CN2468062Y - Anti-collision millimeter wave radar for vehicle - Google Patents
Anti-collision millimeter wave radar for vehicle Download PDFInfo
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- CN2468062Y CN2468062Y CN 01211040 CN01211040U CN2468062Y CN 2468062 Y CN2468062 Y CN 2468062Y CN 01211040 CN01211040 CN 01211040 CN 01211040 U CN01211040 U CN 01211040U CN 2468062 Y CN2468062 Y CN 2468062Y
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Abstract
The utility model relates to an anti-collision millimeter wave radar device for vehicles, which belongs to the technical field of the vehicle protection. The utility model is characterized in that the anti-collision millimeter wave radar device for vehicles is mainly composed of the parts of an antenna, a receiving transmitting component, an intermediate frequency amplifier, a signal processor, an alarm, a display, a function generator, a power supply, etc., wherein, the antenna is a common small-sized horn antenna for receiving and transmitting; the receiving transmitting component is a duplex homodyne-shaped waveguiding structure using a waveguide circulator to finish receiving and transmitting; the intermediate frequency amplifier takes the compression technology of dynamic range in intermediate frequency signal field; the linearity of the function generator is controlled within 0.5 percent and is triangular wave with adjustable amplitude and frequency. The utility model can solve the problem of rear-end collision prevention within different distance of 1-110 meters when the vehicles run.
Description
The utility model relates to a kind of millimeter-wave automotive anti-collision radar device, mainly solves this technical matters of preventing collision in the running car.The utility model belongs to the automobile protective technical field.
People more and more pay attention to improving the running safety problem, and anti-collision system for automobile is very important to improving ride safety of automobile.In statistics of traffic accidents, about 85% rear-end collision collision is because driver's carelessness and automobile are followed too closely.In order to reduce casualties and the property loss that car crass and car crass bring, the technology that adopts aspect vehicle safety travel is a lot of at present, for example, strengthen structure, the installation driving safety band of automobile and increase air bag etc., but these passive modes have only solved the protection question behind the car crass, fundamentally do not solve the automobile collision preventing problem.Since 1971, the active vehicle anticollision system of multiple modes such as ultrasound wave, laser, infrared, microwave appearred.But, optics and infrared cigarette, rain, the mist etc. of being subject to.Microwave resolution is low, and ground clutter is big, unless strengthen antenna aperture, and this is unallowed on the limited automobile in space.All fail on automobile large-scale popularization and use.And Back end data handles and to adopt single-chip microcomputer or simple digital circuit basically, finishes the range sensing of target with the method for counting, Target Recognition ability like this, and precision is low, and false alarm rate height and real-time are bad.Millimetre-wave radar compare with other radars have in light weight, volume is little and characteristics such as round-the-clock, so become the focus of Recent study and development.At present, the company that carries out the Automobile Millimeter Wave Radar systematic study mainly concentrates on the U.S., Japan and European, and has developed the product that can use for entrucking.The Eaton company of the U.S. in 1993 develops EVT-300 anticollision radar warning system.The vehicle radar system of Benz company in 1997 is won the innovation in industry prize of Germany.Domestic research to car radar is in the starting stage, does not still have corresponding product and goes on the market.
The purpose of this utility model is to provide a kind of millimeter-wave automotive anti-collision radar device, and it has characteristics such as in light weight, that volume is little, and reliable operation, resolution are high and round-the-clock.
The purpose of this utility model is by following scheme implementation: at first survey distance and speed with front vehicles, show in real time, automatically make safe thresholding according to the automobile brake equation again,, then send sound and light alarm information to the driver when the distance between two cars during less than the safety door limit value.
The utility model has adopted the millimetre-wave radar technology of 35GHz, and its radio frequency bandwidth is big, thereby the range resolution height.Antenna and part dimension are little, are applicable on the limited automobile in space to install.It is low to have the intercepting and capturing rate simultaneously, and penetration power is strong, ground clutter is relatively low and can adapt to harsh climate condition (cigarette, cloud, rain, mist) etc., and antenna beam is narrow, and gain is high, and antijamming capability is strong.Adopt Continuous Wave with frequency modulation (FMCW) radar system, have with respect to the pulse system that required emissive power is low, signal processing complexity low and remarkable advantage with low cost.
A major advantage of the present utility model is exactly by calculating the passing time of Doppler frequency-shift and a certain moment received signal, measuring testee relative velocity and distance.Therefore, not only to moving object, even when the main speed of a motor vehicle is very low, stationary object also had splendid detection performance.
