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-  2018 


DOI: 10.13543/j.bhxbzr.2018.01.014

Keywords: 膨胀节,波形拟合算法,点云数据处理,波形逆向重构,
expansion joint
,waveform fitting algorithm,point cloud data processing,waveform reverse reconstruction

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Abstract:The measurement of wave pitch of bellows expansion joints is still in the manual vernier caliper measurement stage, which is not only inefficient, low precision, large labor intensity, but also many other shortcoming. In this paper, a waves pitch detection system of bellows expansion joints based on laser scanner technology was designed, a waveform fitting algorithm and wave pitch detection algorithm for bellows expansion joint was proposed, and a software automatically obtaining the point cloud data, conducting the waveform reconstruction and calculating wave distance had also been developed. The system is suitable for the bellows expansion joint test piece waveform detection, which diameter is from 50mm to 1500mm, the whole length of the double test pieces is from 1500mm-2500mm, and the test pressure is from 0.1MPa-6.4MPa, it can adjust the distance between the scanner and the expansion joints automatically, and eliminate all kinds of interference data, the measurement accuracy of wave distance is 0.05mm.


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