ZHENG Wei-Hua, . DISPLACEMENT MEASUREMENT BY ULTRASONIC SPECKLE DIGITAL INTERFEROMETRY[J]. MECHANICS IN ENGINEERING, 2008, 30(1): 75-78. DOI: 10.6052/1000-0992-2007-124
Citation: ZHENG Wei-Hua, . DISPLACEMENT MEASUREMENT BY ULTRASONIC SPECKLE DIGITAL INTERFEROMETRY[J]. MECHANICS IN ENGINEERING, 2008, 30(1): 75-78. DOI: 10.6052/1000-0992-2007-124

DISPLACEMENT MEASUREMENT BY ULTRASONIC SPECKLE DIGITAL INTERFEROMETRY

  • This paper proposes a method of measuringdisplacement by ultrasonic speckle interferometry. Base on the digitalinterferometry method and phase-shift---frequency-shift principle,formulas for theultrasonic speckle digital interferential measurement are deduced.In order to verify the theoretical results, an experiment of measuringin-plane and out-of-plane displacements of an aluminous specimen isperformed. The experimental results indicate that the theoretical analyses arecorrect and the method can be applied in measuring displacementsand deformations.
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