Deformation and vibration inspection using a line-scan imaging system

Eryi Hu; Yuming He; Yu Hua

doi:10.1117/12.839313

25 August 2009 Deformation and vibration inspection using a line-scan imaging system

Eryi Hu, Yuming He, Yu Hua

Proceedings Volume 7375, ICEM 2008: International Conference on Experimental Mechanics 2008; 73754N (2009) https://doi.org/10.1117/12.839313
Event: International Conference on Experimental Mechanics 2008 and Seventh Asian Conference on Experimental Mechanics, 2008, Nanjing, China

Abstract

A line-scan CCD camera is used in the profile measurement of a moving object with a variable speed. The deformed fringe pattern of the moving object is captured by an image system combined with a line-scan CCD camera and a speed coder. The relative moving speed is fed back to the computer for synchronizing the moving object and the line-scan camera. Fast Fourier transform technique is used to extract the phase change caused by the profile of the detected object. The feasibility of this method is proved by experimental results. In addition, the line-scan CCD camera is also used to measure vibration characteristics of a string. The CCD line array sensor is set parallel to the vibration direction of a tensile string. The fundamental frequency of the vibrating string can be obtained from the acquired images by digital image process technique. The vibration frequencies of a steel string with different tensile force are studied and experimental results are compared with theoretical values.

Citation Download Citation

Eryi Hu, Yuming He, and Yu Hua "Deformation and vibration inspection using a line-scan imaging system", Proc. SPIE 7375, ICEM 2008: International Conference on Experimental Mechanics 2008, 73754N (25 August 2009); https://doi.org/10.1117/12.839313

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