RESEARCH AND DESIGN OF ULTRASONIC RANGE FINDER BASED ON AT89S52 SINGLE-CHIP
ABSTRACT
At first, this paper introduces the principle of distance-measuring-device which is designed with the single chip processor of 51series. This principle is based on the ultrasonic measure which is calculated by the time used by ultrasonic traveling from the target .Then this paper expatiates the working principle of all the parts of the circuit. The system with a ultrasonic sensor realize no contacted, air distance, measurement and it considers fully of the effect which is caused by the different speed with the different temperature. And mainly discusses that there is the propagating speed of the ultrasonic wave varying with temperature, and that there are some other interference signals influencing the distance-measurement in the measurement. Here, put forward the solutions for the problems. It describes the hardware design of the system in detail, and provides the procedural flow chart of software design .The test results demonstrate the validity of all the methods proposed in this dissertation, and the test show that this intelligent ultrasonic meter has high accuracy. The ultrasonic range finder is of high integration ,high2speed reaction ,high measure precision ,and high rate of performance and price.
