Development of a MEMS-based seismograph for in-seam wave seismic exploration
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摘要: 当前, 槽波地震数据采集通常是使用矿用数字地震仪配合动圈检波器来实现的, 但是这种数据采集系统存在频带宽度窄、装备量大的问题。为了提高数据质量和施工效率, 利用MEMS加速度计的微型化、频带宽等优势, 将其集成于槽波地震仪的采集卡钟, 设计得到了槽波地震仪。该地震仪可以实现独立型激发, 分布式采集, 频带宽度达到1～800 Hz, 采集数据的质量得到一定程度的提升; 单个仪器质量仅为0.52 kg, 且集成化的设计使地震仪完全摆脱了线缆的束缚, 100道观测系统配备仪器总质量仅为52 kg, 是分布式地震仪总质量的10%, 是节点式地震仪的25%, 装备总质量的下降降低了运输成本, 提高了施工效率。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.
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Key words:
- in-seam wave /
- seismograph /
- MEMS /
- accelerometer
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