CN202115498U - Automobile distance keeping system for automobile safety driving - Google Patents
Automobile distance keeping system for automobile safety driving Download PDFInfo
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- CN202115498U CN202115498U CN2011201662171U CN201120166217U CN202115498U CN 202115498 U CN202115498 U CN 202115498U CN 2011201662171 U CN2011201662171 U CN 2011201662171U CN 201120166217 U CN201120166217 U CN 201120166217U CN 202115498 U CN202115498 U CN 202115498U
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Abstract
The utility model discloses an automobile distance keeping system for automobile safety driving, which is far in forward-direction measuring distance, relatively accurate in target tracking and low in misinformation rate. The automobile distance keeping system comprises an active safety radar, a vehicle speed sensor and a data processor, wherein the active safety radar and the vehicle speed sensor are both connected with the data processor which is connected with an electronic braking unit. The data processor is provided with a communication interface connected with an engine electronic control unit (ECU). The automobile distance keeping system can be widely applied to various motor vehicles.
Description
Technical field
The utility model relates to a kind of automobile auxiliary device, relates in particular to a kind of safety traffic spacing that is used for automobile and keeps system.
Background technology
In daily driving process, rear-end collision appears causing because of spacing is too short often.Therefore, keep suitable spacing according to the speed of a motor vehicle in going, reserve enough braking distances and be and prevent the key that knocks into the back.There are problems such as the distance survey active distance is short, braking distance is provided with inadequately rationally, rate of false alarm height in the prior art; As open day being that on 03 30th, 2011, publication number are that the patent documentation of 101992729A adopts infrared distance measuring sensor, controller and alarm module; The infrared distance measuring sensor is separately positioned on the both sides of car body front-end and back-end; And be connected with controller through wireless signal, make people understand the situation of forward direction vehicle distances or obstacle on the run.The shortcoming of this scheme is that the infrared pickoff measuring distance is short, and is affected by environment big, therefore makes the ranging system reliability not high, and not anti-wrong report measure; In addition, during scheme does not provide and goes which type of car from being dangerous, little to the caution and the reference role of navigating mate; And for example open day be that on 06 24th, 2009, publication number are that 101462515 patented technology is employed in above the front windshield and is provided with width indicator according to car body size and perspective principle and measures the forward direction vehicle distances, help the driver certifying spacing.Though this scheme is simple in structure, because chaufeur will aim at width indicator and front vehicles, seriously disperse the attention of chaufeur, bring out accident easily, particularly complicated, especially true when running at high speed in road conditions.
Summary of the invention
The utility model main purpose is to provide a kind of forward direction far measuring distance, a kind of vehicle safety travel spacing that the relatively accurate rate of false alarm of tracking target is lower to keep system; It can self-measuring forward direction vehicle distances, and through the control engine speed, the speed of a motor vehicle keeps and the distance of front truck.
The utility model mainly is able to solve through following technical proposals to the prior art problem, comprises the active safety radar, car speed sensor; Data handler; The active safety radar connects data handler, and car speed sensor connects data handler, and data handler connects the electric brake unit; Data handler is provided with communication interface, and communication interface connects Engine ECU.In the scheme; The active safety radar is different from the short range radar of reversing usefulness; It can be measured larger distance, and can follow the tracks of forward direction vehicle, minimizing more accurately owing to influences such as vehicle doubling in road driving, the static divider that moves line, turning, uphill/downhill and road both sides, sign boards, and data handler carries out judging to safety distance according to the GES of car speed sensor, the measuring distance of active safety radar; With the forward direction vehicle distances time less than safety distance; Data handler notice Engine ECU reduces engine speed, and controls the electric brake unit simultaneously and reduce the speed of a motor vehicle, and spacing is remained at safety distance.
As preferably, also comprise camera, camera connects data handler.For reducing rate of false alarm, use vision technique and Radar Technology to carry out information fusion, utilize redundancy and complementary characteristic between data to carry out fault-tolerant processing, overcome shortcomings such as low, the effective investigative range of single-sensor reliability is little.
As preferably, also comprise the switch of overtaking other vehicles, the switch of overtaking other vehicles connects data handler.When needs were overtaken other vehicles, the switch connection of will overtaking other vehicles, data handler did not carry out safety distance control, so that accomplish passing maneuver.
