基于MEMS的槽波地震仪的研制

doi:10.11720/wtyht.2024.0208

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Abstract

Currently,seismic data acquisition of in-seam waves is typically performed using mine-orientated digital seismographs combined with moving coil geophones.However,such conventional data acquisition system suffers from narrow frequency bandwidths and bulky equipment.To improve data quality and construction efficiency,this study designed a single-channel seismograph for in-seam wave exploration by incorporating a microelectromechanical system(MEMS) accelerometer,with the advantages of wide frequency bandwidth and miniaturization,into the acquisition card.The developed seismograph allows for independent excitation and distributed acquisition,with frequency bandwidths ranging from 1 to 800 Hz,resulting in improved data quality.A single seismograph weighs only 0.52 kg,and the integrated design completely eliminates the constraints of cables.The total weight of the 100 channel observation system is only 52 kg,representing only 10% of the weight of a distributed seismograph and 25% of that of a nodal seismograph system.The reduction in the overall weight contributes to both reduced transportation costs and enhanced construction efficiency.

Key words： in-seam wave seismograph MEMS accelerometer

Received: 09 May 2024 Published: 08 January 2025

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	Peng-Peng ZHAO

Cite this article:

Peng-Peng ZHAO. Development of a MEMS-based seismograph for in-seam wave seismic exploration[J]. Geophysical and Geochemical Exploration, 2024, 48(6): 1684-1692.

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https://www.wutanyuhuatan.com/EN/10.11720/wtyht.2024.0208 OR https://www.wutanyuhuatan.com/EN/Y2024/V48/I6/1684

Principle block diagram of a MEMS-based single-channel seismograph for in-seam wave exploration

System block diagram of ADS1282

Circuit diagram of intrinsically safe power supply

System block diagram of clock system

Electrical connection diagram of LEA-M8T

The operational logic block diagram of a MEMS-based single-channel seismograph for in-seam wave exploration

Physical diagram of in-seam wave seismometer circuit board based on MEMS

Structural design drawing of the seismograph

Physical picture of charging cabinet

Sensitivity of a MEMS-based single-channel seismograph for In-seam wave exploration

Amplitude frequency curve graph

Weight comparison of seismographs in different modes

Sample error trend

Energy analysis of the 88^th channel transmission in-seam wave

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