The millimeter wave radameter that the utility model provides mainly by antenna, transmitting-receiving subassembly, in put, signal Processing, warning and seven unit such as demonstration, function generator and power supply form.Wherein:
(1) this device adopts the compact horn antenna of transmit-receive sharing, and purpose is to reduce volume, reduces cost, and gain is 26 decibels.
(2) transmitting-receiving subassembly is finished transmission duplex " homodyne type " waveguiding structure with waveguide junction circulator, and promptly same oscillation source is not only made emissive source but also receive local oscillator, and this modular construction is simply compact, realizes that easily cost is low, and its emissive power is 40mW.
(3) its operating distance of millimeter-wave automotive radar collision radar installations of providing of the utility model is 1～110 meter, for so big bandwidth, the system of high-gain characteristics, realize that the wide bandpass filtering of nearly 100 octaves is quite difficult, for the wide like this intermediate frequency dynamic range of 80dB, the spectrum secondary lobe that might make the closely saturated or close-in target of receiver floods the spectrum main lobe of distant object, so, for avoiding losing of signal in the output voltage, the utility model has taked the compression technique of intermediate-freuqncy signal Domain Dynamic scope to reduce dynamic range, so that better detect target.And then adopt automatic gain to control and satisfy of the requirement of A/D transducer the system dynamics scope.Wherein put principle as shown in Figure 2.
(4) signal processing is based on the high-speed programmable digital information processing system of the TMS320C5402 of TI company, mainly be that the signal that runs out in the front end transmitting-receiving subassembly warp is handled, under the signal background of complexity, eliminate unwanted signal (as clutter) and detect useful radar detection echo signal, have good real-time and program-controlled property.This part also comprises amplification, filtering, signal level transfer and analog to digital conversion etc.Its theory diagram as shown in Figure 3.
(5) partly to produce a linearity good for function generator of the present utility model, the triangular wave of amplitude and frequency adjustable.Adopt numeral and analog hybrid, and have temperature-compensation circuit, the linearity is controlled in 0.5% with the condition influence that is seasoned to the rigorous climate.
(6) sound and light alarm of different frequency is carried out in warning and display part to the risk object of 1～110 meter different distance.Carry out sound and light alarm with the 2Hz frequency in 1～50 meter distance range, 50～110 meters distance ranges are interior with 1Hz frequency sound and light alarm.
(7) power unit the 12V voltage of input can be converted to respectively+12V ,-12V, 8V, 5V etc. satisfy the voltage requirements of different units.
Performance index of the present utility model:
Working environment :-40 ° /+80 °
Maximum operating range: 110m
Minimum range: 1m
Detection accuracy: ± 0.125 (1～110) m
Velocity resolution:＜5Km/h
Refreshing frequency: 20Hz
Power supply :+12V single power supply;
Output: digital range of a signal and speed sound and light alarm
Below in conjunction with accompanying drawing and preferred embodiment characteristics of the present utility model and progress are further elaborated.
Fig. 1 is a structural drawing of the present utility model.
Put principle schematic among Fig. 2 Fig. 1.
Fig. 3 is the signal Processing theory diagram among Fig. 1.
1. antennas among the figure; 2. transmitting-receiving subassembly; 3. put in; 4. signal Processing; 5. report to the police and demonstration; 6. function generator; 21. circulator; 22. coupling mechanism; 23. voltage controlled oscillator; 24. frequency mixer; 31. intermediate frequency input; 32. Linear Network; 33. automatic gain control amplifier; 34. intermediate frequency output; 321. low noise amplifier; 322. linear compression; 323. isolate; 331. gain controlled amplifier; 332. feedback element; 41. AFE (analog front end); 42. power module; 43. analog to digital conversion; 44. digital signal processing; 45. hardware reset; 46. program storage; 47.JTAG debug port; 48. serial ports; 49. data expansion.
As shown in Figure 1, it is that 0.5% triangular wave with interior amplitude and frequency adjustable is input to the voltage controlled oscillator 23 in the transmitting-receiving subassembly 2 that function generator 6 produces a linearity, make it to produce the millimeter-wave signal that a frequency changes by the triangular wave rule, through coupling mechanism 22 and circulator 21, launch by antenna 1, run into target and return again and receive by antenna 1, after circulator 21 is finished isolation with emission signal, a part of power that 22 couplings transmit with coupling mechanism enters frequency mixer 24 and carries out mixing, put the distance that 3 entering signals processing 4 detects the useful detection of a target in the signal warp after the mixing, and judge whether less than the safety door limit value, send into afterwards and report to the police and display unit 5 shows and reports to the police.And for example shown in Figure 2, middle place system is to give Linear Network 32 intermediate frequency of frequency mixer 24 in the transmitting-receiving subassembly 2 input 31, amplify 33 through automatic gain control and intermediate frequency is exported the requirement of 34 dynamic ranges to satisfy the A/D transducer, Linear Network 32 is by low noise amplifier 321 and linear compression 322 and isolate 323 and constitute, and automatic gain control amplifier 33 is that gain controlled amplifier 331 and feedback element 332 are formed.And for example shown in Figure 3, signal processing system be in the intermediate frequency output 34 of putting send into AFE (analog front end) 41 and amplify, filtering and current potential translation, become digital signal to give the calculating that digital signal processing 44 is carried out identification of targets and distance and speed analog signal conversion through analog to digital conversion 43, again needed data line of digital display plate and control line are given warning and shown 5 by data expansion slot 49, program storage 46 storage system applications programs wherein, hardware reset 45 makes system reset, power supply 42 provides+12V, + 5V, + 3.3V, the different electric pressures of+1.8V are supplied with different chips, JTAG debug port 47 is used for online programming and debugged program, and serial ports 48 is used for the serial communication of this device and PC.
