signal that receives direct reflected signal is arranged not only, arrives in addition the signal of receiving transducer between different reverberations behind Multi reflection again.But as long as ultrasound wave is to have made the reflex time more than the secondary from other object, when ripple arrives receiving transducer the distance of process will inevitably be greater than the distance that directly reflexes to receiving transducer from object, just have hysteresis phenomenon so arrive at echo on time of receiving transducer.According to this principle, first received reflected impulse signal of ultrasonic receiving transducer just can only be the echo that directly reflects from nearest object.Automobile is when reversing, if the back is a slice level land, transmit direction to the ultrasonic probe of the back lower place remains unchanged again, and then the distance of reverberation (object) will remain unchanged substantially recently, i.e. first pulse of ultrasonic echo should keep substantially constant with the time difference that transmits.But when a dell or steep cliff appear in the back lower place of automobile, the time difference of first reflected impulse will increase or disappear (reverberation consequently reflection wave too far away does not detect) singularly, just can judge in the behind of automobile according to this situation dell or steep cliff to have occurred.
3. the mirror-reflection principle of the half congealed water surface of water: if when reversing automobile, there is a water half congealed behind, then be approximately a minute surface because of the half congealed water surface of water, if the ultrasound wave of automobile tail is that directions with 45 degree are when launching to the back lower place, according to reflection law, the overwhelming majority from the ultrasound wave of water-reflected will reflect to 45 directions of spending to the back upper place of the water surface, just substantially not receive the echoed signal of water-reflected at original ultrasound emission end.
The present invention is according to above-mentioned principle, when first echo generation time difference that ultrasonic receiving transducer receives, obviously increase or echoed signal obviously died down suddenly suddenly, just can judge the situation that has dell, steep cliff or water half congealed behind, so reversing automobile two dimension distance measurement alarm system just sends different alerting signals or even skidding signal according to different dangerous situations.
The principle of the present invention's back-up alarm in the horizontal direction is identical with the principle of general warning device for reverse drive of vehicle, just no longer wads a quilt with cotton here and states.But in order to distinguish different reversing dangerous situations, the reverse alarming signal of two kinds of different directions must adopt different type of alarms.As automobile of the present invention two dimension distance measurement alarm system, the rearward supersonic sounding warning device of the both direction of horizontal direction and back lower place vertical direction should be installed independently at the afterbody of automobile simultaneously.
A kind of reversing automobile two dimension distance measurement alarm system of the present invention is comprised of two-dimensional ultrasound probe and range finding warning device, it is characterized in that: the supersonic sounding warning device that horizontal direction and vertical backward directions are installed simultaneously at the rear portion of automobile.
A kind of reversing automobile two dimension distance measurement alarm system of the present invention, it is characterized in that: two groups of supersonic sounding warning devices to horizontal direction and vertical backward directions work alone respectively and report to the police, and the aural signal of sending when reporting to the police is not identical.
A kind of reversing automobile two dimension distance measurement alarm system of the present invention is characterized in that: range finding warning device and measured object exceed normal distance range when reporting to the police, and can send respectively also that appropriateness is reminded, rapid warning, the rapid multi-signal such as skidding of reporting to the police.
A kind of reversing automobile two dimension distance measurement alarm system of the present invention is characterized in that: vertically the sensing of the ultrasonic distance measuring probe of warning device generally refers to the direction to about 45 degree of the back lower place.
The present invention solves the main technical schemes that its technical matters adopts: at automobile tail the ultrasonic distance measuring probe of horizontal direction and the vertical ultrasonic distance measuring probe of backward directions are installed simultaneously, to measure respectively the distance with rear horizontal direction and back lower place vertical direction reverberation, the horizontal direction probe distance that reverberation and supersonic sounding device is arranged when the rear horizontal direction is less than safe distance the time, and horizontal warning device will be reported to the police; And when the back lower place to reflecting surface and the paranormal distance of back lower place probe distance of supersonic sounding device or the back lower place to ultrasonic reflection signal when obviously very weak, vertically warning device also can be reported to the police, and also can send simultaneously the skidding signal.
The invention has the beneficial effects as follows: the safety guarantee function when having improved reversing automobile.
Description of drawings
Fig. 1 is the installation direction schematic diagram of two cover ultrasonic probes of this reversing automobile two dimension distance measurement alarm system.
1. the ultrasonic distance measuring probe of horizontal direction;
2. vertically the warning device back lower place to ultrasonic distance measuring probe.
Fig. 2 is the flow logic decisional block figure that analyzes echoed signal.
3. reversing automobile two dimension warning system
4. the ultrasound wave that sends of horizontal direction
5. the ultrasound wave that sends of vertical direction
6. receive echo
7. exceed normal distance range
8. appropriateness is reminded
9. hurriedly report to the police
10. rapid the warning sent the skidding signal
Specific embodiment:
Automobile tail be equipped with simultaneously both direction, supersonic sounding warning device independently, measure respectively the distance with rear horizontal direction and back lower place vertical direction reverberation.
