基于激光超声衍射体波的缺陷定位定量检测 下载: 1029次
ing at addressing the problem in detecting the internal defects of large thickness materials, the locations and sizes of internal defects are detected through the diffraction effect of defects on laser ultrasonic. First, the Comsol software is used to study the interaction process between laser ultrasonic and internal defects and we establish the calculation model for received laser ultrasonic signals. Using the laser ultrasonic testing system, an experiment on detecting the locations and sizes of defects in a 45-steel block are conducted. The experimental results show that the relative position and size errors in defect detection are within 5% and 10%, respectively. This experiment proves the feasibility of detecting the locations and sizes of internal defects using the laser ultrasonic diffraction bulk wave method. Furthermore, it achieves a non-contact detection via laser excitation and reception.
张进朋, 秦训鹏, 袁久鑫, 汪小凯, 曾研. 基于激光超声衍射体波的缺陷定位定量检测[J]. 光学学报, 2020, 40(12): 1214002. Jinpeng Zhang, Xunpeng Qin, Jiuxin Yuan, Xiaokai Wang, Yan Zeng. Defect Location and Size Detection Based on Laser Ultrasonic Diffraction Bulk Wave[J]. Acta Optica Sinica, 2020, 40(12): 1214002.