Masw Refraction Reflection Seismograph Borehole Seismic Survey Instrument 24channels Seismometer Engineering Seismograph with Seismic Geophone

Product Details
Customization: Available
Accuracy: 1mm
Horizontal Line: 1
Manufacturer/Factory & Trading Company
Diamond Member Since 2007

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Year of Establishment
2009-09-11
Plant Area
377 square meters
  • Masw Refraction Reflection Seismograph Borehole Seismic Survey Instrument 24channels Seismometer Engineering Seismograph with Seismic Geophone
  • Masw Refraction Reflection Seismograph Borehole Seismic Survey Instrument 24channels Seismometer Engineering Seismograph with Seismic Geophone
  • Masw Refraction Reflection Seismograph Borehole Seismic Survey Instrument 24channels Seismometer Engineering Seismograph with Seismic Geophone
  • Masw Refraction Reflection Seismograph Borehole Seismic Survey Instrument 24channels Seismometer Engineering Seismograph with Seismic Geophone
  • Masw Refraction Reflection Seismograph Borehole Seismic Survey Instrument 24channels Seismometer Engineering Seismograph with Seismic Geophone
  • Masw Refraction Reflection Seismograph Borehole Seismic Survey Instrument 24channels Seismometer Engineering Seismograph with Seismic Geophone
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Basic Info.

Model NO.
WZG
Vertical Lines
1
Product Name
Masw Refraction Reflection Seismograph
Channels
24channels Seismograph
Method
Masw/Refraction/Reflection/Downhole Seismograph
Resolution
High Resolution Seismograph
Geophone
24PCS Geophone Seismograph
Type
Engineering Seismograph
After-sales Service
Yes
Warranty
1 Year
Transport Package
Wooden Case
Specification
ISO9001
Trademark
Gold
Origin
Chongqing
HS Code
9015800090
Production Capacity
100 Units/Month

Product Description

Masw Refraction Reflection Seismograph Borehole Seismic Survey Instrument 24channels Seismometer Engineering Seismograph with Seismic Geophone
Masw Refraction Reflection Seismograph Borehole Seismic Survey Instrument 24channels Seismometer Engineering Seismograph With Seismic Geophone

MASW is an acronym of Multichannel Analysis of Surface Waves.  It is a seismic exploration technique. It evaluates ground stiffness by measuring shear-wave velocity (Vs) of subsurface in 1-D, 2-D, and 3-D for various types of geotechnical engineering projects in the most common depth range of 0-30 meters. 

Masw Refraction Reflection Seismograph Borehole Seismic Survey Instrument 24channels Seismometer Engineering Seismograph with Seismic Geophone


MASW first measures seismic surface waves generated from various types of seismic sources-such as sledge hammer-analyzes the propagation velocities of those surface waves, and then finally deduces shear-wave velocity (Vs) variations below the surveyed area that is most responsible for the analyzed propagation velocity pattern of surface waves.  Shear-wave velocity (Vs) is one of the elastic constants and closely related to Young's and shear moduli.  Under most circumstances, Vs is a direct indicator of the ground strength (stiffness) and therefore commonly used to derive load-bearing capacity.

Masw Refraction Reflection Seismograph Borehole Seismic Survey Instrument 24channels Seismometer Engineering Seismograph with Seismic Geophone


Overall procedure to produce a typical 2D S-velocity (Vs) cross section consists of collecting multichannel seismic records at multiple locations as illustrated below.  Each record then generates a 1-D (depth) velocity (Vs) profile, multiple of which will construct the final 2D cross section.

Masw Refraction Reflection Seismograph Borehole Seismic Survey Instrument 24channels Seismometer Engineering Seismograph with Seismic Geophone
 
Channel number 24
Sample stations 1024, 2048, 4096, 8192, 16384
Sample frequency
a, Generally, 10μs, 25μs, 50μs, 100μs, 200μs, 500μs, 1ms, 2ms, 5ms, 10ms,20ms
b, For micro-tremor survey, 1ms ~ 200ms selectable
A/D converter 24 bit
Signal stack and amplification 32 bit
Dynamic range 140dB
Frequency bandwidth 0.1Hz ~ 4000Hz
Noises 1μV(full-frequency state)
Amplitude consistency ±0.2%
Phase consistency ±0.01ms
Time lapse 0~9999ms
Date format SEG-2
Working temperature 0ºC~50ºC, 90%RH
Storage temperature -20ºC ~ +60ºC

In shallow seismic exploration, the commonly used methods are refracted wave exploration method, reflected wave exploration method and surface wave exploration method. The refracted wave exploration method is a long-term and mature method. It uses a large seismic source, can quickly cover a long distance to detect near-surface targets, and can characterize uplift structures with obvious velocity contrasts. It has the advantages of simple operation and high work efficiency. , the first arrival wave is easy to identify, easy to explain and other advantages, these are incomparable to the reflected wave method.

Masw Refraction Reflection Seismograph Borehole Seismic Survey Instrument 24channels Seismometer Engineering Seismograph with Seismic GeophoneMasw Refraction Reflection Seismograph Borehole Seismic Survey Instrument 24channels Seismometer Engineering Seismograph with Seismic GeophoneMasw Refraction Reflection Seismograph Borehole Seismic Survey Instrument 24channels Seismometer Engineering Seismograph with Seismic GeophoneMasw Refraction Reflection Seismograph Borehole Seismic Survey Instrument 24channels Seismometer Engineering Seismograph with Seismic Geophone

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