A Method and System Designed For Detecting the Thickness of Device by Using Half-Wave Full Transmission Principle

Abstract

In this paper, a method based on half-wave full transmission principle is introduced to detect the thickness of the device. Firstly, acoustic signal penetrating through the device can be converted into electrical signal by using acoustic sensor. Then the A/D conversion module of STM32 is used to convert the electrical signal into digital signal. After that, through serial port communication, the data information collected by STM32 is transmitted to the computer and the threshold value is set by Matlab software. If the collected data is higher than the threshold value, it is considered qualified, and if it is less than the threshold value, it is considered unqualified, so as to analyze whether the thickness of the device is qualified. The system can provide new ideas and methods for detecting whether the thickness of the device is qualified and also save time, improve efficiency and accuracy.