Influence of piezoelectric transducer displacement error on defect detection in digital shearography speckle pattern interferometry

This paper focuses on the influence of piezoelectric transducer displacement error on the detection ability of digital shearography speckle pattern interferometry. The established model is based on the principle of shearography using ANSYS and MATLAB software. The simulation uses a circular thin aluminum plate with pressure exerted in the center as a model. The simulation conclusions show that when the loading intensity is large, the defect size is big, the defect location is near to the surface and close to loading, and the influence of piezoelectric transducer displacement error on defect detection is weak. Defects can be detected easily. Otherwise, the influence is great, which may hardly detect the defect. To the best of our knowledge, this is the first published paper focusing on the influence of piezoelectric transducer displacement error on the detection ability of digital shearography speckle pattern interferometry. The conclusions can provide some useful guidance to the actual experiment.