Claims (10)
1. millimeter-wave automotive anti-collision radar device, it is characterized in that this device mainly by antenna, transmitting-receiving subassembly, in put, signal Processing, warning and demonstration, function generator and power supply form.
2. by the described millimeter-wave automotive anti-collision radar device of claim 1, it is characterized in that described antenna is the compact horn antenna of transmit-receive sharing.
3. by the described millimeter-wave automotive anti-collision radar device of claim 1, it is characterized in that described transmitting-receiving subassembly finishes transmission duplex " homodyne type " waveguiding structure with waveguide junction circulator, same oscillation source is not only made emissive source but also accept local oscillator, and emissive power is 40mW.
4. by the described millimeter-wave automotive anti-collision radar device of claim 1, it is characterized in that putting the compress technique of having taked intermediate-freuqncy signal Domain Dynamic scope in described; And then adopt automatic gain control to satisfy of the requirement of A/D transducer to the system dynamics scope; Signal Processing is based on the high-speed programmable digital information processing system of TMS320C5402.
5. by the described millimeter-wave automotive anti-collision radar device of claim 1, it is good to it is characterized in that described function generator produces the linearity, the triangular wave of amplitude and frequency adjustable and employing temperature-compensation circuit; The linearity is controlled in 0.5%.
6. by the described millimeter-wave automotive anti-collision radar device of claim 1, it is characterized in that described warning and show the sound and light alarm that can carry out different frequency the risk object in 1～110 meter different distance.
7. by the described millimeter-wave automotive anti-collision radar device of claim 1, it is characterized in that described power module can with input+12V voltage converts+12V-12V, 8V, 5V respectively to.
8. by claim 1 or 2 or 3 or 5 described millimeter-wave automotive anti-collision radar devices, the triangular wave that it is characterized in that amplitude that function generator produces and frequency adjustable is input to the voltage controlled oscillator in the transmitting-receiving subassembly, produce a frequency and press the millimeter-wave signal that the triangular wave rule changes, through coupling mechanism and circulator, launch by antenna, run into target and return again and receive by antenna, through circulator finish and the isolation that transmits after, be coupled with coupling mechanism, the a part of power that transmits enters frequency mixer and carries out mixing, puts into into signal Processing in the warp then.
9. by claim 1 or 4 described millimeter-wave automotive anti-collision radar devices, it is characterized in that place system is to give Linear Network the input of the intermediate frequency of frequency mixer in the transmitting-receiving subassembly, after automatic gain control is amplified to satisfy of the requirement of A/D transducer to the intermediate frequency out-put dynamic range, Linear Network is made of low noise amplifier and linear compression and isolation, and automatic gain control amplifier is that gain controlled amplifier and feedback element are formed.
