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The Research of Mine Microseismic Monitoring System

Author: YangLiHong
Tutor: OuYangMingSan
School: Anhui University of Technology
Course: Power Electronics and Power Drives
Keywords: Microseisms uniaxial geophone the filtering circuit wavelet denoising LPC2388 Ethernet communication
CLC: TD76
Type: Master's thesis
Year: 2013
Downloads: 28
Quote: 0
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Abstract


Mining coal in the coal mine, coal rock bursting phenomenon is caused due to natural or man-made factors can not be avoided. The microseismic events localized within the coal and rock in the form of seismic waves generated by rupture vibration. Rockburst of coal mine roof fall, collapse, shock pressure, coal and gas outburst mine disaster before it occurs, will have some microseismic signal, these microseismic signals if the real-time monitoring and timely prevention, disaster can be considerably reduced losses. So is very necessary to establish a set of advanced features of microseismic monitoring system of coal mine, this paper is to explore the establishment of a microcontroller LPC2388ARM7core-based mine microseismic monitoring system.The main work of this paper is the use of sensor acquisition downhole microseismic signal and amplify, filter, A/D conversion, wavelet denoising, and completed on Ethernet communication between deplaning.The first chapter introduces the research background, current situation and the main research content, made a basic introduction to the second chapter of mine microseismic monitoring technology, and describes the overall system block diagram and the design of the various parts of the program. The third chapter introduces the design of the of mine microseismic monitoring system’s hardware circuit.Respectively, the selection of sensors for detecting microseismic signals, signal conditioning circuits, LPC2388interface circuit. Select G1-1.1-1.0uniaxial geophone sensor; signal conditioning circuit includes amplifier circuit, notch circuit, Butterworth low-pass filter circuit; LPC2388interface circuit including the power supply circuit, reset circuit, clock circuit, JTAG debug circuit A/D converter circuit, liquid crystal display circuit, keyboard circuit, memory expansion circuit, Ethernet-based TCP/IP protocol communication circuit. The fourth chapter describes the system uses real-time operating system, describes the system main program tasks, data processing tasks, data acquisition interrupt service task Ethernet communication tasks the keyboard scan tasks LCD task, data storage tasks.The fifth chapter describes the experiment of mine microseismic monitoring system debugging. Respectively debugging method, the notch circuit simulation Figure, Butterworth low-pass filter circuit simulation microseismic signal wavelet threshold denoising simulation in Fig. Finally, at the end of this article summarized on the system, and look forward to future areas for improvement.

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CLC: > Industrial Technology > Mining Engineering > Mine safety and labor protection > Mine safety monitoring system
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