Car safety control method based on bidirectional speed measurement

A technology of automobile safety and control method, which is applied to control devices, vehicle components, input parameters of external conditions, etc., can solve problems such as affecting control efficiency, long distance of reminding brakes, etc., to avoid rear-end collision of vehicles.

Pending Publication Date: 2016-11-16

成都生辉电子科技有限公司

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AI-Extracted Technical Summary

Problems solved by technology

If the intelligent driving or unmanned driving mode is adopted, the control method will affect the control ef...

Abstract

The invention discloses a car safety control method based on bidirectional speed measurement. The method includes the following steps that (1) a front distance measuring unit and a rear distance measuring unit are arranged on a car, the front distance measuring unit is used for measuring the distance S between the car and a car located in front in the driving direction of the car, and the rear distance measuring unit is used for measuring the distance S4 between the car and a car located behind in the direction opposite to the driving direction of the car, and the distances are transmitted to a control unit; (2) a speed measuring unit is arranged on the car, the speed measuring unit is used for measuring the relative speed V2 between the car and the car located in front in the driving direction of the car, and the relative speed V4 between the car and the car located behind in the direction opposite to the driving direction of the car, and the relative speeds are transmitted to the control unit; and (3) the control unit receives the information, outputs brake signals and controls the car to brake. The method can be used for conducting safe car anti-collision control in a short distance and is particularly suitable for an intelligent driving mode or an unmanned driving mode.

Application Domain

Automatic initiationsExternal condition input parameters

Technology Topic

Speed measurementAutomobile safety +5

Examples

Experimental program(1)

Example Embodiment

[0016] The present invention will be further described in detail below in conjunction with examples, but the implementation of the present invention is not limited thereto.

[0017] The automobile collision avoidance control method of this embodiment is more suitable for intelligent driving mode or unmanned driving mode, and includes the following steps:

[0018] 1) The car is equipped with a front ranging unit and a rear ranging unit. The front ranging unit measures the distance S between the car and the front car in the direction of the car, and the rear ranging unit measures the distance between the car and the car in the opposite direction. The distance S4 between the cars behind and transported to the control unit;

[0019] 2) There is a speed measuring unit on the car. The speed measuring unit measures the relative speed V2 between the car and the front car in the direction of the car, and the relative speed V4 between the car and the rear car in the opposite direction of the car, and sends it to the control Unit: The speed measurement unit measures the speed of the car as V1, the speed of the car in the front of the car is V3, and the speed of the car behind the car in the opposite direction is V5, V2=V1-V3, V4=V5-V3, and the car The braking distance from speed V3 control to V1 is S2, the safety distance is S3, S1=S2+S3, S3

[0020] 3) The control unit receives the above information and sets the safety distance between the car and the front car as S1, and the safety distance between the car and the rear car as S5, such as V2>0, S≤S1, V4≤0, S4≥S5 When the time, the control unit outputs the braking signal and controls the car to brake.

[0021] Specifically, S2=0.10V2+V2*V2/130.

[0022] Reaction distance=V2×1000×2.5/3600.

[0023] In the automobile collision avoidance control method of this scheme, S3 is lower than the length of the existing reaction distance, which is sufficient for safe automobile collision avoidance control in a shorter distance.

[0024] As mentioned above, the present invention can be implemented well.

PUM

Description & Claims & Application Information

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