Synchronous high speed multi-point velocity profile measurement by heterodyne interferometry

Xueqin Hou; Wen Xiao; Zonghui Chen; Xiaodong Qin; Feng Pan

doi:10.1117/12.2267051

10 February 2017 Synchronous high speed multi-point velocity profile measurement by heterodyne interferometry

Xueqin Hou, Wen Xiao, Zonghui Chen, Xiaodong Qin, Feng Pan

Proceedings Volume 10250, International Conference on Optical and Photonics Engineering (icOPEN 2016); 102500N (2017) https://doi.org/10.1117/12.2267051
Event: Fourth International Conference on Optical and Photonics Engineering, 2016, Chengdu, China

Abstract

This paper presents a synchronous multipoint velocity profile measurement system, which acquires the vibration velocities as well as images of vibrating objects by combining optical heterodyne interferometry and a high-speed CMOS-DVR camera. The high-speed CMOS-DVR camera records a sequence of images of the vibrating object. Then, by extracting and processing multiple pixels at the same time, a digital demodulation technique is implemented to simultaneously acquire the vibrating velocity of the target from the recorded sequences of images. This method is validated with an experiment. A piezoelectric ceramic plate with standard vibration characteristics is used as the vibrating target, which is driven by a standard sinusoidal signal.

Citation Download Citation

Xueqin Hou, Wen Xiao, Zonghui Chen, Xiaodong Qin, and Feng Pan "Synchronous high speed multi-point velocity profile measurement by heterodyne interferometry", Proc. SPIE 10250, International Conference on Optical and Photonics Engineering (icOPEN 2016), 102500N (10 February 2017); https://doi.org/10.1117/12.2267051

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