GS101 Distributed High Precision Land Seismograph

Introduction:

GS101 distributed high precision land seismograph adopt the 32-bit high precision Σ -Δ ADC. It supports ten thousand channel 2D and 3D seismic exploration. The instruments contain industry PC, master station, cross station, acquisition station. The connection structure is very flexible and light. Exploration depth can reach from several meters to thousands of meters. This instrument is applicable to the seismic work such as reflection, refraction, surface wave exploration, pile foundation inspection, pulse, seismic imaging, vibration measurement and wave velocity (shear wave) test etc. The instrument has been widely used for different areas engineering geological exploration such as water conservancy, electricity, roads, railways, bridges, urban construction, transportation, groundwater and resources exploration such as oil, coal, coal-bed methane, shale gas, metals and non-metallic mineral.

Through laboratory and field-proven contrast testing, the main technical parameters have reached an international advanced level, some of them are leading international. Till now we have applied for 9 invention patents, 6 utility model patents, 1 software copyright on high precision data acquisition technology, low noise circuit design, high-speed data transmission with high reliability, low power design,fault-tolerant technology, anti-jamming technology, fault automatic positioning etc.

Connection Diagram

Features:

>32-bit ∑-△ADC, higher conversion precision, lower noise, higher dynamic range

>Single box/station support 2, 4, 6, or 8 channels(optional)

>Distributed design, 3-5 times higher than that of the centralized operation efficiency

>Highly cost effective, save 15–25% cost than other manufacturers

The range of Applications:

1. Foundation, Subgrade and Foundation Engineering Detection

Foundation and subgrade cavity survey and of lava exploration, foundation soil classification and disease geological survey, foundation rock & soil medium physical layer survey, foundation reinforcement effect and roadbed backfill RCC quality survey, bedrock buried depth and concealed geological structure exploration

2. Tunnel Projects Detection

Tunnel route survey and surrounding rock classification, concrete lining quality inspection, the bottom of the tunnel inspection and advanced monitoring and detection, vibration monitoring.

3. Large and Medium-sized Reservoirs Detection

Dam hidden trouble detection, reservoir sedimentation survey and desludging sedimentation effect inspection, large and medium-sized water conservancy construction detection

4. Bridge Projects Detection

Pier foundation type survey, abutment pile foundation concrete quality inspection, bridge vibration monitoring.

5. Environmental and Geological Hazard Detection and Evaluation

Mined-outarea, landslide, karst, landslides, active fault survey.

6. Metaland Non-metallic Mineral Exploration

7. Coal, Coal-bed Methane, Shale gas, Oil and Other resources exploration 2D and 3D Exploration

Typical Applications:

1. 24,48, 96 channels distributed shallow seismograph, small refractometer

2. 96-480 channel 2D engineering seismic or resources exploration

3. More than thousands of 3D seismic exploration

TechnicalParameter:

Type Function Parameters
PC(MC-101) ◆Instrument parameters configuration
◆Real-time status monitoring
◆Data storage, display, drawing and print
Platform Industry computer, main parameters reach the military level
Operating System Windows XP, Windows7-32
Hard Disk >250G
Recording Format Support SEG-2, SEG-Y, SEG-D
Terminal Support printers and drawing
Master Station
(MS-101)
◆Receive data from lower acquisition system
◆Finish data format conversion and cache
◆Transmit the data to the PC for display and storage via USB and RJ45 terminal
◆Support 8pcs auxiliary channels
◆Voltage, temperature and other status monitoring in station
Working Voltage(V) 10 ~ 15, internal or external battery

Power Consumption (W)

4.8
Working Temperature (℃) -40~70
Storage
Temperature (℃)
– 40 ~ 85
Dimension(cm) 19X15X10
Weight 1.5 KG
Terminal Hammer, explosion machine, source car terminal
Cross Station
(CS-101)
◆String acquisition station into a chain
◆It can be used as a acquisition station,finish the local data acquisition
◆Voltage, temperature and other status monitoring in station
◆Forward data and command
Working Voltage(V) 10 ~ 15, internal or external battery
Power Consumption (W) 3
Working Temperature (℃) -40~70
Storage
Temperature (℃)
– 40 ~ 85
Dimension(cm) 19X15X10
Weight 1.5 KG
Acquisition Station
(AS-101)
◆ Single box/station support 2, 4, 6, or 8 channels (optional)
◆32-bit ADC
◆Every Parameters Auto Testing
ADC Converter 32-bit ∑-△ADC
Sampling Interval 20ms,8ms,4ms,2ms
1ms,0.5ms,0.25ms
0.125ms,62.5μs,15.625μs
10μs
Preamp Gain (dB) 0, 6, 12, 18, 24, 30, 36
Synchronous
Correction Precision
<1μS
Noise 1.00 u V (Sampling interval 1 ms, front gain 0 db)
0.11 u V (Sampling interval 1 ms,front gain 36 db)
Each Channel Power Consumption(Including data transmission) Working:0.25W, standby: 0.10W
Dynamic Range > 124 dB
Channels
Inhibition
> 120 dB
Harmonic Distortion < – 112 dB
Gain Accuracy < 0.1%
Common Mode Rejection Ratio > 110 dB
Low Cut Frequency Configuration 0-10HZ
Differential Input Impedance 20KΩ/50nF
Common Mode Input Impedance 100KΩ
Full Range Input 3.75 Vpp
Stop-band Attenuation >140dB
Working Voltage(V) 10 ~ 15, internal or external battery
Working Temperature (℃) -40~70
Storage
Temperature (℃)
– 40 ~ 85
Dimension(cm) 19X15X10
Weight 1.5 KG

Master Station

The GS101 Master Station is, made from alloy magnesium and aluminum station housing. It also contains a seismic source data interface with built-in lithium battery.

Cross Station

The GS101 Cross Station is a single station with 8 channels, made from alloy magnesium and aluminum station housing.

Acquisition Station

The GS101 Acquisition Station box is a single station with 8channels, made from alloy magnesium and aluminium station housing.

Acquisition PC

Product Advantages:

1. 32-bits ADC and low noise circuit design

Now main manufacturers are all 24-bits ADC

32 bits ADC has higher conversion precision, lower noise, higher dynamic range.

2. Synchronous acquisition error less than 1μs

Now main manufacturers distributed seismograph adopt IEEE1588 technology to realize synchronization. The error is usually in a few milliseconds or a few hundred milliseconds.However, shallow seismic acquisition sampling rate is 0.5 ms – 0.25 ms, recovery technology so much larger error will cause damage on inversion of stratum structure.

GS101 adopt recovery technology and phase-locked loop technology to realize global clockdistribution and command synchronous compensation technology, which realizes the large synchronous data acquisition of geophones array. The error is less than 1μs . Thisworld’s leading technology, and 3 papers published in SCI journals.

3. Strong expandable

Easily configured to 2, 4 or 6 channels ofeach station

Convenient and flexible for 8 channels ofeach station expandable

4. Preamplifier with multiple configuration

Preamplifier level: 0 dB, 6 dB, 12 dB, 18dB, 24 dB, 36 dB.

More levels to choose and more convenientfor different geological seismic acquisition

5. Strong self-checking function

Instrument can be various parameterson-line self-checking, the internal situation is real-time online monitoring(voltage, temperature)

Self checking and monitoring can bereal-time displayed on master laptop software page.

6. Instrument overall performance meet orexceed the international advanced level

Compared with France and USA instruments, GS101 maintechnical parameters are better in the laboratory and the field contrasttesting.