WGMD-10V centralized electrical system

WGMD-10V 5-channel centralized high-density electrical measurement system

The WGMD-10V 5-channel centralized high-density electrical measurement system is the most advanced multi-channel high-density electrical measurement system based on the continuous iteration and optimization of previous generations of products. It integrates Windows 10 tablet, Bluetooth, 32-bit A/D, high-power control, etc. Its main technical indicators and functions are ahead of similar instruments at home and abroad, and can work better in various areas with complex conditions.

The system uses the WGMD-10V geophysical exploration equipment as the measurement and control host. By selecting different types of electrode converters, high-density cables, and electrodes, it can realize single-channel, multi-channel 2D, 3D high-density electrical measurement, 2D high-density electrical measurement in water, and cross-hole high-density electrical measurement in wells.

Working principle

Resistivity sounding method does not take into account horizontal changes in the subsurface resistivity. While 2d electrical imaging method with the resistivity changes in vertical as well as horizontal directions along the survey line.

Typical 1D resistivity sounding surveys usually involve about 10 to 20 readings, which 2-D imaging survey can finish thousand of points with different configuration. So the working efficiency improved greatly.

Applications

● Energy resource exploration

● City geophysical exploration

● Railway and bridge prospecting

● Metal and non-metal mineral resources prospecting

● City geophysical exploration

● Hydrology and engineering geology to inspect base of dam and flood protection levee for incipientfaults

● Geothermal survey

● Landslides and other geological disaster exploration

Practical Application

● Self-potential survey

● General 1D resistivity/IP sounding(VES)

● Multi-electrode 2D resistivity imaging

● Multi-electrode 2D induced polarization (IP) imaging

● Multi-electrode 3D resistivity imaging

PS：Typical 1-D resistivity sounding surveys usually involve about 10 to 20 readings, while 2-D imaging surveys involve about 100 to 1000 measurements. In comparison, a 3-D survey might involve several thousand measurements.

Arrays

Features

● Advanced measurement and control method

All electrodes are arranged in a rolling measurement mode. By moving the electrodes, the cross section can be infinitely connected, supporting single-point re-measurement and measurement from any point.

● Parallel measurement of multiple measurement channels greatly improves work efficiency

Compared with the traditional single-channel high-density system that can only complete the measurement of one measurement point at a time. This system can complete the measurement of up to 5 measurement points at a time, which can save power and greatly improve measurement efficiency. The efficiency of this system is particularly obvious in cross-hole high-density measurement and 3D high-density measurement.

● Ultra-large power supply, ultra-wide range, ultra-high precision

The power supply capacity of 9000W (1500V×6A), the ultra-wide voltage input range of 250Vp-p, and the extremely high small signal measurement accuracy (when the voltage is as small as 0.1mV and the current is as small as 0.1mA, it can still give a measurement accuracy of ±1%), so that the instrument can be better applied to high-resistance areas and obtain deeper and better measurement results.

● Automatic compensation

Automatically compensate for natural potential, drift and electrode polarization, with a compensation range of up to ±10V.

● Overvoltage protection

Receiver: voltage channel overvoltage input protection range up to 1500V; transmitter: with overvoltage, overcurrent, AB open circuit protection and DC high voltage reverse connection protection, which can effectively prevent equipment damage caused by misoperation.

● Excellent anti-interference ability

Adopt multi-pole filtering and signal enhancement technology, integrated electrical interference suppressor function (with super anti-common mode interference and differential mode interference ability), reduce interference and improve measurement accuracy.

● Provide electrode grounding check

The grounding condition of the electrode can be checked at any time to avoid invalid measurement.

● Rich and complete high-density arrangement

Based on the traditional 18 2D high-density arrangements, a new gradient arrangement is added to ensure sufficient detection depth while obtaining better resolution; the new 3D high-density arrangement supports both Wenner and Schlumber arrangements.

● Tablet computer control improves field work efficiency

Windows 10 tablet computer realizes human-computer interface interaction, which is convenient for on-site acquisition control, acquisition parameter setting, data display and storage, various curve drawing, color high-density chromatogram drawing, etc., and supports inversion and processing of data with tablet computer on site.

● Integrated design reduces equipment use

Equipped with dual distributed high-density cable interface, cross-hole high-density measurement no longer requires transition switch controller, and the measurement process is simpler and easier.

● Built-in equipment fault diagnosis

This system comes with a diagnostic program that can quickly and accurately determine the location of the fault and the main damaged components.

Detailed description

（一）Comprehensive description

WGMD-10V geophysical exploration equipment is a 5-channel resistivity tomography equipment that can be used for 2D and 3D underground imaging. It is an efficient geophysical exploration equipment for mineral exploration and water body detection.

