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随着宇航工业及其它新兴工业的发展,许多开发性工艺技术应运而生。胶接结构、蜂窝结构、复合材料、晶须材料出现和大量工程应用,对测试技术提出了新的要求,本文仅对激光全息、红外线、微波在无损检测领域中的应用作一综述。一、激光全息无损检测1.激光全息无损检测的基本原理本方法实质上是一种微差变形干涉计量技术。它是利用激光具有高度空间相干和时间相干的特性,采用两次曝光(也可用实时法,时间平均法)去推断被检材料内部缺陷的一种新技术。其基本原理是:在
With the development of the aerospace industry and other emerging industries, many development process technologies emerge as the times require. Bonding structure, honeycomb structure, composite material, whisker material appear and a large number of engineering applications, put forward new requirements for testing technology. This article only reviews the application of laser holography, infrared and microwave in the field of nondestructive testing. First, the laser holographic non-destructive testing 1. Laser holographic non-destructive testing of the basic principles of this method is essentially a micro-deformation deformation measurement technology. It is the use of laser with a high degree of spatial coherence and time-dependent characteristics, the use of double exposure (also available real-time method, time average method) to infer the detection of material defects within a new technology. The basic principle is: in