Development of a nodal rotational seismometer with a micro-electro-mechanical system sensor and testing of H/V spectral ratios
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摘要: 针对当前日益增长的大规模野外地震采集需求, 综合考虑仪器的功能性、经济性与部署便捷性, 研发一种基于MEMS传感器的低成本多功能节点式旋转地震仪RBWL。仪器采用低成本、低功耗的MEMS传感器进行三分量平动(Tx、Ty、Tz)以及三分量旋转(Rx、Ry、Rz)进行地震信号采集。为降低环境因素对测量的影响, 系统自动记录温度、姿态等实时信息, 并对测量结果进行相应补偿校正。为实现采集节点的实时监控与数据传输, 系统集成了基于4G—云端—客户端的数据传输链路, 经实测最大数据传输速率可达100 Mbps。通过开展H/V谱比的实验, 不仅验证了仪器系统功能与主要性能参数, 而且证明了其在工程物探中的应用效果。Abstract: In response to the increasing demand for large-scale field seismic acquisition, this study developed a low-cost multifunctional nodal rotational seismometer (RBWL) with a micro-electro-mechanical system (MEMS) sensor, considering the functionality, economic feasibility, and the ease of arrangement. The RBWL employs a low-cost and low-power MEMS sensor to acquire seismic signals, involving three-component translational motions (Tx, Ty, Tz) and three-component rotational motions (Rx, Ry, Rz). To reduce the impacts of environmental factors on measurements, the system of the RBWL automatically records real-time information including temperature and attitude while performing compensation correction on the measurement results. For real-time monitoring and data transmission at acquisition nodes, the system establishes a data transmission link integrating 4G, cloud, and client, with the measured maximum data transmission rate up to 100 Mbps. The testing of H/V spectral ratios verifies the system functions and principal performance parameters of the RBWL and its effectiveness in engineering physical exploration.
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Key words:
- MEMS /
- rotational seismometer /
- wireless data transmission /
- H/V spectral ratio
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