Research on analysis of out-of-planevibration using optical flow

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Journal of Vibration and Shock ›› 2016, Vol. 35 ›› Issue (10) : 18-23.

YIN Ai-jun1,2, Zhang Quan2, DAI Zongxian3,XUE Lei2

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Abstract

Vibration measurement based on vision has been extensively researched and applied due to its large range, non-contact characteristics. The principle of vibrationdetection based on the out-of-plane vision under conventional imaging condition has been investigated. The model of vibrationdetection based on the out-of-plane vision has been builded. According to the principle of the Optical flow motion estimation and the model ofvibrationdetection based on the out-of-plane vision,vibration measurement methods based on the out-of-plane vision usingoptical flow has been discussed.Two basic models of vibrationdetectionbased on the out-of-plane visionusing optical flow has been proposed.Visual vibration detection experiments with cantilever beam have been rigorously compared with finite element simulation to verify the efficacy of the proposed methods. It turns out that the proposed methods can effectively identify the structure of vibration parameters without image feature extraction.

Key words

optical flow / out-of-plane vision / vibration analysis

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YIN Ai-jun1,2, Zhang Quan2, DAI Zongxian3,XUE Lei2. Research on analysis of out-of-planevibration using optical flow[J]. Journal of Vibration and Shock, 2016, 35(10): 18-23

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