Measurement Method for Plane Transverse Vibration of Hoisting Steel Wire Rope by Hough Transform

To solve the difficulty that transverse vibration displacement of moving steel wire rope cannot be easily acquired, the present study proposes a method using Hough transform to measure plane transverse displacement of hoisting rope. According to the feature that the steel wire rope is mapped into the image with a form of line, first, image binaryzation, thinning, dilation and noise reduction are carried out on the initial static image, line extraction and coding are then conducted by Hough transform. Subsequently, a precision solving method to get the measured point on the line is developed based on the results of Hough transform; then, camera calibration is done with edge detection, on the basis of the region of interest, the dynamic displacement of the measured point is acquired by pixel traversing. Eventually, a measurement software system using MATLAB GUI is developed to obtain the plane transverse vibration displacement of steel wire rope. The presented method can help realize the non-contact, full-filed measurement of steel wire rope, which may be used in the mine hoisting system, elevator-hoisting system or other hoisting equipment.