CN104658318A - Forward anti-collision prewarning method based on infrared sensor - Google Patents
Forward anti-collision prewarning method based on infrared sensor Download PDFInfo
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- CN104658318A CN104658318A CN201510059972.2A CN201510059972A CN104658318A CN 104658318 A CN104658318 A CN 104658318A CN 201510059972 A CN201510059972 A CN 201510059972A CN 104658318 A CN104658318 A CN 104658318A
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- infrared sensor
- distance
- vehicle
- collision
- forward direction
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/16—Anti-collision systems
- G08G1/166—Anti-collision systems for active traffic, e.g. moving vehicles, pedestrians, bikes
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- General Physics & Mathematics (AREA)
- Traffic Control Systems (AREA)
Abstract
The invention provides a forward anti-collision prewarning method based on an infrared sensor. The forward anti-collision prewarning method comprises the following steps: S1, measuring the distance D from a vehicle to a front vehicle through the infrared sensor; S2, reading the speed and the acceleration of the vehicle from a CAN bus; S3, according to safety distance formulae, calculating a safety distance, wherein the safety distance formulae are as follows: Dw=V<2>/2(a-f)+V*(T+s) and Dbr= V<2>/2(a-f)+V*Ts, in which Dw is an alarm distance, Dbr is an automatic braking distance, V is the speed of the vehicle, a is the acceleration of the vehicle, f is an acceleration modification value, T is the braking time, Ts is the automatic braking response time and s is a braking time modification value; as further improvement, S4, according to the safety distance calculated in the step 3, judging and doing corresponding actions. The forward anti-collision prewarning method has the benefits as follows: according to different prewarning levels, a vehicle owner is warned or the actions are performed on the vehicle or the like, so that the effect of preventing collision is achieved, rear-end collision accidents are effectively reduced and traffic accidents are reduced.
Description
Technical field
The present invention relates to forward direction anticollision method for early warning, particularly relate to a kind of forward direction anticollision method for early warning based on infrared sensor.
Background technology
Along with the development of car industry, traffic hazard also gets more and more.Therefore, how better reducing traffic hazard is problem demanding prompt solution.
Summary of the invention
In order to solve the problems of the prior art, the invention provides a kind of forward direction anticollision method for early warning based on infrared sensor reducing rear-end collision.
The invention provides a kind of forward direction anticollision method for early warning based on infrared sensor, comprise the following steps:
S1, measured the distance D of this spacing front vehicles by infrared sensor;
S2, read this vehicle speed, acceleration from CAN line;
S3, according to safe distance formulae discovery safe distance, safe distance formula is:
D
w= V
2/2(a-f) + V*(T+s)；
D
br= V
2/2(a-f) + V*T
s；
Wherein, D
wfor alarm distance; D
brfor self-actuating brake distance; V is this vehicle speed; A is this car acceleration; F is acceleration correction value; T is braking time; Ts is the self-stopping reaction time; S is braking time modified value;
As a further improvement on the present invention, S4, to judge according to the safe distance formula calculated in step S3, make corresponding action.
Step S4 comprises following sub-step:
If A is D
w" D: the risk not having to collide is described, automobile is in safe condition;
If B is D
w>D>D
br: certain risk of collision is described but is not very serious, warning system sends Amber alert;
If C is D<D
br: very large risk of collision is described, warning system sends warning red, and carries out brake.
As a further improvement on the present invention, in steps A, pilot lamp display is green.
As a further improvement on the present invention, in step B, pilot lamp display is yellow.
As a further improvement on the present invention, in step C, pilot lamp display is red.
The invention has the beneficial effects as follows: by correlation parameters such as the distance speed of other vehicles and this car in infrared sensor measurement road, the related datas such as the Velocity-acceleration of this car are obtained by CAN, then according to the strategy formulated, calculate advanced warning grade, to warn to car owner according to different advanced warning grades or action etc. is implemented to automobile, thus play the effect of anticollision, effectively reduce rear-end collision, decrease traffic hazard.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of a kind of forward direction anticollision method for early warning based on infrared sensor of the present invention;
Fig. 2 is three grades of schematic diagram of warning of a kind of forward direction anticollision method for early warning based on infrared sensor of the present invention.
Embodiment
Illustrate below in conjunction with accompanying drawing and embodiment the present invention is further described.
