| Citation: | PENG Cong, MIAO Weidong, ZENG Conget al. Three-dimensional vibration measurement method for lightweight beam based on machine vision[J]. Journal of Beijing University of Aeronautics and Astronautics, 2021, 47(2): 207-212. doi: 10.13700/j.bh.1001-5965.2020.0211(in Chinese)
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Vibration measurement is one of the methods of state detection and fault diagnosis. In view of the loading effect in the current contact vibration measurement method and other problems, this paper studies the three-dimensional vibration measurement method based on machine vision. First, based on the two-dimensional vibration measurement method of video phase, the two-dimensional vibration data of the measured object in the image collected by the camera is extracted. Then, on the basis of two-dimensional vibration measurement method, combined with binocular stereo vision, a three-dimensional vibration measurement method based on machine vision is designed. Finally, the vibration measurement experiment of cantilever beam is performed. The experimental results show that the proposed method can realize non-contact and label free vibration measurement, and can accurately measure the three-dimensional vibration information.
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