Application No./Patent No.: 2019112512605 Application date: December 9, 2019.
Inventor/Designer: Li Xiaogang, Sun Weifang, Li Fengping, Ma Guang, Zhang Zhe Ammonium, Yan Guozhu and Lu Yonghao.
The invention discloses a visual measurement method of ball screw parameters based on dual-tree complex wavelet, which comprises the following steps: acquiring a ball screw normal section image through an image acquisition device; Acquiring low-frequency component information data of the collected ball screw normal cross-section image by a dual-tree complex wavelet method; Acquiring image edge contour information data of a ball screw normal section image by using a non-maximum suppression method; Acquiring a theoretical circular arc template of a ball screw, and performing correlation calculation on information data in the theoretical circular arc template and image edge contour information data to determine coarse positions of two circular arcs of the ball screw; The regional position information data of the double circular arc is found through the coarse position, and the center and radius information data of the double circular arc are fitted by the least square method, and the ball thread carrying parameters are calculated. The method has the characteristics of strong anti-noise interference capability and convenient adjustment of the measurement interval.
