Research Article

An Experiment Monitoring Signals of Coal Bed Simulation under Forced Vibration Conditions

Table 4

Technical data of microseism sensor.

Index/modelUnitSF1500S/SF1500SN

Linear output rangeg peak value±3
Sensitivity (differential)V/g1.2 (2.4)
Frequency response HzDC to 1500
Frequency response (differential signal)HzDC to 5000
Dynamic range (100 Hz BW)dB120
Noise (10 to 1000 Hz)ngrms/300 to 500
Transverse impedancedB>40
Impact of restrictionsg peak value1500
Vibration (20 Hz–2000 Hz)g peak value60
Operating temperature °C40 to +125
Temperature sensitivity coefficientppm/°C75
Drift thermal coefficientμg/°C±100
Linearity error% full scale±0.1
Input voltageVolts DC±6 to ±15
Static currentmA11.6