基于嵌入式系统STM32的超声波介质传输速度测试系统的设计

Design of Ultrasonic Medium Transmission Speed Test System Based on STM32

摘要:

本测试系统由微控制器(STM32F103ZET6)、测温系统、超声波发射电路、超声波接收电路、显示系统等部分组成。先产生40KHZ的方波信号,再通过信号调整电路送到超声波发射探头。再通过对超声波接收探头采集到的回波信号进行整形并送入MCU控制器进行处理得到所需数据,并通过显示模块显示。通过温度传感器采集环境温度,并通过STM32F103ZET6控制器对采集温度传感器的信号进行处理分析,得到环境温度,并通过显示模块显示。并在不同温度下,实现了超声波在空气和水中传播速度的测量。

Abstract:

The test system consists of a microcontroller (STM32F103ZET6), a temperature measurement system, an ultrasonic transmission circuit, an ultrasonic receiving circuit, and a display system. First,the square wave signal of 40KHZ is generated by STM32F103ZET6, and then it is sent to the ultrasonic transmitting probe through the signal adjusting circuit. Then, the echo signal which is collected by the ultrasonic receiving probe is shaped and sent to the MCU controller for processing to obtain the required data, and is displayed through the display module. The ambient temperature is collected by a temperature sensor, and the signal of the collected temperature sensor is processed and analyzed by the STM32F103ZET6 controller to obtain an ambient temperature, which is displayed by the display module. And at different temperatures, the measurement of the propagation speed of ultrasonic waves in air and water is achieved.