Microseismic Monitoring, Positioning Principle, and Sensor Layout Strategy of Rock Mass Engineering

Table 2

Technical parameters of each component.

Name	ESG microseismic monitoring system (MMS)
Digitization	24-bit analog-to-digital conversion
Sensor	The sensor has a sensitivity of 30 V/g and a maximum output signal of ±5 V. 30-channel accelerometer
Network expandable channels	Powerful integrated functions can be expanded to 256 channels
Signal trigger mode	Threshold or STA/LTA
Signal voltage
Power supply voltage	220VAC
Dynamic response range	>115 dB
Data storage	Data storage can be expanded to 256 MB of 32 MB internal solid-state storage (USB, HDD can be selected), can record, and save continuous data
Data storage format	Binary and access files to facilitate users to obtain information on up to 16 event characteristics
Signal sampling rate	50 Hz-10 kHz
Signal bandwidth	DC-1/4 sampling rate
Signal gain	0, 6, 20, and 40 dB
Auxiliary gain	6-72 dB
Energy consumption	<10 W
Power supply	12VDC