Automatic protection system for vehicle anticollision

Abstract

The invention provides an automatic protection system for vehicle anticollision. The system can carry out prewarning promotion when a vehicle is in a dangerous condition and can adopt emergent protection measures to effectively reduce the probability of occurrence of traffic accidents and ensure the safety of the vehicle and people in the vehicle. The system comprises a laser rangefinder, a high-speed A/D converter, a DSP control singlechip, a sunplus singlechip, a sound and light warning unit, an LED display module and a brake control unit; information of distance between a front vehicle and the own vehicle is measured by the laser rangefinder and sent to the DSP control singlechip by the high-speed A/D converter; the DSP control singlechip compares measured data and prestored safety distance; if the measured data exceeds the safety distance, the DSP control singlechip outputs a signal to the sunplus singlechip; the sunplus singlechip controls the sound and light warning unit to send a warning signal; when the DSP control singlechip monitors that the distance between two vehicles is close to a collision critical value, a command is sent to start the brake control unit for braking; and the LED display module displays relevant data.

Description

Technical field: [0001] The invention relates to a vehicle safety device, in particular to an automobile active collision avoidance system based on the combination of DSP technology and laser ranging technology, which is used to ensure the safety of members in the vehicle and the vehicle itself. Background technique: [0002] At present, automobile anti-collision technology is divided into passive and active anti-collision two kinds. Strengthen the structure of the car (such as putting safety frames on the front and rear of the car), install driving seat belts and airbags, etc. These are all passive anti-collision devices for cars, and they can only reduce the occurrence of collision accidents to a certain extent The loss of time cannot fundamentally avoid the occurrence of traffic accidents. Therefore, since 1971, people have been very active in the research of automobile active collision avoidance technology, and then a special field of research on active automobile colli...

AI Technical Summary

Problems solved by technology

[0005] 1) Due to the problem of frequency band and sensitivity, the radar speed measurement effect of some cheap equipment is not good, and the relatively good effect costs a lot of money, so it cannot be widely used

[0006] 2) Radar speed measurement has poor interference performance

[0007] 3) The radar speed measurement is proportional to the square of the distance and attenuates, so the farther the distance is, the less the ultrasonic wave will be reflected, and the sensitivity will drop rapidly, so that the radar ranging method is only suitable for shorter distances

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