A Synchronous Measurement System for the First Derivative of Out-of-Plane Deformation of Double Ends

作者：Wu, Shuangle; Yao, Yanfeng; Wang, Biao; Wang, Yonghong^*; Yang, Fenglong

来源：IEEE Transactions on Instrumentation and Measurement, 2022, 71: 7004308.

DOI：10.1109/TIM.2022.3172435

• Strain
• Area measurement
• Extraterrestrial measurements
• Measurement by laser beam
• Phase measurement
• Interference
• Temperature measurement
• Independent adjustment of shear and spectrum
• nondestructive testing
• shearography
• synchronous measurement of double ends

In current practical applications, synchronously obtaining the information about out-of-plane deformation of double ends is often necessary. However, traditional measurement systems cannot achieve the synchronous measurement of double ends, as two sets of measurement systems are often needed. This study solves the problem by designing a synchronous measurement system for the first derivative of the double-end deformation based on shearography. The first derivative distribution of the double-end deformation is measured synchronically by imaging the two end surfaces in different areas of the camera's target plane through different shear structures. In addition, by placing apertures in each Michelson shear structure, the synchronous dynamic measurement of both ends and the independent adjustment of the shear and spectral distribution in the Michelson shearography system are realized. The principle of the measurement system is introduced in detail, and the feasibility and practicability of the proposed system are verified by experiments.