10. by claim 1 or 4 described millimeter-wave automotive anti-collision radar devices, it is characterized in that described signal processing system be in the intermediate frequency output of putting send into earlier that AFE (analog front end) is amplified, filtering and current potential translation, become digital signal to give digital signal processing analog signal conversion through analog to digital conversion again, carry out the calculating of identification of targets and distance and speed, give warning and demonstration with needed data line of digital display plate and control line by the data expansion slot again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01211040 CN2468062Y (en) | 2001-03-09 | 2001-03-09 | Anti-collision millimeter wave radar for vehicle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01211040 CN2468062Y (en) | 2001-03-09 | 2001-03-09 | Anti-collision millimeter wave radar for vehicle |
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| CN2468062Y true CN2468062Y (en) | 2001-12-26 |
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| CN 01211040 Expired - Fee Related CN2468062Y (en) | 2001-03-09 | 2001-03-09 | Anti-collision millimeter wave radar for vehicle |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100366457C (en) * | 2003-05-29 | 2008-02-06 | 现代自动车株式会社 | Apparatus for controlling distance between vehicles |
| CN101793964A (en) * | 2010-03-09 | 2010-08-04 | 浙江大学 | 60GHz millimeter-wave automotive anti-collision radar device with digitized temperature compensation |
| CN102897156A (en) * | 2012-10-22 | 2013-01-30 | 安徽省鸿运机械制造有限公司 | Intelligent slowing system for vehicle |
| CN102947725A (en) * | 2010-06-17 | 2013-02-27 | 三菱电机株式会社 | Radar device |
| CN103207395A (en) * | 2013-03-26 | 2013-07-17 | 南京理工大学 | Driving anti-collision radar device for automobile |
| CN104094134A (en) * | 2012-01-19 | 2014-10-08 | 罗伯特·博世有限公司 | Method and environment detection device for determining the position and/or the movement of at least one object in the environment of vehicle by means of acoustic signals reflected by the object |
| CN104656079A (en) * | 2013-11-21 | 2015-05-27 | 中国科学院沈阳自动化研究所 | Long-distance radar collision detection device and method |
| CN105527303A (en) * | 2015-12-04 | 2016-04-27 | 深圳大学 | Method and system for detecting material by using millimeter waves |
| CN106799992A (en) * | 2017-03-14 | 2017-06-06 | 南宁市高光信息技术有限公司 | A kind of automobile stabilization system based on LFMCW millimeter waves |
| CN110907935A (en) * | 2019-12-05 | 2020-03-24 | 西安戴森电子技术有限公司 | Vehicle-mounted radar safety detection system |
| CN114207312A (en) * | 2019-07-15 | 2022-03-18 | 火石工业产品有限责任公司 | Gas spring sensor using millimeter wavelength radar, and gas spring assembly and suspension system including the same |
-
2001
- 2001-03-09 CN CN 01211040 patent/CN2468062Y/en not_active Expired - Fee Related
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100366457C (en) * | 2003-05-29 | 2008-02-06 | 现代自动车株式会社 | Apparatus for controlling distance between vehicles |
| CN101793964A (en) * | 2010-03-09 | 2010-08-04 | 浙江大学 | 60GHz millimeter-wave automotive anti-collision radar device with digitized temperature compensation |
| CN102947725A (en) * | 2010-06-17 | 2013-02-27 | 三菱电机株式会社 | Radar device |
| CN102947725B (en) * | 2010-06-17 | 2015-01-21 | 三菱电机株式会社 | Radar device |
| CN104094134B (en) * | 2012-01-19 | 2017-06-06 | 罗伯特·博世有限公司 | For determining the position of at least one of surrounding environment of vehicle object and/or the method for motion and surrounding environment testing equipment by the acoustic signal reflected on object |
| CN104094134A (en) * | 2012-01-19 | 2014-10-08 | 罗伯特·博世有限公司 | Method and environment detection device for determining the position and/or the movement of at least one object in the environment of vehicle by means of acoustic signals reflected by the object |
| CN102897156A (en) * | 2012-10-22 | 2013-01-30 | 安徽省鸿运机械制造有限公司 | Intelligent slowing system for vehicle |
| CN103207395A (en) * | 2013-03-26 | 2013-07-17 | 南京理工大学 | Driving anti-collision radar device for automobile |
| CN104656079A (en) * | 2013-11-21 | 2015-05-27 | 中国科学院沈阳自动化研究所 | Long-distance radar collision detection device and method |
| CN104656079B (en) * | 2013-11-21 | 2017-02-08 | 中国科学院沈阳自动化研究所 | Long-distance radar collision detection device and method |
| CN105527303A (en) * | 2015-12-04 | 2016-04-27 | 深圳大学 | Method and system for detecting material by using millimeter waves |
| CN105527303B (en) * | 2015-12-04 | 2018-05-08 | 深圳大学 | Utilize the method and system of millimeter wave detection material |
| CN106799992A (en) * | 2017-03-14 | 2017-06-06 | 南宁市高光信息技术有限公司 | A kind of automobile stabilization system based on LFMCW millimeter waves |
| CN114207312A (en) * | 2019-07-15 | 2022-03-18 | 火石工业产品有限责任公司 | Gas spring sensor using millimeter wavelength radar, and gas spring assembly and suspension system including the same |
| CN114207312B (en) * | 2019-07-15 | 2023-10-31 | 火石工业产品有限责任公司 | Gas spring assembly, suspension system and displacement and velocity sensor |
| CN110907935A (en) * | 2019-12-05 | 2020-03-24 | 西安戴森电子技术有限公司 | Vehicle-mounted radar safety detection system |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |