The ultrasonic back-up crashproof alarm (1)

Published:2011/7/22 22:36:00 Author:qqtang | Keyword: ultrasonic, crashproof alarm | From:SeekIC

Here is to introduce an ultrasonic back-up crashproof alarm which is installed in the tail of the car, it detects and alarms with the reflected ultrasonic of the obstacle behind the car, when it has detected the obstacle in the effective range, it will remind the drive.The working principle of the circuit The ultrasonic back-up crashproof alarm consists of the ultrasonic oscillator, ultrasonic emitter/receiver control circuit and acousto-optic alarm circuit, see as figure 7-107.



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