24 Channel Seismic Refraction Equipment Seismic Seismograph and Seismic Survey Equipment Sismografo with 4.5Hz Geophone Seismograph

Product Description

24 Channel Seismic Refraction Equipment Seismic Seismograph and Seismic Survey Equipment

A seismograph, or seismometer, is an instrument used to detect and record seismic waves. Seismic waves are propagating vibrations that carry energy from the source of an earthquake outward in all directions. They travel through the interior of the Earth and can be measured with sensitive detectors called seismographs. Scientists have seismographs set up all over the world to track the movement of the Earth's crust.
 

How does a seismograph work?

Seismographs record a zig-zag trace that shows the varying amplitude of ground oscillations beneath the instrument. This record is proportional to the motion of the seismometer mass relative to the earth, but it can be mathematically converted to a record of the absolute motion of the ground. These are examples on how seismographs work. Nowadays they are much more modern but the physical principles are the same:

Geophysical equipment used for surface seismic refraction measurement includes a seismograph, geophones, geophone cable, an energy source and a trigger cable or radio link.

What is Seismic Refraction?

Seismic refraction is a useful geophysical method used in the fields of engineering geology, geotechnical engineering, and exploration geophysics. The seismic refraction method utilizes the refraction of seismic waves at the interface between subsurface/geological layers in order to characterize the subsurface geological structure and rock properties.

Seismic refraction utilizes hammer/gun/explosive source at the surface and records earth responses via an array of geophones or hydrophones. The travel-times of first arrivals are derived from the data and then processed to develop 2D/3D subsurface models.

 

What is Seismic application:

Applications:
• Mapping bedrock tomography and overburden thickness
• Locating buried channels
• Investigating faults, sinkholes and other geohazards
• Landfill investigation
• Estimation of depth to water table
• Estimation of rock rippability

What is technical for seismic seismograph?

Sample stations	1024, 2048, 4096, 8192, 16384
	Micro-seismic survey, 1M sampling, several notches
Sampling frequency	10μs, 25μs, 50μs, 100μs, 200μs, 500μs, 1ms, 2ms, 5ms, 10ms, 20ms
	Micro-seismic survey: 1ms~200ms, selectable
A/D converter	24-bit
Signal stack and amplification	32 bit
Dynamic range	144dB
Frequency pass bands	0.1Hz~4000Hz
Noise	1μV(full-frequency)
Amplitude consistency	±0.2%
Phase consistency	±0.01ms
Lapse-time	0~9999ms
Host computer (Industrial PC)
PIII 533MHz
EMS memory	128M
Disk	no less than 40GB
CD-ROM	interior
Display	800 600 VGA LCD (TFT true colour)
Input	Chinese character tablet, small keyboard, photoelectric mouse
Port:	double serial port, one parallel port, double USB port, mouse port,
keyboard port
Flash-Memory	32M
Data format	SEG-2
Software package	Shallow reflection software
	Rayleigh wave software
	Micro-seismic collecting software
	High density and high resolution lateral section survey transaction software
Operating temperature	-10ºC~ +50ºC, 90%RH
Memory temperature	-20ºC~60ºC
Power	DC 12V 4A (5.5A at 48 channel)
Size	400mm×310mm×180mm

24 Channel Seismic Refraction Equipment Seismic Seismograph and Seismic Survey Equipment