Seismic Borhole Logging system
 Knocking the shock plate and a shock wave to underground, P&S wave travel downward follow the borehole wall .When the geophones collect the P&S wave, it will also transform the initial arriving time of P&S wave and shock waveform to electronic signal, which is recorded by recording system. The deviation of P &S wave initial arriving time of two points is calculated to know the ground’s wave velocity between two points.

Technical Specification:

Track	1-3 optional	Input impedance	≤10kΩ
Sampling interval	0.03ms-10ms	Trigger method	impulse, make-break
Sampling point	512-16384	Delay:	0-8000ms optional
Vibration compatibility	＜3﹪	Work temperature:	-20℃-40℃
Frequency range	1-1000Hz	Works lose:	about 3.6W
Pre-amplified gain	18-60dB	Weight:	about 6kg
A/D conversion precision	14bit	Time compatibility each track:	<=one sample interval
Power source		12V accumulator charger input voltage 220V±10﹪

 
Workshop Test:
1. Put the cable into the borehole at a average speed. Please pay attention to whether there are any delay and where the diameter change to smaller, then record the place. 
2. Start working , click “Trigger”, knock the plate by big hammer, check the wave form collected; Check whether any problems, then up the cable 1m, when the cable is stable, continue next test. If there are lose ground, enhance work speed to avoid plugging caused by small diameter. 
3. When test work is over, please store the data. 

Result output:

• Reading the initial arriving time
• Slant Distance Calibrating
• Calculate wave velocity at each depth
• Calculate wave velocity by worker conference to generate wave velocity data file.
• Figure output