Modal identification using multi point synchronous measurement of displacement of railway bridge during train passage using wide angle measurement by high resolution camera

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  • 高解像度カメラの広角測定を用いた鉄道橋りょうの列車通過時変位の多点同期測定によるモード同定

Abstract

<p>In this study, a relation between the displacement and the pixels considering the projection distortion which occurs when projecting the 3D displacement of the object onto the 2D image sensor is formulated. T he error caused by the displacement in the longitudinal direction can be suppressed to 10% or less when considering camera posture and a ngle of view A method for estimating the multi point synchronous displacement of bridges during train passage is proposed by using single high resolution camera with w ide angle lens . The proposed method is applied to three actual bridges and compared with the results of Doppler laser displacement sensor s . V ibration modes contributing resonance phenomenon of the entire bridge deformation can be identified by the method.</p>

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