Intelligent control device for automobile brake lamp

Abstract

The invention discloses an intelligent control device for an automobile brake lamp, which is used for preventing rear collision. The intelligent control device is characterized by comprising a central processor (1), an acceleration pedal displacement sensor (2) and a brake lamp control circuit (3), wherein the acceleration pedal displacement sensor (2) is used for acquiring an acceleration pedal displacement change signal (4) and transmitting the signal to the central processor (1); the central processor (1) is used for computing an acceleration pedal displacement change rate according to the acceleration pedal displacement change signal (4); positive and negative acceleration pedal displacement change rates represent treading of an acceleration pedal and loosening of the acceleration pedal respectively; and when the acceleration pedal displacement change rate reaches an acceleration pedal displacement change rate threshold value set in the central processor (1), i.e., the acceleration pedal releasing action of a driver is very quick, the central processor (1) considers that the driver is going to perform emergency braking and transmits a control signal (8) to the brake lamp control circuit (3), so that the brake lamp is lightened before the driver treads on a brake pedal.

Description

technical field [0001] The invention relates to the field of automobile active safety, and more particularly relates to an intelligent control device for brake lights of automobiles for preventing rear-end collisions of rear vehicles. Background technique [0002] At present, the traditional car brake light control device is to light the brake light after the driver steps on the brake pedal to warn the rear car that the front car is braking. The problem is that when the driver of the rear vehicle sees the front When the brake light of the vehicle is on, the driver of the vehicle in front has already applied the brakes, and the vehicle in front is already decelerating. The driver of the rear vehicle perceives the deceleration intention of the driver of the vehicle in front according to the lighted brake lights, and makes a deceleration decision. After depressing the brake pedal to perform the braking action, the speed of the vehicle behind begins to decrease. Because there i...

AI Technical Summary

Problems solved by technology

[0002] At present, the traditional car brake light control device is to light the brake light after the driver steps on the brake pedal to warn the rear car that the front car is braking. The problem is that when the driver of the rear vehicle sees the front When the brake light of the vehicle is on, the driver of the vehicle in front has already applied the brakes, and the vehicle in front is already in a deceleration state

This brake light control device uses the accelerator pedal switch to judge whether the driver has stepped on the accelerator pedal. If the driver has not stepped on the accelerator pedal, it is considered that the driver has the intention to brake, so that some or all of the brake light bulbs are turned on. but low brightness

However, it is unscientific for this device to simply judge the behavior of "the accelerator pedal is not pressed" as a braking intention, because in the actual driving process, it often happens that the driver does not continue to step on the accelerator pedal after releasing it. The condition of the brake pedal, that is, the driver does not intend to brake

Although the device adopts the method of lighting part of the brake lights, or lighting all of them but with low brightness to distinguish the status of the brake lights during real braking, this may still cause false alarms and false alarms, and requires other The driver relearns the knowledge of the brake light signal, otherwise other drivers will not be able to distinguish whether the vehicle in front is really braking, which will affect the driving safety of other drivers

In addition, there is a large difference in the rate of change of vehicle speed when the driver performs emergency braking and conventional braking, and it is often easy to cause a rear-end collision when the vehicle in front performs emergency braking, but the above-mentioned brake light control device cannot effectively identify emergency brake

Therefore, the above-mentioned brake light control device has functional limitations, cannot well reduce the possibility of rear-end collisions, and cannot really exert the effect of improving road traffic safety.

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