The Research Of The Integrated Automation System In The Coal Mine Underground Based On The Spread Spectrum Technology

For to meet the requirements of the integrated automation system in the underground coal-mine, and based on full consideration of characteristic of the spread spectrum communication on the low-voltage electric, which is economic, convenient, strong anti-jamming, high reliability, so this paper designed the integrated automation system in the underground coal-mine based on the spread spectrum communication technology.This paper introduces the basic principle of spread spectrum communication, and discussed the application of the spread spectrum technology in the power line, then proposed the solution that based on the characteristics of the power line in the underground coal mine. The system based on the spread spectrum is consisted by the upper computer and the lower computer, including control module, spread spectrum module, audio processing module, the power supply module, and the lower level computer system teleport the data ,which come from the collected sensors, to AC127V power lines after modulation by the spread spectrum carrier chip SC1128, the data includes status of the running equipment and the setting of the parameters and etc, then these data received by the upper computer system after the demodulation by the SC1128 chip, and the then display this data to the MT-8000 screen, through the man-machine interface real-time monitoring status of running equipment in the underground coal mine.The paper has designed the software and the hardware, and tested the circuit, which validate the theory is right. Experiments prove that it is feasible for the spread spectrum communication is being applied in underground low power lines, thus can be completed integrated automation system construction in the underground coal-mine.