Research On The Transverse Vibration Characteristics Of The Catenary Of The Multi-rope Winding Hoisting System Based On Machine Vision

With the development of social economy,China's energy structure is constantly adjusting and changing,energy demand continues to grow,the surface shallow mineral resources are about to be exhausted,and the reserves can not meet the needs of modern industrialization,so ultra deep mining has become the key way of deep mining resources.The hoist is the key equipment to realize the development of ultra deep mineral resources,in which the steel wire rope is an important part of the hoisting system and the key to the efficient and safe operation of the hoisting system.In this paper,for the multi rope winding hoisting system,the method of theoretical analysis and experimental research is used to study the transverse vibration characteristics of the steel wire rope,which can evaluate the operation state of the hoisting system and predict the possible faults,which is of great significance to the safety production of coal mine.The main contents include the following aspects:The principle of producing the transverse vibration of the suspension rope is studied.Aiming at the multi rope winding hoisting system,the structural characteristics of rope groove and the winding process of wire rope along the winding drum are analyzed,the drum excitation function in the winding process of wire rope is established,and then the excitation displacement signals under different lifting speeds are calculated based on the numerical model,and the characteristics of the excitation signals are analyzed on this basis.The vision measurement method of transverse vibration of steel wire rope is established.On the basis of Region of interest(ROI),the wavelet edge extraction algorithm with adaptive threshold setting is used to improve the detection accuracy of steel wire rope contour.Through binary processing and matrix centroid method,the centroid position of steel wire rope in ROI area is obtained.The periodic excitation caused by displacement of steel wire rope is removed by empirical mode decomposition,and the transverse direction of steel wire rope is obtained Finally,the measurement software is developed,and the accuracy verification experiment of the measurement method is designed.The experimental results show that the method has a high accuracy of transverse vibration displacement detection and can meet the needs of transverse vibration measurement of steel wire rope.The transverse vibration test of suspension rope of multi rope winding hoisting system is carried out.The transverse vibration test method of the multi rope winding hoisting test system is designed,and the transverse vibration signal of the suspension rope under the experimental condition is obtained.Compared with the excitation frequency applied by the drum,the response frequency of the transverse vibration of the suspension rope and the natural frequency of the suspension rope,it is concluded that the transverse vibration of the suspension rope is mainly affected by the excitation applied by the drum,and is related to the lifting speed and the quality of the lifting container.The influence of lifting speed on the transverse vibration of suspension rope is analyzed.Fitting the transverse vibration displacement of the steel wire rope to get the transverse space vibration shape of the suspension rope,studying the transverse space vibration displacement and the moving space range of the suspension rope under different lifting speeds,and getting the relationship between the transverse vibration displacement of the suspension rope and the lifting speed.The influence of lifting speed on the stability of interlayer transition of wire rope is analyzed.