The ultrasound wave that 1. ultrasonic distance measuring probe of horizontal direction sends in Fig. 1 be along continuous straight runs backward, from the vertical warning device back lower place to the ultrasound wave that 2. sends of ultrasonic distance measuring probe to the back lower place about 45 degree directions.When rear ground during to the ultrasonic signal diffuse reflection, from Fig. 1, be that former road is returned with regard to some in the represented reflection wave.When the back lower place of automobile was the water surface (minute surface), the ripple of reflection just only had to the water surface (minute surface) back upper place the approximately ripple of 45 degree directions, and just there be not (or very faint) in the diffuse reflection ripple of other direction.When reversing automobile, 3. computer instruction opens this reversing automobile two dimension warning system, horizontal direction backward 4. with vertical direction backward 5. supersonic sounding warning device start working.If horizontal direction has reverberation will receive echo 6., if echo show when the horizontal range of reverberation is not very near, 8. level range finding warning device just appropriateness is reminded, if when the horizontal range of reverberation is very near, 9. level range finding warning device just rapid the warning.And when vertical direction backward the distance of the back lower place probe of the reflecting surface of (be the back lower place to) and supersonic sounding device 7. time the or the back lower place that exceeds normal range to ultrasonic reflection signal obviously very weak, when not receiving echo, vertically warning device also can hurriedly be reported to the police, and also can send simultaneously the skidding signal 10..
Claims (4)
1. a reversing automobile two dimension distance measurement alarm system is comprised of two-dimensional ultrasound probe and range finding warning device, it is characterized in that: the supersonic sounding warning device that horizontal direction and vertical backward directions are installed simultaneously at the rear portion of automobile.
2. a kind of reversing automobile two dimension distance measurement alarm system according to claim 1, it is characterized in that: two groups of supersonic sounding warning devices to horizontal direction and vertical backward directions work alone respectively and report to the police, and the aural signal of sending when reporting to the police is not identical.
3. a kind of reversing automobile two dimension distance measurement alarm system according to claim 1, it is characterized in that: range finding warning device and measured object exceed normal distance range when reporting to the police, and can send respectively also that appropriateness is reminded, rapid warning, the rapid multi-signal such as skidding of reporting to the police.
4. according to claim 1,2,3 described a kind of reversing automobiles two dimension distance measurement alarm systems, it is characterized in that: vertically the sensing of the ultrasonic distance measuring probe of warning device generally refers to the direction to about 45 degree of the back lower place.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103013456A CN103323851A (en) | 2013-07-18 | 2013-07-18 | Automobile reversing two-dimensional ranging alarming system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103013456A CN103323851A (en) | 2013-07-18 | 2013-07-18 | Automobile reversing two-dimensional ranging alarming system |
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| CN103323851A true CN103323851A (en) | 2013-09-25 |
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| CN2013103013456A Pending CN103323851A (en) | 2013-07-18 | 2013-07-18 | Automobile reversing two-dimensional ranging alarming system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105128737A (en) * | 2015-08-27 | 2015-12-09 | 苏州经贸职业技术学院 | Ranging system for automobile |
| CN110422132A (en) * | 2019-07-31 | 2019-11-08 | 南宁学院 | A kind of automobile reversing radar system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6214077A (en) * | 1985-07-11 | 1987-01-22 | Nippon Denso Co Ltd | Ultrasonic distance measuring apparatus for vehicle |
| CN102478655A (en) * | 2010-11-23 | 2012-05-30 | 比亚迪股份有限公司 | Ultrasonic ranging method, ranging system and camera component with ranging system |
| CN102923055A (en) * | 2012-11-16 | 2013-02-13 | 浙江大学 | Car backing assisting system and method based on camera and ultrasonic sensor |
-
2013
- 2013-07-18 CN CN2013103013456A patent/CN103323851A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6214077A (en) * | 1985-07-11 | 1987-01-22 | Nippon Denso Co Ltd | Ultrasonic distance measuring apparatus for vehicle |
| CN102478655A (en) * | 2010-11-23 | 2012-05-30 | 比亚迪股份有限公司 | Ultrasonic ranging method, ranging system and camera component with ranging system |
| CN102923055A (en) * | 2012-11-16 | 2013-02-13 | 浙江大学 | Car backing assisting system and method based on camera and ultrasonic sensor |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105128737A (en) * | 2015-08-27 | 2015-12-09 | 苏州经贸职业技术学院 | Ranging system for automobile |
| CN110422132A (en) * | 2019-07-31 | 2019-11-08 | 南宁学院 | A kind of automobile reversing radar system |
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Application publication date: 20130925 |