Research On Electro-hydraulic Control System Of Hydraulic Support Based On Wireless Communication And CAN Bus

The hydraulic support is the main support equipment for the coal mining face.In order to increase the support efficiency of the working face and reduce the labor intensity of the workers,the electrohydraulic control system is adopted for most work surfaces.However,the working face of the fully mechanized coal mining face is rather harsh and has high requirements on the reliability and anti-interference of the control system.Therefore,the hydraulic support voltage control system used in the coal mining face of China’s coal mines depends on imports,which makes the equipment expensive.It is difficult to upgrade.At the same time,with the development of science and technology,the existing hydraulic support electro-hydraulic control system has also exposed the problems of low intelligence and backward communication methods.At the same time,with the increase of the number of hydraulic support sensors,the work surface wiring becomes more and more difficult,and the circuit is easily worn and also affects the communication.System reliability.In response to the above problems,the system adopts the combination of CAN bus and wireless communication to complete the design of the entire control system,so that the system has the functions of local control,automatic follow-up racking,data acquisition,and remote monitoring while minimizing the The difficulty of routing the work surface,based on this,the use of ant colony-particle swarm fusion algorithm to optimize wireless communication routing,improve communication quality and real-time.The main research contents of the paper are as follows:1.Determine the overall scheme of the system.In order to reduce the difficulty of wiring on the work surface based on the guarantee of stable communication,a communication method that combines CAN bus and wireless communication is proposed.After analyzing the typical topology of the ZigBee communication network,it is proposed to be suitable for electro-hydraulics.The network topology of the control system;the required functions of the control system are designed based on the field process flow.2.The stand controller uses the embedded chip STM32F103ZET6 as the main control core,and designs the power supply circuit,signal acquisition circuit,keyboard circuit,LCD liquid crystal display circuit,CAN bus communication circuit,and wireless communication circuit according to the functions.The controller’s immunity to interference was fully considered,and the PCB board was designed using Altium Designer.3.Completed the software design of the electro-hydraulic control system,including the software programming of the main control chip and the software program design of the ZigBee chip.In order to improve the real-time and stability of CAN bus communication,an improved dynamic priority scheduling algorithm was introduced.4.The path optimization problem of wireless communication network is studied.The ant colony-particle swarm fusion algorithm is proposed to optimize the routing method of wireless communication network.The traditional particle swarm algorithm is improved and the real-time performance of wireless communication is improved and the packet loss is reduced.rate.