Develop On The Remote Control System Of Electronic-Hydraulic Terminal Controller Used In Unattended Fully Mechanized Coal Face

The project in this thesis is not only an important subproject of the major project of shanxi province " Research on Technical Equipment of Full-automatic Domestic Unattended Fully Mechanized Coal Face"(NO.:20111101024), but also an important part of the Action project that is a scientific and technical personnel services company project "Coal Face unattendedn Electric and Hydraulic Control System" (NO.:2009GJA30028). It is proposed for lack of remote control system in terminal controller of unattended fully mechanized coal face. The remote control strategy of the electronic-hydraulic terminal controller is presented,a remote control system of electronic-hydraulic terminal controller used in unattended fully mechanized coal face is developed based on microcontroller C8051F020 combined with the actual conditions of high yield and efficiency fully mechanized coal face, aiming at establishing unattended fully mechanized coal face. Lab debugging and field debugging are carried out and the results of testing show that this system realized the functions of a variety of motion control, the acquisition of operating parameters and the modification of status parameters and runs with high safety and reliability.The mainly research works are showed as follows:The current development trend of unattended fully mechanized coal mining face is deeply analyzed on the basis of a large number of domestic and foreign literature and site investigation. The structure and function of remote control system of electronic-hydraulic terminal controller used in unattended fully mechanized coal face are determined which colligated control methods and operating procedures of various unattended fully mechanized coal mining face. The whole control system is composed by an upper computer, the two terminal controllers and numerous hydraulic support controller. The remote control of the hydraulic support is realized by the terminal controller with the assistant of the upper computer and hydraulic support controller according to the acquisition of the operating parameters of unattended fully mechanized coal mining face.Mechanized mining face on-site control was analysised and on the basis of monitoring the operating parameters of the hydraulic props, we built a remote control system of the time threshold parameter threshold to control the end of the first controller. Experiments confirmed the reliability and accuracy of this method and laid a theoretical foundation for the unattended face hydraulic support terminal controller remote control system.On the basis of the full consideration to the requirements of coal for electrical equipment, it designs hardware circuit based on the micro controller C8051F020 as CPU system.The terminal controller hardware system including: the power supply circuit with the core of BAT033T and BAT05T level conversion chip, the display circuit with the core of LCD module (MS12864R),the 5×8 keyboard extension circuit with the core of the intrinsically safe keyboard (TY-40).the the serial communications circuits with the core of MAX485 chip. The above hardware systems ensure that the end of the first controller has interactive features and can be connected to the controlled device.According to procedure service type, it is divided into the primary service temperament procedures and application functions temperament program. The primary service temperament programs include:The keyboard scanning subroutine, the RS485 communication subroutine, the LCD subroutine, and the fault alarm subroutine; The applications subroutine, including single-action control subroutine, a set of motion control subroutine, the online software upgrade subroutine, parameter display and modify subroutine, and the addressing subroutine, encryption subroutine and modify password subroutine.Hardware testing and software debugging about the developed system have been taken in the laboratory. The various indicators of the hardware system meet the standards of coal mine safety and reach the desired design requirements by these tests. After the system is assembled into finished products, the lab debug and on-site commissioning is carried out. The debug results show that:the system structure is perfect; be safe and reliable when long-running; the control of the control object is accurate; and have real-time performance. At the same time, it reaches the predetermined indicators of unattended hydraulic support terminal controller remote control system, and is able to meet the practical requirements of the production. It lays a solid foundation for the establishment of the unattended working face, and accumulates valuable experience.