Method and system for acquiring railway track data based on railway track detection device

The embodiment of the invention provides a method and system for acquiring railway track data based on a railway track detection device, and belongs to the field of non-contact detection of rail transit. Target balls are arranged at different positions on the inner side of a track of a to-be-detected area of the railway track, and the method comprises the following steps: acquiring pose data under a combined navigation coordinate system, contour data under a laser scanner coordinate system and calibration parameters among a plurality of laser scanners, and converting the contour data under the laser scanner coordinate system into a combined navigation coordinate system, and fusing the combined pose data to obtain coordinate data of the railway track. Thus, the calibration parameters are determined by arranging the centers of the target balls at different positions on the inner side of the track of the to-be-detected area, synchronization of the multiple laser scanners is achieved based on the calibration para