CN204374417U - A kind of vehicle intelligent collision avoidance system - Google Patents
A kind of vehicle intelligent collision avoidance system Download PDFInfo
- Publication number
- CN204374417U CN204374417U CN201420500036.1U CN201420500036U CN204374417U CN 204374417 U CN204374417 U CN 204374417U CN 201420500036 U CN201420500036 U CN 201420500036U CN 204374417 U CN204374417 U CN 204374417U
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- China
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- beam splitter
- photodetector
- cemented doublet
- signal
- laser
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Abstract
The utility model provides a kind of vehicle intelligent collision avoidance system, comprising: driving circuit, laser instrument, cemented doublet, beam splitter, narrow band filter slice, photodetector, time measurement structural unit, signal amplifier, single chip computer architecture unit, comparer harmony, light alarm set.It is characterized in that: driving circuit, laser instrument, cemented doublet, beam splitter, narrow band filter slice, photodetector and time measurement structural unit are for measuring and recording twice mistiming that two bundle of pulsed laser arrives photodetector; Mistiming signal after signal amplifier process amplification calculates the Distance geometry relative velocity of Ben Che and front vehicles or pedestrian by single chip computer architecture element analysis; Comparer compares according to result of calculation and automobile brake distance, response time, carries out instant judgement and response, and carries out sound and optic signal prompting to driver in time by sound, light alarm set, prevent the generation of driving accident to running car.
Description
Technical field
The utility model relates to a kind of vehicle intelligent collision avoidance system, specifically relates to a kind of Distance geometry relative velocity knowing Ben Che and front vehicles, pedestrian based on pulse laser measuring principle, thus realizes the system preventing vehicle collision.
Background technology
Along with popularizing of vehicle, facilitate our daily life, but a series of safety problems brought also are arisen spontaneously.Occur repeatedly because the reasons such as poor visibility, road speed be fast cause traffic hazard, serious threat, to the security of the lives and property of people, therefore needs correlation technique to reduce the generation of such accident.Adopt the technological means such as radar, ultrasound wave to measure Ben Che and front vehicle speed and two spacings more in existing vehicle anti-collision system, then carry out data processing and remind driver to perform corresponding operating.But the price of radar costliness very, and easily by Electromagnetic Interference, less stable.Although ultrasound wave is cheap, easy and simple to handle, detection range is too short cannot find range when the spacings such as expressway are far away.Along with the Application and Development of semiconductor laser diode technology, the angle of divergence of pulse type laser is little, monochromaticity good, concentration of energy, detection range are far away, measure the advantage such as accurate be its to become range finding be best mode.
The utility model proposes for the problems referred to above, provides a kind of Distance geometry relative velocity knowing Ben Che and front vehicles or pedestrian based on pulse laser measuring principle, thus realizes the system preventing vehicle collision.
Summary of the invention
Collision avoidance system of the present utility model utilizes pulse laser to carry out testing the speed and then carry out analyzing according to measurement data the Distance geometry relative velocity drawing Ben Che and front vehicles or pedestrian, and compare according to judged result and automobile brake distance, response time, instant judgement and response are carried out to running car, and sound, light alarm set carry out sound and optic signal prompting to automobilist in time, to prevent the generation of driving accident.
The technical solution adopted in the utility model: a kind of vehicle anti-collision system, comprises signal acquiring system, data handling system, warning system.
Signal acquiring system comprises driving circuit, laser instrument, cemented doublet, beam splitter, narrow band filter slice, photodetector and time measurement structural unit.Wherein used laser instrument is 905nm pulsed laser; The peak wavelength of filter plate is 905nm, half-breadth 2nm, main peak deviation 0.5nm; Photodetector is avalanche photodide; Time measurement structural unit is the TDC-GP2 chip of German ACAM company.Major function utilizes pulse laser measuring principle, measures twice mistiming that two bundle of pulsed laser arrives photodetector respectively, measured respectively and record the measurement result of twice by TDC-GP2 chip.
Data handling system comprises signal amplifier and single chip computer architecture unit, the UA733 that wherein used signal amplifier is Texas Instruments, and single chip computer architecture unit is STC89C52 series monolithic.Major function be by twice mistiming collecting after signal amplifier amplifies, submit to single-chip microcomputer, after calculating by analysis, draw the Distance geometry relative velocity of Ben Che and front vehicles or pedestrian.
Warning system comprises comparer harmony, light alarm set, and wherein comparer is the MAX913 of MAXIM company.Major function is that comparer compares according to the Distance geometry relative velocity and automobile brake distance, response time of measuring this car and front vehicles or the pedestrian obtained, instant judgement and response are carried out to running car, and sound, light alarm set carry out sound and optic signal prompting to automobilist in time, to prevent the generation of driving accident.
