基于沃拉斯顿棱镜的错位散斑干涉复合材料无损检测仪

A shearography nondestructive testing instrument for composite based on Wollaston prism

摘要: 激光错位散斑干涉技术具有全场非接触、高精度和高灵敏度等优点,被广泛应用于复合材料的无损检测领域。针对实际工程应用中的复合材料缺陷检测,提出了一种结构紧凑、抗干扰能力强的基于沃拉斯顿棱镜的错位散斑干涉无损检测仪,实现了对缺陷的实时动态检测。使用该检测仪对不同类型复合材料中的缺陷进行检测,检出率可达97%,可检测的最小缺陷尺寸为ϕ2 mm。

Abstract: Shearography technique has the advantages of full-field noncontact, high precision and high sensitivity, and is widely used in the field of nondestructive detection of composites. For the practical engineering application of composite defect detection, a shearography nondestructive instrument based on a Wollaston prism with compact structure and strong anti-interference ability was proposed, so as to realize real-time dynamic defect detection. The system was used to teste the different types of composite materials. It achieved a detection rate of 97% and can detect defects as small as 2 mm.