Research On Dynamic Characteristics And Monitoring System Of Overhead Passenger Equipment

The overhead passenger device,also known as a monkey car,is an auxiliary transportation equipment installed in mines,mainly used for personnel transportation.In recent years,accidents involving overhead passenger devices have occurred frequently throughout the country,causing a large number of casualties every year.The safety of overhead passenger devices has attracted high attention from the industry.This article takes the dynamic characteristics of the unit cableway system during the operation of the overhead passenger device as the starting point for research.Based on the existing problems of the monitoring system,a multi-sensor state monitoring system is constructed based on its operating characteristics,and relevant technologies are studied to study the operating characteristics of the overhead passenger device,improve the monitoring level of the overhead passenger device Ensuring coal mine safety production has important theoretical significance and practical application value.The specific research work is as follows:Firstly,considering the support and fixation conditions of the overhead passenger device suspension chair and the load-bearing steel wire rope,based on the Euler beam model theory,the unit cableway system is simplified as a vibration system model of a moving concentrated load bearing steel wire rope when the suspension chair is moving.Establish the vibration response equation of the unit cableway system in the form of lateral vibration based on the d’Alembert principle,obtain its modal frequency distribution and the vibration time domain response of the system’s load-bearing steel wire rope during the operation of the suspension chair,and analyze the changes in frequency,time domain,and frequency domain of the lateral vibration response under variable operating conditions.The operational status characteristics of overhead passenger devices under four working conditions were theoretically analyzed,providing a theoretical basis for determining the working parameters of the monitoring system and analyzing monitoring data.Secondly,design the overall structure and functional framework of the status monitoring system for overhead passenger devices.The system is constructed from two aspects: hardware and software.The hardware includes five parts: image and parameter acquisition module,main control module,communication module,power module,and speed monitoring and positioning module.The structure and functions of each module have been analyzed and designed in detail;Based on the hardware platform,the monitoring system software is designed into four layers: data acquisition layer,communication layer,data processing layer,and human-machine interface layer.The functions of data collection,transmission,processing,storage,and human-machine interface display are achieved.Once again,research will be conducted on key technologies such as image and vibration signal processing in real-time operation.Obtain the contour of the steel wire rope,the contour of the supporting rope pulley,and related contour parameters through image processing algorithms.Use geometric analysis methods to study the recognition of the relative position of the supporting rope pulley and the steel wire rope,and design experiments to verify the robustness of the algorithm;In the vibration acceleration data processing algorithm,for the error model,the error is compensated and Kalman filtering is performed.Based on the characteristics of the acceleration data,the swing attitude angle of the suspended chair is calculated,and the operation warning method for the overhead passenger device is designed by integrating image,acceleration,and swing attitude angle data.Through the processing of the above algorithms,the status monitoring system of aerial passenger devices can better complete the tasks of monitoring and early warning.Finally,functional experiments were conducted on the monitoring system using an experimental platform,and the results of vibration and image experiments were analyzed to verify the functionality and feasibility of the vibration model and monitoring system.This thesis has 71 figures,10 tables,and 94 references.