基于激光超声峰值重建算法的盆式绝缘子缺陷检测研究

Research on basin insulator defect detection based on laser ultrasonic peak reconstruction algorithm

基于激光超声技术研究了一种表面波的峰值重建算法,搭建二维激光激励扫描式激光超声检测盆式绝缘子的实验平台,对人工制作的气泡、杂质、裂纹缺陷进行检测研究,并对实际现场应用中带有裂纹故障的盆式绝缘子进行离线检测。结果表明:基于激光超声峰值重建算法重建的峰值图像能够较好地反映扫描区间盆式绝缘子的缺陷信息,证实了该方法可以实现对盆式绝缘子表面裂纹缺陷的离线检测。

On the basis of laser ultrasonic technology, a peak reconstruction algorithm of surface wave was studied, and an experimental platform of two-dimensional laser excitation scanning laser ultrasonic detection for basin insulators was built.Then the artificial bubble, impurity, and crack defects were detected and studied, and the basin insulator with crack fault in practical field application was carried out off-line detection. The results show that the reconstructed peak image based on laser ultrasonic peak reconstruction algorithm can better reflect the defect information of basin insulator in scanning interval,which proves that this method can realize the off-line detection of surface crack defect on the basin insulator.