The Design And Realization Of Coal Mine Signal Transmission System Based On Modulation And Demodulation Technology

In recent years,with the increasing of coal production and safety production management efforts of the government,the mine information data remote transmission and become part of the coal output measurement and management is an indispensable,explosion-proof measuring instruments and thus become a focus in the field of mining products,the number according to the remote transmission is the key to solve the problem.This paper introduces a kind of based on MCU and modulation and demodulation technology of coal mine data remote transmission system,the system is mainly to complete the function including the coal production information and the underground environment parameters acquisition,display and overrun alarm,and the collected real-time data sent to the well on the computer for processing.After using the system,the dispatcher can in the dispatch room or remote terminal timely and reasonably scheduling.The system consists of flameproof and intrinsically safe power supply and downhole data acquisition station,Inoue communication management unit and a computer monitoring four subsystems system.In this paper using the idea of modular design to complete the design of the hardware circuit and software program of each subsystem.The design of flameproof and intrinsically safe power supply a total of three outputs for substation and using various sensors;downhole data acquisition system based on UPD78F1166 micro controller as the core,sensor station can be connected to a variety of types,the completion of the coal output information and underground environment parameters collection,processing and transmission;the sensor placed in the front acquisition module the underground in the acquisition of analog can be used when the frequency,voltage,and Collection Substation with 8 switch input and output interface,can control the start and stop of downhole equipment;Inoue communication management unit is mainly responsible for the downhole data acquisition station FSK signal sent for demodulation is sent to the relevant processing machine,Modem module Inoue communication management unit by dialing communication management station requires a Modem to complete the communication task management.The system line connection is simple,can adapt to the coal mine of harsh environment,with good versatility,and with the expansion of advantages,ease of debugging,installation and maintenance;computer monitoring system using VB6.0 can real-time display of coal production and underground environment conditions,and has the inquiry function,facilitate the Inoue staff statistical information related to.The prototype in the laboratory debugging and running that,the system can achieve design requirements,good real time,simple structure,suitable for small coal mine of cost and maintenance requirements of simplicity can bring great convenience to the dispatch work of mine.At the same time can be achieved centralized safety testing in a mining area,provides a simple and feasible design of remote monitoring system.