Development of Ultrasonic Ranging System Based on STM32

Abstract

In this paper, the principle and method of ultrasonic distance measurement are described. It uses STM32 as MCU, has programmed software, uses STM32’s input and output pin to realize receiving and transmitting control of ultrasonic. As the distance is measured, the software filtering algorithm is used to remove the interference, which makes the measurement more accurate. The experimental results show that the ranging system can measure the distance accurately, and the measuring range can reach 2cm-400cm. It has some practical value.