Radar sensor based automobile collision avoidance method and device

Abstract

An embodiment of the invention provides a radar sensor based automobile collision avoidance method and device. The method mainly includes: transmitting a modulating signal to the outside via an electromagnetic wave mode by a radar sensor, and receiving an echo signal returned by an obstacle outside an automobile; computing distance between the obstacle and the automobile according to the modulating signal and the echo signal; comparing the distance between the obstacle and the automobile with preset deceleration distance and braking distance, and controlling the automobile to decelerate or brake according to a comparative result. The purpose of automotive active collision avoidance is achieved by means of millimeter-wave radar ranging. A millimeter wave radar has stable detection performance and good environmental suitability, is small in interference of rain, snow, fog and sunshine, can adapt to all kinds of weather, can measure parameters such as relative speed and azimuth of a target object, and is simple in structure, high in resolution and small in antenna component size under same measurement conditions.

Description

technical field [0001] The invention relates to the technical field of automobile collision avoidance, in particular to a radar sensor-based automobile collision avoidance method and device. Background technique [0002] The birth of automobiles has brought various conveniences to human life, and at the same time, car accidents have also brought many shadows to human beings. In order to make full use of the convenience that cars bring to human beings, and at the same time avoid the tragedy caused by car accidents as much as possible, many countries in the world are developing smart cars and smart road transportation systems to increase the safety performance of car transportation. [0003] According to the statistical analysis of highway traffic accidents in relevant materials, it is found that among the three links of drivers, cars and roads, the driver is the link with the worst reliability, and more than 80% of the accidents are caused by the driver's untimely response or...

AI Technical Summary

Problems solved by technology

Since 1971, active automobile anti-collision systems have been thought of in various ways such as ultrasonic, laser, infrared, microwave, etc., but the above systems have some shortcomings, and they have not been widely used in automobiles.

With the rapid development of highway networks in various countries, vicious traffic accidents continue to increase. In order to reduce accidents, protective measures such as driving seat belts and airbags have been adopted successively. When the seat belt brakes suddenly, it can prevent passengers from hitting the car glass due to inertia. Or fly out of the car; the airbag can be automatically inflated when the car encounters a severe impact to avoid direct collision between the passengers in the car and the machine, but the airbag cannot automatically adjust the expansion degree of the airbag according to the speed of the vehicle and the collision time. Said that airbags and seat belts are passive to prevent passengers from being injured. These technologies are passive protection and cannot actively prevent collisions

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