Along with the development of car industry, traffic hazard also gets more and more.Vehicle collision avoidance system as one of active vehicle security system is subject to the great attention of domestic and international automotive research personnel, also achieves a lot of achievement.Collision avoidance system is mainly used in several aspects such as rear-end impact system, the anti-system in side, radar for backing car.The invention provides a kind of prediction policy of the forward direction anticollision based on infrared sensor, reduce the generation of rear-end collision.
As shown in Figure 1 to Figure 2, a kind of forward direction anticollision method for early warning based on infrared sensor, comprises the following steps:
S1, measured the distance D of this spacing front vehicles by infrared sensor;
S2, read this vehicle speed, acceleration from CAN line;
S3, according to safe distance formulae discovery safe distance, safe distance formula is:
D
w= V
2/2(a-f) + V*(T+s)；
D
br= V
2/2(a-f) + V*T
s；
Wherein, D
wfor alarm distance; D
brfor self-actuating brake distance; V is this vehicle speed; A is this car acceleration; F is acceleration correction value; T is braking time; Ts is the self-stopping reaction time; S is braking time modified value;
S4, to judge according to the safe distance formula calculated in step S3, make corresponding action.
As shown in Figure 1 to Figure 2, step S4 comprises following sub-step:
If A is D
w" D: the risk not having to collide is described, automobile is in safe condition;
If B is D
w>D>D
br: certain risk of collision is described but is not very serious, warning system sends Amber alert;
If C is D<D
br: very large risk of collision is described, warning system sends warning red, and carries out brake.
As shown in Figure 1 to Figure 2, in steps A, pilot lamp display is green.
As shown in Figure 1 to Figure 2, in step B, pilot lamp display is yellow.
As shown in Figure 1 to Figure 2, in step C, pilot lamp display is red.
In above-mentioned parameter, there are some to be formulate when dispatching from the factory according to the situation of vehicle, have some to be obtained by Real-Time Monitoring, having some to be want car owner to arrange voluntarily.Braking time modified value S is arranged by the knob that automobile is special by car owner, and arrange according to the brake reaction velocity for car owner, reaction velocity can be set to lower value soon, and the Calculation of Safety Distance value of relative front truck is now nearer; What reaction velocity was slow can be set to high value, and the Calculation of Safety Distance value of relative front truck is now far away.
Distance between front vehicles and this car, is calculated by infrared sensor, and with the vehicle nearest apart from this car for reference substance.
Brake acceleration is wherein the brake acceleration of normal braking situation on standard road surface obtained according to the test of vehicle before dispatching from the factory, and is a measured value.
Its mode of warning is pilot lamp prompting, if normally, display is green; If there is slight risk of collision, display is yellow; If there is larger risk of collision, display is red.
A kind of forward direction anticollision method for early warning based on infrared sensor provided by the invention, relative classic method, for safe distance calculating, add the concept of modified value.Wherein acceleration correction value, is estimated by the operation real-time status of vehicle and acceleration mode, can more accurately be reflected the situations such as real-time road surface friction force.Braking time modified value determines according to the different driving styles of car owner, and car owner is by the operation knob sets itself of native system, and the driver of cautious style can arrange braking time length a bit, can make warning like this when leading vehicle distance is far away; It is shorter that the driver of courageous and resolute type can arrange braking time, can make like this warning when leading vehicle distance is nearer.
Above content is in conjunction with concrete preferred implementation further description made for the present invention, can not assert that specific embodiment of the invention is confined to these explanations.For general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, some simple deduction or replace can also be made, all should be considered as belonging to protection scope of the present invention.
Claims (5)
1., based on a forward direction anticollision method for early warning for infrared sensor, it is characterized in that, comprise the following steps:
S1, measured the distance D of this spacing front vehicles by infrared sensor;
S2, read this vehicle speed, acceleration from CAN line;
S3, according to safe distance formulae discovery safe distance, safe distance formula is:
D
w = V
2/2(a-f) + V*(T+s)；
D
br = V
2/2(a-f) + V*T
s；
Wherein, D
wfor alarm distance; D
brfor self-actuating brake distance; V is this vehicle speed; A is this car acceleration; F is acceleration correction value; T is braking time; Ts is the self-stopping reaction time; S is braking time modified value;
S4, to judge according to the safe distance formula calculated in step S3, make corresponding action.
