In recent years, structured light measurement technology has been widely used in rail profile measurement. Due to the small depth of field of the conventional rail profile measurement with linear structured light, the imaging problem of defocusing blur occurs in the area of rail waist and rail bottom, which leads to low accuracy of rail profile measurement. Therefore, the Scheimpflug condition is applied to the rail profile measurement system with linear structured light, and a constant focus optical path for rail profile measurement is designed. The results show that compared with the conventional measurement optical path, the depth of field of the imaging system is expanded from less than 90 mm to 210 mm, the width of the light strip at the rail waist and rail bottom is reduced and the energy is more concentrated. At the same time, the clear imaging of the rail head, rail waist and rail bottom is ensured, and the rail profile measurement error is reduced from 0.094 mm to 0.071 mm. This method can solve the problem of low measurement accuracy caused by defocusing blur in traditional measurement optical path, and provide a reference for the application of Scheimpflug condition in rail profile measurement.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Research on application of Scheimpflug condition in rail profile measurement


    Contributors:
    Wang, Le (author) / Zhou, Qian (author) / Fang, Yue (author) / Wang, Shengchun (author) / Wang, Hao (author) / Ren, Shengwei (author) / Li, Guoqing (author) / Dai, Peng (author)

    Conference:

    Seventh Symposium on Novel Photoelectronic Detection Technology and Applications ; 2020 ; Kunming,China


    Published in:

    Proc. SPIE ; 11763 ; 117637P


    Publication date :

    2021-03-12





    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English



    3D rail modelling and measurement for rail profile condition assessment

    Rikhotso, Vonani / Steyn, Nico / Hamam, Yskandar | IEEE | 2017


    Measurement of Rail Profile

    Hauk, Martin | IuD Bahn | 2012



    Altitude-Holding Flight with a Scheimpflug Range Sensor

    Liu Xiaoming / Gu Jiali / Chen Wanchun et al. | IEEE | 2012


    Rail head and wheel profile geometry measurement

    Madejski, J. / Grabczyk, J. / Wessex Institute of Technology | British Library Conference Proceedings | 1998