Automobile anti-collision alarm system based on pulse laser ranging

Abstract

The invention relates to an automobile anti-collision alarm system based on pulse laser ranging, which belongs to the technical field of electronics, which is provided with a control circuit, a laser transmitting circuit, a laser receiving amplifier circuit and relevant circuits. A single chip microcomputer STC12C5A60S2 is the core of the control circuit, after laser pulse signals are in spectral processing by a spectroscope with the support of corresponding programs, one channel of the laser pulse signals is reflected by a reflector to be directly received by a PIN receiving circuit, another channel of the pulse laser signals is reflected by an automobile ahead, and then is received by the APD (avalanche photo diode) laser receiving circuit, after receiving time of each of the channels of the laser pulse signals is accurately corrected by a discriminator circuit, the channels of the laser pulse signals are transmitted to the single chip microcomputer master control circuit to be processed, the distance from an automobile with the automobile anti-collision alarm system and the automobile ahead is monitored in real time, and the system can give a sound and light alarm when the automobile is in danger, simultaneously reminds a driver of controlling automobile speed in a voice manner and keeping the distance from the automobile to the automobile ahead. In addition, when necessary, the system outputs brake signals to control the automobile to brake. Besides, the automobile anti-collision alarm system is large in measurement range, high in directivity, interference resistance, precision and practicality, fast in response time and simple in structure, and has high economic benefit and social benefit.

Description

technical field [0001] The invention relates to an automobile anti-collision alarm system based on pulse laser ranging, which is suitable for being installed on various automobiles and belongs to the field of electronic technology. Background technique [0002] At present, the anti-collision means of automobiles mainly focus on vehicle frames and car bodies that can absorb as much impact energy as possible, more reasonable force-bearing safety airbags and seat belts, etc. These passive protection measures can protect the safety of the occupants in the car in the event of an accident, thereby reducing the number of fatalities in traffic accidents. However, the ultimate solution is to save more lives, more injuries and save more money. The first choice is to equip cars with anti-collision warning systems. The car anti-collision alarm system can be realized by the following technologies: 1) Ultrasonic wave, because the ultrasonic energy is attenuated in proportion to the s...

AI Technical Summary

Problems solved by technology

It is impossible for this sensor to determine the distance of the object very accurately, it is mainly used in the alarm system, such as detecting pedestrians in the lane, etc.

3) Video imaging, due to its high cost, also limits its use

4) Microwave, microwave is easily interfered by external electromagnetic waves

All of the above techniques have limitations

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