2. the forward direction anticollision method for early warning based on infrared sensor according to claim 1, it is characterized in that, step S4 comprises following sub-step:
If A is D
w" D: the risk not having to collide is described, automobile is in safe condition;
If B is D
w>D>D
br: certain risk of collision is described but is not very serious, warning system sends Amber alert;
If C is D<D
br: very large risk of collision is described, warning system sends warning red, and carries out brake.
3. the forward direction anticollision method for early warning based on infrared sensor according to claim 2, is characterized in that: in steps A, and pilot lamp display is green.
4. the forward direction anticollision method for early warning based on infrared sensor according to claim 2, is characterized in that: in step B, and pilot lamp display is yellow.
5. the forward direction anticollision method for early warning based on infrared sensor according to claim 2, is characterized in that: in step C, and pilot lamp display is red.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510059972.2A CN104658318A (en) | 2015-02-04 | 2015-02-04 | Forward anti-collision prewarning method based on infrared sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510059972.2A CN104658318A (en) | 2015-02-04 | 2015-02-04 | Forward anti-collision prewarning method based on infrared sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104658318A true CN104658318A (en) | 2015-05-27 |
Family
ID=53249378
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510059972.2A Pending CN104658318A (en) | 2015-02-04 | 2015-02-04 | Forward anti-collision prewarning method based on infrared sensor |
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| Country | Link |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106846547A (en) * | 2017-01-18 | 2017-06-13 | 成都锐奕信息技术有限公司 | A kind of drive recorder of detecting distance and intelligent alarm |
| CN108205144A (en) * | 2018-03-28 | 2018-06-26 | 李强 | A kind of road work vehicle collision prewarning device, road work vehicle and anti-collision warning method |
| CN109144059A (en) * | 2018-08-21 | 2019-01-04 | 王志 | A kind of navigation system with intelligent early-warning rescue function |
| CN114274183A (en) * | 2021-11-22 | 2022-04-05 | 深圳优地科技有限公司 | Brake performance test system and method and test controller |
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| CN1166426A (en) * | 1997-04-08 | 1997-12-03 | 张国栋 | Automatic collisionproof method for motor vehicles and its embodiment |
| US5952939A (en) * | 1994-09-27 | 1999-09-14 | Nissan Diesel Co., Ltd. | Vehicle collision prevention device |
| JP2005238992A (en) * | 2004-02-26 | 2005-09-08 | Hitachi Ltd | Vehicular control device |
| CN103465886A (en) * | 2013-09-18 | 2013-12-25 | 毛振刚 | Intelligent protection safety device for reducing casualty risks caused by automobile collision |
| CN104299450A (en) * | 2014-10-23 | 2015-01-21 | 西安电子科技大学 | Vehicle collision early warning method based on analytic hierarchy process and grey fuzziness |
-
2015
- 2015-02-04 CN CN201510059972.2A patent/CN104658318A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5952939A (en) * | 1994-09-27 | 1999-09-14 | Nissan Diesel Co., Ltd. | Vehicle collision prevention device |
| CN1166426A (en) * | 1997-04-08 | 1997-12-03 | 张国栋 | Automatic collisionproof method for motor vehicles and its embodiment |
| JP2005238992A (en) * | 2004-02-26 | 2005-09-08 | Hitachi Ltd | Vehicular control device |
| CN103465886A (en) * | 2013-09-18 | 2013-12-25 | 毛振刚 | Intelligent protection safety device for reducing casualty risks caused by automobile collision |
| CN104299450A (en) * | 2014-10-23 | 2015-01-21 | 西安电子科技大学 | Vehicle collision early warning method based on analytic hierarchy process and grey fuzziness |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106846547A (en) * | 2017-01-18 | 2017-06-13 | 成都锐奕信息技术有限公司 | A kind of drive recorder of detecting distance and intelligent alarm |
| CN108205144A (en) * | 2018-03-28 | 2018-06-26 | 李强 | A kind of road work vehicle collision prewarning device, road work vehicle and anti-collision warning method |
| CN109144059A (en) * | 2018-08-21 | 2019-01-04 | 王志 | A kind of navigation system with intelligent early-warning rescue function |
| CN114274183A (en) * | 2021-11-22 | 2022-04-05 | 深圳优地科技有限公司 | Brake performance test system and method and test controller |
| CN114274183B (en) * | 2021-11-22 | 2024-01-30 | 深圳优地科技有限公司 | Brake performance test system, method and test controller |
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Application publication date: 20150527 |