As preferably, the active safety radar is a laser radar, and laser radar connects data handler, and it is simple relatively that laser radar has structure, characteristics such as high monochromaticity, high directivity, the coherence is good, survey precision is higher, detection range is far away, low price.
As preferably, laser radar is the two-dimension scanning laser radar, and the two-dimension scanning laser radar connects data handler, realizes higher resolution capability under uphill/downhill, turning situation, reduces at vehicle uphill/downhill, the track rejection that causes when turning.
As preferably, the active safety radar is a microwave radar, and microwave radar connects data handler.The microwave radar detection range is far away, reliable, measurement performance receives the influence of external factors such as weather less.
As preferably, microwave radar is the phased array microwave radar.Beam scanning is more flexible, has excellent target identification performance, can reduce rate of false alarm effectively.
As preferably, communication interface is the CAN interface, and the CAN interface is through the total wire joint Engine ECU of CAN.The general purpose interface that uses ECU is that CAN interface realization data handler is communicated by letter with Engine ECU.
The beneficial effect that the utility model brings is; Carry out analysis and judgement according to current vehicle speed and with the distance of front truck, through control engine speed, the speed of a motor vehicle keeps and the distance of front truck, has increased traveling security effectively; Carry out information fusion through range only radar type selecting, increase camera in addition; Utilize the redundancy and the complementarity of information to carry out fault-tolerant processing, reduced rate of false alarm, make system have more ease of use, reliability and practicality.
Description of drawings
Fig. 1 is a kind of functional block diagram that the utility model adopts laser radar;
Fig. 2 is a kind of functional block diagram that the utility model adopts microwave radar.
Among the figure: the 1st, data handler, the 2nd, two-dimension scanning laser radar, the 3rd, electric brake unit, the 4th, camera, the 5th, car speed sensor, the 6th, the switch of overtaking other vehicles, the 7th, CAN interface, the 8th, Engine ECU, the 9th, CAN bus, the 10th, phased array millimeter wave radar.
The specific embodiment
Below through embodiment, and combine accompanying drawing, the technical scheme of the utility model is further specified.
Embodiment 1: as shown in Figure 1, a kind of vehicle safety travel spacing keeps system, comprises two-dimension scanning laser radar 2, car speed sensor 5, data handler 1, camera 4, the switch 6 of overtaking other vehicles, CAN interface 7, electric brake unit 3; Data handler 1 connects two-dimension scanning laser radar 2, receives the trace data to target; Car speed sensor 5 connects the analog quantity input end of data handler 1; Camera 4 connects the video inputs of data handler 1; The switch 6 of overtaking other vehicles connects the switching value input end of data handler 1; The chipset of CAN interface 7 is arranged on the data handler 1, and the mouth of data handler 1 connects electric brake unit 3, and CAN interface 7 is connected to be realized on the CAN bus 9 communicating by letter with Engine ECU 8.
In data handler 1, the information data of two-dimension scanning laser radar 2, the vision data of camera 4 are merged; Utilize redundancy and complementary characteristic between information data to carry out fault-tolerant processing; Raising to turn, the resolution capability of resolution capability under the uphill/downhill situation and road sign, vehicle, traffic sign, lane mark, screen out the valid data of forward direction spacing.
Safety distance in the judgement, present embodiment adopts external " 4 seconds spacing methods " commonly used,
Promptly the setup time in 1 second adds the brake time in 3 seconds, multiply by 4 with second speed and be safe distance between vehicles, be 100Km/ hour such as speed per hour, then safe distance between vehicles is 110 meters, speed per hour be 50Km/hour, safe distance between vehicles is 55 meters, by that analogy.Data handler 1 is gathered the GES of car speed sensor 5; Computationally secure spacing as stated above; And compare with the vehicle distance data that screens out, when measuring spacing less than safe distance between vehicles, data handler 1 reduces engine speeds through CAN interface 7, CAN bus 9 notice Engine ECU 8; Data handler 1 reduces the speed of a motor vehicle through unit 3 brakes of output port control electric brake simultaneously, makes the distance of Ben Che and the place ahead car remain on safety distance.
