电子错位散斑干涉系统中错位量的研究  

Research of Shear in Electronic Shearography Speckle Pattern Interferometry

作　　者：林翠翠[1] 刘文耀[1] 王晋疆[1] 

机构地区：[1]天津大学精密仪器与光电子工程学院,天津300072

出　　处：《光电工程》2012年第3期88-93,共6页Opto-Electronic Engineering

摘　　要：电子错位散斑检测系统中,错位量对测量精度、灵敏度以及条纹对比度有很大影响。本文介绍了电子错位散斑干涉原理,研究了错位量与测量精度、灵敏度和条纹对比度之间的对应关系,并利用MATLAB模拟出不同错位量下干涉条纹图,将错位散斑模拟条纹图与理论分析有效结合,总结出选取错位量的方法,并将其应用于轮胎变形检测实验,取得了良好的实验效果。本文研究工作对无损检测中错位量定量选取具有实际指导意义。In electronic speckle shearing test systems, the shear has a big impact on measurement accuracy, sensitivity, and the fringe contrast. This article introduces the principle of electronic speckle shearing interferometry and the relationship among shear and measuring accuracy, sensitivity, and the fringe contrast map. And MATLAB is used to simulate the electronic shearography speckle pattern under different amount of shearing and generate a lot of valid images The method for selecting shear is proposed through the combination of theoretical analysis and simulation. Tire deformation detection experiment achieves good results by using the method and verifies the effectiveness of the method The research work on this article plays a practical guiding role on selection of shear in nondestructive detection system.

关 键 词：电子错位散斑干涉 错位量 无损检测 

分 类 号：O436.1[机械工程—光学工程]