Mine pressure signal real-time visual demodulation system and demodulation method based on optical fiber sensing

Abstract

The present invention relates to a mine pressure signal real-time visual demodulation system and demodulation method based on optical fiber sensing. The demodulation system is mainly formed by a mine pressure signal acquisition subsystem, an optical signal transmission subsystem, a photoelectric signal conversion subsystem and a digital signal visual processing subsystem. A mine pressure signal is collected through arranging an optical fiber sensor in a coal mine, the mine pressure signal is transmitted to an optical fiber grating demodulator for a mine in the form of optical waves and is demodulated into wavelength data, the digital signal visual processing subsystem demodulates the wavelength data into a mine pressure physical quantity and automatically outputs a visual mine pressure chart and a mine pressure monitoring report. The system and the method have the advantages that the demodulation system is comprehensive and diversified, the development performance is high; the system equipment is essentially safe and is especially suitable for a complex underground environment; the demodulation algorithm is professional, and the mine pressure demodulation is more accurate; a demodulation result is clear and visual, and the degree of visualization is high; the system response is timely and effective, the underground mine pressure can be displayed in real time, and the safe and efficient production of a coal mine is ensured.

Description

technical field [0001] The invention relates to a mine pressure signal demodulation system and demodulation method, in particular to a mine pressure signal real-time visual demodulation system and demodulation method based on optical fiber sensing. Background technique [0002] In the past one or two decades, the demand and consumption of coal have increased rapidly with the development of my country's economy and society, and the intensity and depth of coal mining have also continued to increase. The accidents caused by mine pressure have become more and more serious, such as mine pressure, Coal mine safety accidents such as roadway deformation occur frequently, which pose a serious threat to the life safety of coal miners and greatly affect the safe and efficient mining of coal mines. These accidents are essentially hidden dangers due to the untimely perception of underground mine pressure dynamics, inaccurate processing of mine pressure signals, and unclear grasp of mine p...

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Problems solved by technology

[0003] At present, the monitoring and processing fields of mine pressure signals at home and abroad mainly include mechanical mine pressure instruments, resistance strain gauge sensors, and vibrating wire pressure sensors controlled by single-chip microcomputers. However, such existing mine pressure signal monitoring systems generally have The following disadvantages: 1. Using manual readings to collect mine pressure signals, the monitoring results are lagging behind, and real-time online monitoring cannot be realized; 2. The signals are susceptible to electromagnetic and external environment interference during the sensing and transmission process, resulting in high signal distortion and poor data reliability; 3. The obtained data needs manual analysis and post-processing, which has a low degree of intelligence and heavy workload; 4. The degree of data isolation is high, making it inconvenient to conduct horizontal and vertical comparative analysis of data, and the information presentation method is not intuitive

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