When overtaking other vehicles, connect the switch 6 notification data treaters 1 of overtaking other vehicles and change the state of a control of overtaking other vehicles over to, after completion is overtaken other vehicles, break off the switch 6 of overtaking other vehicles, data handler 1 returns to the safe distance between vehicles state of a control.
Embodiment 2: as shown in Figure 2, the range finding of forward direction car adopts phased array millimeter wave radar 10 and camera 4 to carry out the number of targets fault-tolerant processing, realizes more excellent target identification performance.Control process is identical with embodiment 1.
So the utlity model has far measuring distance, characteristic such as that rate of false alarm is low, braking distance is provided with is reasonable, easy to use, dependable performance.
Claims (8)
1. a vehicle safety travel spacing keeps system, it is characterized in that: comprise the active safety radar, car speed sensor; Data handler; Said active safety radar connects data handler, and car speed sensor connects data handler, and data handler connects the electric brake unit; Data handler is provided with communication interface, and said communication interface connects Engine ECU.
2. keep system according to the said a kind of vehicle safety travel spacing of claim 1, it is characterized in that: also comprise camera, said camera connects data handler.
3. keep system according to the said a kind of vehicle safety travel spacing of claim 1, it is characterized in that: also comprise the switch of overtaking other vehicles, the said switch of overtaking other vehicles connects data handler.
4. keep system according to the said a kind of vehicle safety travel spacing of claim 1, it is characterized in that: said active safety radar is a laser radar.
5. keep system according to the said a kind of vehicle safety travel spacing of claim 4, it is characterized in that: said laser radar is the two-dimension scanning laser radar.
6. keep system according to the said a kind of vehicle safety travel spacing of claim 1, it is characterized in that: said active safety radar is a microwave radar.
7. keep system according to the said a kind of vehicle safety travel spacing of claim 6, it is characterized in that: said microwave radar is the phased array microwave radar.
8. keep system according to the said a kind of vehicle safety travel spacing of claim 1, it is characterized in that: said communication interface is the CAN interface, and said CAN interface is through the total wire joint Engine ECU of CAN.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201662171U CN202115498U (en) | 2011-05-24 | 2011-05-24 | Automobile distance keeping system for automobile safety driving |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201662171U CN202115498U (en) | 2011-05-24 | 2011-05-24 | Automobile distance keeping system for automobile safety driving |
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| Publication Number | Publication Date |
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| CN202115498U true CN202115498U (en) | 2012-01-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011201662171U Expired - Fee Related CN202115498U (en) | 2011-05-24 | 2011-05-24 | Automobile distance keeping system for automobile safety driving |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102927964A (en) * | 2012-10-24 | 2013-02-13 | 安科智慧城市技术（中国）有限公司 | Distance measuring device and method and vehicle |
| CN103587467A (en) * | 2013-11-21 | 2014-02-19 | 中国科学院合肥物质科学研究院 | Dangerous-overtaking early-warning prompting method and system |
| CN104442756A (en) * | 2013-09-17 | 2015-03-25 | 泰乐玛汽车制动***（上海）有限公司 | Automatic warning system and method for vehicles |
| CN104554079A (en) * | 2013-10-14 | 2015-04-29 | 通用汽车环球科技运作有限责任公司 | Measurement association in vehicles |
-
2011
- 2011-05-24 CN CN2011201662171U patent/CN202115498U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102927964A (en) * | 2012-10-24 | 2013-02-13 | 安科智慧城市技术（中国）有限公司 | Distance measuring device and method and vehicle |
| CN102927964B (en) * | 2012-10-24 | 2016-02-03 | 安科智慧城市技术（中国）有限公司 | Distance-measuring device, method and vehicle |
| CN104442756A (en) * | 2013-09-17 | 2015-03-25 | 泰乐玛汽车制动***（上海）有限公司 | Automatic warning system and method for vehicles |
| CN104554079A (en) * | 2013-10-14 | 2015-04-29 | 通用汽车环球科技运作有限责任公司 | Measurement association in vehicles |
| CN103587467A (en) * | 2013-11-21 | 2014-02-19 | 中国科学院合肥物质科学研究院 | Dangerous-overtaking early-warning prompting method and system |
| CN103587467B (en) * | 2013-11-21 | 2015-11-18 | 中国科学院合肥物质科学研究院 | A kind of danger is overtaken other vehicles early warning and reminding method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120118 Termination date: 20140524 |