Visual Detection Method for Spatial Transverse Vibration Displacement of Wire Rope in Multi-point Synchronous Hoisting System

In order to detect the healthy running state of wire rope efficiently and accurately in multi-point synchronous hoisting system, this paper proposed a method based on orthogonal image technology to detect the spatial transverse vibration displacement of wire rope. Firstly, two sets of images were captured synchronously at the same frequency by two high-speed video cameras where set vertically each other. Secondly, binarization and calculation of actual vibration displacement of wire rope were carried out with LabVIEW, and recording the real-time vibration of wire rope. At last, empirical mode decomposition method was used to remove the periodic excitation caused by the displacement of rope-arranging. The spatial vibration shape of the wire rope and the vibration trajectory in the cross section of the wire rope were obtained by fitting these data on Matlab. The experimental results show that this method can accurately reflect the law of the spatial transverse vibration of wire rope. It can provide technical support for the study of the detection and evaluation of the safety parameters of the hoisting system.