Method for measuring position of linear motor mover based on machine vision

The invention discloses a method for measuring the position of the linear motor mover based on the machine vision, comprising the following steps: the preparation step, engraving a non-periodic fenceimage on the linear motor stator as a target image along the moving direction of the linear motor mover, and mounting a high speed camera on the linear motor mover; the acquisition step, acquiring thefence image of the linear motor mover by the high speed camera in real time; the calculation step, calculating a phase correlation function of the adjacent fence images using a phase correlation algorithm; the fitting step: obtaining a sub-pixel displacement value of the adjacent fence images by using a bilinear fitting according to a peak distribution characteristic of a phase correlation spectrum; the position acquisition step: calculating and obtaining the exact position of the linear motor mover in combination with a system calibration coefficient. According to the method for measuring position of linear motor mov