Ultrasonic Distance Measurement Instrument Based on PIC Monolithic Machine

Comparing with the anti-jamming capacity of common ultrasonic telemeter system, this article introduces a real-time system of ultrasonic distance measurement instrument which was controlled by PIC16F876 SCM. The circuit adopts integrated COMS chip temperature compensation, which has better anti-jamming capacity .The frequency of the telemeter is up to about 20 Hz and the system can inspect the distance between the bodywork flank and the roadblock in real time, which can satisfy the requirment of real-time anti-crash of bodywork's.