Development of a MEMS-based seismograph for in-seam wave seismic exploration
Currently,seismic data acquisition of in-seam waves is typically performed using mine-orientated digital seismographs com-bined 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.
万方数据
维普
