Design And Research On Safety Monitoring And Frequency Conversion Control System Of Coal Mine Hoist

The hoist is not only an important equipment for coal mine safety production,but also a large mine integrating mechanical,electrical and hydraulic complex electromechanical systems.The hoist has a direct impact on the reliability,economy and other characteristics of coal mine production.With the development of the hoist system in the direction of large-scale,high-speed,mechatronics and structural complexity,the requirements of the hoist system for safety monitoring and intelligent control are getting higher and higher.According to the development status of computer technology,detection technology,network communication and fault diagnosis technology,based on the characteristics of mine hoist system,the safety monitoring and frequency conversion control system of coal mine main hoist is designed,and the hoist in safety monitoring system is designed.In-depth study of transmission temperature prediction.The specific research work is as follows:Firstly,the current research status of the hoist system under the background of current technology development is analyzed,and the research results of many experts and scholars at home and abroad are analyzed;Based on the overall structural plan of the main shaft hoist of the coal mine,the hardware,software and mechanical system structure of the main hoist of the coal mine are analyzed,especially in the functions,circuit diagrams and sofhtware parts of the important modules of the hardware.Secondly,it sorts out the realization of the principle and the design of the overall structure of the coal mine main shaft hoist and the frequency conversion control system,and selects and demonstrates the important components of the whole set of lifting control system,such as:high and low voltage power distribution part,variable frequency transmission design Part,electronic control part,safety protection system design and other aspects are analyzed and demonstrated one by one to ensure that the entire main shaft hoist control system is technically feasible.Thirdly,aiming at the problem of poor safety and stability of the operation of the hoist control system,the frequency conversion control system of the main shaft hoist of the coal mine is designed and proposed.At the same time,according to the safety,reliability,stability and eff-iciency of the system operation,the hardware of the system is properly selected,and some mainstream technologies and products on the market are selected and matched,and the AC inverter introduced in this paper is rationally selected,and then selected high.The reliable and high-precision encoder is matched with the control of the frequency converter to realize the intelligent control of the whole coal mine main shaft hoist inverter control system.Finally,in view of the noise problem of the hoist transmission temperature data,the fuzzy C-means clustering denoising of the hoist transmission temperature data is used to identify the abnormal points,and the characteristic curve is used to identify and correct the noisy data.The example analysis proves that the method has good denoising effect and practicability.At the same time,based on the pretreatment of temperature data,the PSO-BPNN temperature prediction method of hoisting gearbox is proposed and verified by simulation software.The simulation results show that the PSO-BPNN temperature prediction model has higher prediction accuracy and shorter convergence time than BPNN algorithm.