Motion deviation rectifying method of dynamically measuring rail wear based on multi-line structured-light vision

作者: Junhua Sun , Zhen Liu , Yuntao Zhao , Qianzhe Liu , Guangjun Zhang

DOI: 10.1016/J.OPTLASTEC.2013.02.004

关键词: Process (computing)Laser projectorPlane (geometry)PerpendicularMechanical engineeringComputer scienceLine (geometry)VibrationObservational errorStructured light

摘要: Abstract Rail wear dynamic measurement techniques are important to ensure the security of railway system and efficiency maintaining. Nowadays, a widely used approach is based on structured-light vision sensor, which includes camera laser projector generating light plane inner side rail. Considering sensor installation error vibration running train, it difficult perpendicularity between rail, leads large error. In order overcome problem, motion deviation rectifying method proposed. section profiles obtained by multi-line with multiple parallel planes. Each profile can be segmented into two curves. One representing rail waist fit longitudinal axis (parallel train direction) establish an auxiliary perpendicular direction. Deviation process project onto recover Then another curve head calculate standard profile. The experimental results indicate that reduces error, meeting requirements for real-time wear.

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