GE-ANT-3C Seismic nodal instrument | Geotech Instrument Co., Ltd.

PRODUCT PARAMETERS

Light Weight:1450g
Small Volume:90mm×100mm×148mm
Water Resistant:IP68
Long Working Time:40 days(24 hours continuously working internal storage)
Built-in 4G module:Real time data transferring
Smart On/Sleep:Easy deployment
High presition clock:Timing accuracy ±10us
Concurrent reception GPS / BDS, Support multiple GNSS system

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Description

FAQ

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Description

Abstract

GE-ANT-3C is a new generation of high-precision three-component seismograph, which adopts advanced GPS/Beidou synchronization algorithm, ultra-low power circuit design and real-time data communication technology. The product has high integration, long continuous working time, no contact points, and can adapt to various complex surfaces and harsh environments. In addition, GE-ANT-3C uses the most advanced analog-to-digital conversion design, and the dynamic range of the product far exceeds similar products, which can monitor smaller vibration signals.

Applications

● Seismic regional safety evaluation

● Shallow geological survey

● Urban underground space exploration

● Geothermal exploration

● Coal goaf exploration

● Mineral/ natural gas exploration

Features

Specifications

（一）Physical Parameter

Item	Parameters
Weight	1450g
Size	90mm×100mm×128mm(Without Spike)
Working Temperature	-40℃ to +70℃
Waterproof	IP68
Working Time @ 25 ℃	40 days(24 hours continuously working internal storage) 7 days(8 hours real time data transferring)
Charging Time	9 hours

（二）Instrument Parameter

Item	Parameters
Number of Channels	3
ADC	32 bit
Sampling Rate	0.25ms,0.5ms,1ms,2ms,4ms,8ms,10ms,20ms
Preamplififier Gain	0-36dB(6dB steps)
Low Cut Filter	1Hz,DC removed or turn off
Anti Aliasing Filter	206.5Hz@2ms(82.6% Nyquist frequency) optional maximum phase or minimum phase
0dB @ Max Input	2.5VpeaK
Equivalent Input Noise @ 12dB	0.5uV@0.25ms / 0.2uV@2ms / 0.14uV@4ms
Instantaneous Dynamic Range @ 12dB	118.9dB@0.25ms / 126.8dB@2ms / 130dB @4ms
Total Dynamic Range	150dB
Timing Standard	<1ppm
Time Accuracy	±10μs
Internal Storage	Extended from 32GB to 128GB
Built in GPS	GPS, BDS, GLONASS,GNSS(Concurrent reception) are used for timing and positioning

（三）Geophone Parameter

Item	Parameters-1	Parameters-2
Optional Geophone	5Hz	2Hz
Natural Frequency（Hz）	5±7.5%	2±15%
DC Resistance（Ω）	1850±5%	6400±10%
Sensitivity（V/m/s)	80±5％	260±15%
Damping	0.7±7.5％	0.7±15%
Distortion	≦0.2%	≦3%
Aliasing（Hz）	≧120	≧90

Software System

（一）Data-Harvest & Charging Center

（二）Ant-Data Manager

（三）Ant Map

（四）Ant View

（五）Ant Deploy

Auxiliary Equipment

FAQ

In gravity exploration (SI), what is the unit of gravity? How to convert gravity units between SI and CGS?

What are gravitational field and gravitational potential?

What is the normal gravity field of the earth? What are the rules for the change of the normal gravity field with latitude and altitude?

① The normal gravity field of the earth: Assuming that the earth is a rotating ellipsoid (reference plane), the surface is glossy, the internal density is uniform, or it is distributed in concentric layers, the density of each layer is uniform, and the deviation of the shape of the ellipsoid from the geoid is very small, then the gravity field generated by the earth is the normal gravity field.
② The normal gravity value is only related to the latitude, the smallest at the equator and the largest at the poles, with a difference of about 50,000 g.u.; the rate of change of the normal gravity value with latitude is the largest at 45° latitude, and zero at the equator and the poles; the normal gravity value decreases with increasing altitude, and its rate of change is -3.086 g.u.. The main feature of the long-term change is the "westward drift" of the geomagnetic elements, both the dipole field and the non-dipole field drift westward, and have a global nature.

What is the relationship between gravitational field strength and gravitational acceleration?

What is gravity exploration?