: 2007-05-10 19:36:17
Description: Ultrasonic Ranging in social life have been widely used as vehicles for reversing radar. This paper studies a microprocessor-based SCM ultrasonic range finder. The equipment to the air ultrasonic propagation velocity to determine conditions, the use of reflective ultrasonic distance measurement analyte. This paper describes the equipment developed by the theoretical basis on the specific hardware and software design and the relevant circumstances.