The method of ESSPI is usually applied in NDT/NDI(non-destroyed test/inspection) on the scene for its steady patten and low environmental requirements.The principle of the theory of these measuring methods and the temporal phase-shift method of ESSPI are%电子剪切散斑的图像稳定,对测量环境的要求低,可用于现场的无损检测。本文介绍了散斑干涉测量的原理与电子剪切散斑干涉时间相移法,并应用此方法对金属梁的位移场进行测量。
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