基于激光超声的复合板厚度检测实验平台研制  

Development of Experimental Platform for Thickness Inspection of Composite Plates Based on Laser Ultrasound

作　　者：李小占 毛星 徐冬 孙友昭 王晓晨 杨荃 LI Xiaozhan;MAO Xing;XU Dong;SUN Youzhao;WANG Xiaochen;YANG Quan(Institute of Engineering Technology,University of Science and Technology Beijing,Beijing 102206,China)

机构地区：[1]北京科技大学工程技术研究院,北京102206

出　　处：《实验室研究与探索》2025年第4期61-64,共4页Research and Exploration In Laboratory

基　　金：国家自然科学基金项目(51975043)。

摘　　要：激光超声检测因非接触式优势而成为无损检测领域的研究热点,适用于复合结构的检测。基于双波混合干涉原理,搭建了基于激光超声的复合板厚度检测实验平台,包括激发超声激励系统、激光超声探测系统、超声信号高速采集系统3个部分。基于所搭建实验平台,实现了铜铝复合板铜片厚度的检测,检测精度可达99%以上。结果表明,所搭建实验平台可实现复合板厚度非接触式检测。Laser ultrasonic detection method becomes a research hotspot in the field of non-destructive testing due to its non-contact advantages.It is applicable to the detection of composite structures based on the principle of two-wave mixing interference.The paper builds a laser ultrasonic based composite plate thickness detection experimental platform,which packages three parts,i.e.,excitation system to stimulate ultrasonic waves,based on the principle of two-wave mixing interference of the optical detection system,and highspeed signal acquisition and signal processing.Based on the constructed platform,the thickness of the copper sheet of copper-aluminum composite plate is detected,and the detection accuracy can reach more than 99%.The constructed experimental platform can achieve noncontact detection of composite thickness.

关 键 词：厚度检测 激光超声 无损检测 双波混合 

分 类 号：TH89[机械工程—仪器科学与技术]