电子错位散斑的实时时间差技术

Real—time Interval Technique on Electronic Shearing Speckle Pattern Interferometry

本文提出了一种电子错位散斑干涉(ESSPI)的实时时间差技术,并从原理上进行了分析,说明该方法不仅可用于无损检洲,而且还能用于连续变形物体的离面位移及瞬态大变形问题的测试。文中给出了该技术用于无损检测方面的一些结果。

Electronic shearing speckle pattern interferometry(ESSPI)is a new ap- proach in photomechanics,which has played a special role in stress/strain analysis and intensity non-destructive testing(NDT).In this paper,the method of real-time inter- val on ESSPI is extended and studied by employing video-signal processor coupled with ESSPI interferometer.Theoretical analysis and experimental results are presented.It is shown that this technique is a convenient and fast method for nondestructive testing.