Vibration Behavior during Underground Drilling Based on an Innovative Measurement Method and the Application

Table 1

Parameters of the detector.

Parameters	Parameter values
Channel number	1∼3 optional
Sampling frequency	Single tunnel 1∼7000 Hz optional and three tunnels 1∼2000 Hz optional
Timing standard	Ground GPS satellite timing
Timing equipment	High-precision clock chip
Data storage device	Hard disk in device
Hard disk capacity	16 G
Battery endurance	More than 96 h
Boundary dimension	200 mm ∗ 280 mm ∗ 110 mm
Isolation voltage	1500 VAC/60 s