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Displacement observation method and the displacement observation system
Displacement observation method and the displacement observation system
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机译：位移观测方法及位移观测系统
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摘要
PROBLEM TO BE SOLVED: To simply perform accurate displacement observation regarding a bridge girder at low cost.SOLUTION: A displacement observation method includes the steps of: photographing a bridge girder 2 which is an observation target and the side face of a floor slab 7 with a digital video camera 200; extracting still images for every predetermined time from video obtained by photography to perform binarization processing for images within a predetermined range including a flange 5 in the respective still images regarding the flange 5 at a predetermined part, in which a member whose image is included in the still images is H type steel 4, and dimensions in the vertical direction are identified; and specifying a flange end 6 in the images on which the binarization processing is performed within the predetermined range to calculate a displacement amount of the flange 5 on the basis of displacement of unit of the number of pixels among the respective still images at the flange end 6 and the identified dimensions.
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