Measurement of damping vibration using self-mixing interferometry under strong feedback regime

Bo Wang; Lei An; Bin Liu

doi:10.1117/12.2602542

9 October 2021 Measurement of damping vibration using self-mixing interferometry under strong feedback regime

Bo Wang, Lei An, Bin Liu

Author Affiliations +

Proceedings Volume 11901, Advanced Sensor Systems and Applications XI; 1190113 (2021) https://doi.org/10.1117/12.2602542
Event: SPIE/COS Photonics Asia, 2021, Nantong, JS, China

Conference Poster

Abstract

Damping vibration is one of the most common physical phenomena and an important research topic in the field of mechanical engineering. Self-mixing interferometry (SMI) is a non-destructive and non-contact optical sensing and measurement method. An SMI system commonly operates at weak or moderate feedback regime. The strong feedback regime is always avoided because of the possible instability in this regime. Recently, it has been demonstrated that if an SMI is stable in the strong feedback region, its input and output may maintain a linear relationship under proper operation conditions. In this paper, we proposed to apply an SMI system at strong feedback regime for measurement of damping vibration. The results show that an SMI system at strong feedback regime can achieve linear sensing even without need of extra SMI fringe processing, contributing to a new simple solution for measurement of damping vibration.

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Bo Wang, Lei An, and Bin Liu "Measurement of damping vibration using self-mixing interferometry under strong feedback regime", Proc. SPIE 11901, Advanced Sensor Systems and Applications XI, 1190113 (9 October 2021); https://doi.org/10.1117/12.2602542

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