WGMD-10V geophysical exploration equipment has the characteristics of multiple channels and high working efficiency. It can complete the measurement of up to 5 points at a time. Compared with the traditional resistivity system, the efficiency of the new system is particularly improved in cross-hole resistivity tomography and 3D resistivity tomography.

WGMD-10V is a 5-channel measurement and control host. It can form a distributed or centralized 2D and 3D high-density electrical measurement system through the combination of different other equipment to achieve different system functions.

（二）Combination Solution

Item	Parameters
Data Collection System	WGMD-10V ( 5 Channel)
Multi-channel converter	WDZJ-60V (5 channel) WDZJ-120V (5 Channel) WDZJ-60 (Single Channel) WDZJ-120 (Single Channel)
Resistivity / IP Cable	Wide-temperature centralized high-density cable Normal temperature centralized high-density cable Marine centralized high-density cable Cross hole high-density cable
Battery	PDX-100LIII (100V,3Ah,lithium battery) PDX-200LIII (200V,3Ah,lithium battery) PDX-200LV (200V,5Ah,lithium battery) PDX-480 LⅡ (60V～480V, 2.2AH,lithium battery) PDX-1(144V,1.3Ah,Lead-acid batteries)
Electrode	Copper electrode Non-polarized electrode

• Combination 1：Centralized 2D and 3D resistivity measurement system

Equipped with WDZJ-60V5 channel 60 electrode conversion switch, WDZJ-120V5 channel 120 electrode conversion switch, centralized resistivity cable, copper electrode, to form a centralized 2D and 3D resistivity measurement system.

• Combination 2：Centralized single channel 2D resistivity measurement system

Equipped with WDZJ-60 single channel 60 electrode conversion switch, WDZJ-120 single channel 120 electrode conversion switch, centralized resistivity cable, copper electrode, to form a centralized single channel 2D resistivity measurement system.

• Combination 3：Centralized underwater 2D resistivity measurement system

Equipped with WDZJ-60V5 channel 60 electrode conversion switch, WDZJ-120V5 channel 120 electrode conversion switch, centralized Marine Cable, to form a centralized underwater 2D resistivity measurement system.

• Combination 4：Centralized well-cross-hole resistivity measurement system

Optional WDZJ-60V5 channel 60 electrode conversion switch, WDZJ-120V5 channel 120 electrode conversion switch, well-cross-hole cable, form a centralized well-cross-hole resistivity measurement system.

• Combination 5：Centralized underwater two-dimensional resistivity measurement system

Optional single channel 60 electrode conversion switch, WDZJ-120 single channel 120 electrode conversion switch, centralized Marine Cable, form a centralized underwater two-dimensional resistivity measurement system.

• Combination 6：Centralized well-cross-hole resistivity measurement system

Optional WDZJ-60 single channel 60 electrode conversion switch, WDZJ-120 single channel 120 electrode conversion switch, well-cross-hole cable, form a centralized well-cross-hole resistivity measurement system.

（三）Wirings

● 2D Resistivity Imaging

● 2D Resistivity/Induced Polarization(IP) Imaging

● 3D Resistivity Imaging

Specifications

（一）WGMD-10V geophysical exploration equipment (Test and Control Host)

Receiving section

Item	Parameters
Voltage channel	±125V (32-bit A/D), ±0.1% ±1  LSB
Input impedance	≥120MΩ
Apparent polarizability precision	±0.2%  ± 1LSB
SP compensation range	±10V
Current channel	6A (32-bit A/D), ±0.1% ±1 LSB
Suppression	50Hz power frequency interference (common mode and differential mode interference), Better than 140dB

Transmitter

Item	Parameters
Max transmitting power	9000W
Maximum supply voltage	±1500V
Max current	±6A
Power supply pulse width	1~60S, duty cycle 1:1

Other parameters

Item	Parameters
Instrument power supply	Built-in large-capacity lithium battery, can work continuously for more than 10 hours, and can also be connected to an external 12V battery.
Host interface	A, B, M, N, DC high voltage, charging and external battery, 2 distributed high-density cable interfaces, RS-232, Bluetooth.
Working temperature	-10℃~+50℃, 95%RH
Storage temperature	-20℃~+60℃
Dimension (L×W×H)	406mm×330mm×174mm
Weight	≤ 8.4Kg (WDA-2V), ≤8.75Kg (WDA-2X)
Tablet computer configuration	Windows 10 64-bit operating system, memory not less than 2GB, storage capacity not less than 64GB, Bluetooth, USB port.