The utility model provides a kind of vehicle intelligent collision avoidance system, comprising: driving circuit, laser instrument, first, second, third cemented doublet, first, second beam splitter, narrow band filter slice, photodetector, signal amplifier, data handling system and early warning system.905nm wavelength pulsed laser is launched by described driving circuit drive laser, pulse laser is focused into directional light through described first cemented doublet, this directional light is divided into two-beam by described first beam splitter, wherein a branch of through second cemented doublet focus on after irradiate to target object, the scattering laser that target object is reflected back is by described narrow band filter slice filtering clutter, through described 3rd cemented doublet, then arrive described photodetector by described second beam splitter; Through the other light beam that described first beam splitter light splitting produces, described photodetector is arrived after described second beam splitter reflection, described photodetector detection light signal, and convert electric signal to, pass to described data handling system, described early warning system is reported to the police according to the signal of data handling system.
Due to laser light beam intensity, good directionality, its distance that tests the speed is far away relative to radar velocity measurement coverage, can survey outside 1km; Rate accuracy is high, and error is less than 1km/h; The laser instrument used in addition is 905nm pulsed laser, can not damage human eye, and can not be disturbed by the infrared light in natural spectrum.
Accompanying drawing explanation
Fig. 1 is the utility model one-piece construction schematic diagram
Description of reference numerals:
1-first cemented doublet
2-first beam splitter
3-second cemented doublet
4-second beam splitter
5-the 3rd cemented doublet
6-narrow band filter slice
Embodiment
Ultimate principle of the present utility model: utilize Laser emission and Received signal strength to utilize pulse laser measuring principle by signal acquiring system, measure the mistiming that two bundle of pulsed laser arrives photodetector respectively, judged by the Distance geometry relative velocity of data handling system to Ben Che and front vehicles or pedestrian according to gained signal again, finally data results is transferred to warning system, driver is given mutually at the sound, light prompting.The utility model embodiment is as follows:
First, under driving circuit effect, 905nm pulsed laser sends one section of pulse laser I by cemented doublet 1, and be focused to directional light and launch, then a part of light reflexes to photodetector through beam splitter 2,4, and this is timing start time t1; After major part light transmission beam splitter 2 after cemented doublet 3 converges homed on its target object, then the scattered light that reflects of target object is first by narrow band filter slice 6 filtering clutter, again by cemented doublet 5 by faint reflected light converging light electric explorer, this is timing finish time t2.In like manner, laser instrument sends one section of pulse laser II again, the timing start time t3 corresponding to it and timing finish time t4.Start time and timing finish time and t1, t2 and t3, t4 when TDC-GP2 chip is measured respectively and records twice meter.
Then, the timing start time that twice measurement is obtained and timing finish time and t1, t2 and t3, t4, single chip computer architecture unit is transferred to after UA733 type signal amplifier amplifies, the distance that can be obtained twice measurement by the analysis of STC89C52 type single-chip microcomputer is respectively S1=(t2-t1) c/2 and S2=(t4-t3) c/2, and then draws the Distance geometry relative velocity of this time period Nei Benche and front vehicles or pedestrian.
Finally, data handling system is transferred to warning system by analyzing the result obtained, MAX913 type comparer can compare according to the Distance geometry relative velocity and automobile brake distance, response time measuring this car and front vehicles or the pedestrian obtained, instant judgement and response are carried out to running car, and sound, light alarm set carry out sound and optic signal prompting to automobilist in time, in order to avoid the generation of driving accident.
Above-described hardware material is the common model of this area; and be only preferred embodiment of the present utility model; not the present invention is imposed any restrictions; every above embodiment is done according to the utility model essence any simple modification, change and equivalent structure transformation, all still belong in the protection domain of technical solutions of the utility model.
Claims (1)
1. a vehicle intelligent collision avoidance system, comprise: driving circuit, laser instrument, first, second, 3rd cemented doublet, first, second beam splitter, narrow band filter slice, photodetector, signal amplifier, data handling system and early warning system, it is characterized in that: launch 905nm wavelength pulsed laser by described driving circuit drive laser, pulse laser is focused into directional light through described first cemented doublet, this directional light is divided into two-beam by described first beam splitter, wherein a branch of through second cemented doublet focus on after irradiate to target object, the scattering laser that target object is reflected back is by described narrow band filter slice filtering clutter, through described 3rd cemented doublet, described photodetector is arrived again by described second beam splitter, through the other light beam that described first beam splitter light splitting produces, described photodetector is arrived after described second beam splitter reflection, described photodetector detection light signal, and convert electric signal to, pass to described data handling system, described early warning system is reported to the police according to the signal of data handling system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420500036.1U CN204374417U (en) | 2014-08-29 | 2014-08-29 | A kind of vehicle intelligent collision avoidance system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420500036.1U CN204374417U (en) | 2014-08-29 | 2014-08-29 | A kind of vehicle intelligent collision avoidance system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204374417U true CN204374417U (en) | 2015-06-03 |
Family
ID=53330625
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420500036.1U Expired - Fee Related CN204374417U (en) | 2014-08-29 | 2014-08-29 | A kind of vehicle intelligent collision avoidance system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204374417U (en) |
-
2014
- 2014-08-29 CN CN201420500036.1U patent/CN204374417U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150603 Termination date: 20160829 |