An emergency warning device for motor vehicles under low visibility conditions and its control method

Abstract

The invention provides a motor vehicle emergency circumstance reminding device under the low visibility condition and a control method of the motor vehicle emergency circumstance reminding device. When emergency circumstances happen to a motor vehicle, roof lights are turned on, and the vertical irradiation of the roof light is still ensured when a vehicle body rolls over and even completely overturns. The motor vehicle emergency circumstance reminding device comprises a running acceleration sensor in the vehicle body, a tilt angle sensor in the vehicle body and roof light modules. The running acceleration sensor is used for judging the running state of the motor vehicle and lightening the roof lights under the emergency circumstances. The tilt angle sensor is used for judging the tilt state of the vehicle body. The roof light modules are arranged around the vehicle body, and when the irradiation direction deflects, the normal irradiation angle is obtained through adjustment of a stepping motor. Under the low visibility condition (such rainy days, haze days and snow days), when the emergency circumstances happen, the device can achieve the quite good reminding function, is suitable for various motor vehicles, and guarantees running safety.

Description

Technical field [0001] The invention relates to a motor vehicle emergency prompting device and a control method thereof, in particular to a motor vehicle emergency prompting device and a control method thereof under low visibility conditions. Background technique [0002] When the visibility is low (smoggy, rainy, foggy, night), rear-end collisions on expressways and expressways frequently occur. The root cause is that when the downstream car brakes, only the car next to it can see the brake lights, and then pass to If the upstream vehicle is too fast or the safety distance is not enough, it is easy to brake not in time and cause a rear-end collision. In addition, when an accident occurs on an expressway, it is likely to be accompanied by a second accident, and the reason is that the brake information is too slow. [0003] In order to solve the problem of slow transmission of brake information, the present invention uses a bright red laser light beam (hereinafter referred to as sk...

AI Technical Summary

Problems solved by technology

[0002] When the visibility is low (smog, rain, fog, night), rear-end accidents on expressways and expressways occur frequently. The fundamental reason is that when the downstream car brakes, only the adjacent car can see the brake light, and then pass it to If the speed of the upstream vehicle is too fast or the safety distance is not enough, it is easy to brake in time and cause a rear-end collision accident

In addition, when an accident occurs on the expressway, it is likely to be accompanied by the occurrence of a secondary accident. The reason is that the brake information is transmitted too slowly.

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