（二）Optional accessories

1、WDZJ-60V Multi-channel Electrode Converter

Item	Parameters
Channels	WDZJ-60V 5-channel centralized switch
Number of conversion electrodes	60 channels/unit
Insulation performance	≥ 500MΩ
Maximum operating voltage	500VDC
Maximum operating current	3ADC
Instrument power supply	Built-in large-capacity lithium battery, can work continuously for more than 20 hours.
Working temperature	-10℃～+50℃

2、WDZJ-120V multi-channel electrode converter

Item	Parameters
Channels	WDZJ-120V 5-channel centralized conversion switch
Number of conversion electrodes	120 channels/unit
Insulation performance	≥ 500MΩ
Maximum operating voltage	500VDC
Maximum operating current	3ADC
Instrument power supply	Built-in large-capacity lithium battery

3、WDZJ-60 multi-channel electrode converter

Item	Parameters
Channels	Single-channel centralized conversion switch
Number of conversion electrodes	60 channels/unit
Insulation performance	≥ 500MΩ
Maximum operating voltage	500VDC
Maximum operating current	3ADC
Instrument power supply	Built-in large-capacity lithium battery, which can work continuously for more than 25 hours.
Working temperature	-10℃～+50℃

4、WDZJ-120 Multi-channel Electrode Converter

Item	Parameters
Channels	Single channel centralized conversion switch
Conversion electrode number	120 channels/unit
Insulation performance	≥ 500MΩ
Maximum operating voltage	500VDC
Maximum operating current	3ADC
Instrument power supply	Built-in large-capacity lithium battery, can work continuously for more than 20 hours.
Working temperature	-10℃～+50℃

5、Wide temperature centralized high-density cable

Item	Parameters
Cable	The sheath is made of wide temperature polyurethane material, with an outer diameter of Φ7mm
Number of electrode taps	30/string (each string of cables is connected to 30 electrodes)
Tap spacing	1~10 meters (specified by the user when ordering)
Cable insulation	≥ 1000MΩ/2500V between A and B power lines and between them and low-voltage lines
Working temperature	-20℃～+70℃

6、Normal temperature centralized high-density cable

Item	Parameters
Cable	Outer diameter Φ6mm
Number of electrode taps	30/string (each string of cables connects 30 electrodes)
Tap spacing	1~10 meters (specified by the user when ordering)
Working temperature	-20℃~+70℃
Cable insulation	≥ 500MΩ/500V between A and B power lines and between them and low-voltage lines

7、Underwater centralized high-density cable

Item	Parameters
Cable	The sheath is made of wide-temperature polyurethane material, with an outer diameter of Φ7mm
Number of electrode taps	30/string (each string of cables is connected to 30 electrodes)
Tap spacing	1 to 10 meters (specified by the user when ordering)
Cable insulation	≥ 1000MΩ/2500V between A and B power lines and between them and low-voltage lines
Working temperature	-20℃～+70℃
Waterproof level	Can work within a water depth of 100 meters

8、Cross-hole high-density cable

Item	Parameters
Cable	The sheath is made of wide-temperature polyurethane material, with an outer diameter of Φ7mm
Number of electrode taps	30/string (each string of cables is connected to 30 electrodes)
Tap spacing	1~10 meters (specified by the user when ordering)
Cable insulation	≥ 1000MΩ/2500V between A and B power lines and between them and low-voltage lines
Working temperature	-20℃～+70℃
Waterpro of level	100m, 200m, 300m

9、PDX-100LIII Lithium Battery Box

Item	Parameters
Output voltage	50V, 100V
Battery capacity	3Ah (288 Wh)
Charging time	3 hours
Dimensions	232mm × 192mm × 111mm
Weight	3.1Kg

10、PDX-200LIII Lithium Battery Box

Item	Parameters
Output voltage	50V, 100V, 150V, 200V
Battery capacity	3Ah (576 Wh)
Charging time	5 hours
Dimensions	270mm × 246mm × 174mm
Weight	5.1Kg

11、PDX-200LV Lithium Battery Box

Item	Parameters
Output voltage	50V, 100V, 150V, 200V
Battery capacity	5Ah (998 Wh)
Charging time	8 hours
Dimensions	270mm × 246mm × 174mm
Weight	7.9Kg

12、PDX-480 LⅡ Lithium Battery Box

Item	Parameters
Output voltage	60V～480V (60V increments)
Battery capacity	2.2AH (1056 Wh)
Charging time	8 hours
Dimensions	260mm × 170mm × 275mm
Weight	11.5Kg

13、PDX-1 Rechargeable Battery Box

Item	Parameters
Output voltage	48V, 96V, 144V
Battery type	Lead-acid battery
Battery capacity	1.3Ah
Dimensions	208 mm × 154 mm × 280mm
Weight	8.5Kg

14、Stainless Steel Electrode for 2D/3D Resistivity Imaging (Optional)

Item	Parameters
Stainless steel electrode	Φ10mm x 280mm, with stainless