On-line detection of wheel set geometric parameters based on optical cross section image

mounting position of planar array CCD camera are greatly restricted because of particularity of detecting environment

and there exist a large distortion of the collected image. A new method is proposed to calculate wheel set geometric parameters based on camera along tilt angle collecting optical curve image. According to tilt angles of camera in three direction in space

calculate position of the key points in the image

and calculating the object length. Finally calculation of wheel set flange height and flange thickness are completed. Verification experiment is designed according to site installation position

and the experimental result shows that

the detection precision of this method can reach ± 0. 2 mm.