Laser ultrasonic visualizing inspection of surface defect in aluminum plate
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摘要: 激光超声可视化检测技术是一种新型检测技术,与传统检测方法相比,该技术具有检测速度快、检测距离远、无检测盲区等优点。研究了一种基于超声信号峰峰值三维最大振幅及三维波场重建的检测算法,搭建了基于脉冲激光激励、压电探头接收超声信号的激光超声可视化检测系统,并对铝板表面裂纹缺陷进行检测。试验结果表明,激光超声可视化检测技术可快速检出铝板表面的裂纹缺陷,并且能够三维地显示表面裂纹的位置及大小信息,能够实时显示出三维超声波场的传播及反射情况。Abstract: Laser ultrasonic visualizing is a new type of inspection technology. Compared with traditional detection a method, this technology has the advantages of rapid detection, long-distance, and no detection blind areas. A detection technology based on three-dimensional maximum amplitude and three-dimensional wave field reconstruction detection algorithm for ultrasonic signal peak-to-peak values was studied. A laser ultrasonic visualization detection system with pulse laser excitation and piezoelectric probe receiving ultrasonic signals was established to detect surface crack defects in aluminum plates. The results showed that the laser ultrasonic visualization detection technology can quickly detect cracks defects on the surface of aluminum plates, and can display the position and size information of surface cracks in 3D, as well as real-time display of the propagation and reflection of 3D ultrasonic field.
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Keywords:
- laser ultrasonic /
- visualizing inspection /
- metal sheet /
- surface defect
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