DKTEM-28 High Power Transient Electromagnetic Instrument

Sending current intensity: 100A
Current pulse width: 1ms, 2 ms, 3 ms, 4 ms, 5 ms
Current emission frequency: 256Hz, 75Hz, 62.5Hz, 12.5Hz, 6.25Hz, 1.5625Hz, lower; non-modulated single rectangular pulse output, frequency error ±2%
Coil specifications: 1m*1m–5m*5m (customizable by users)
Power supply output voltage: 16.8±0.2V
Number of superpositions: unlimited, optional;
Turn-off time: 0.1-20uS (related to coil inductance)
Transmitted waveform: Bipolar rectangular wave
Main control machine: Military-grade low-power embedded system
Number of channels: Up to 1024 channels (the number of channels can be set arbitrarily)
A/D converter: 24-bit
Minimum sampling interval: 1μS
Dynamic range: 140 dB
Noise floor: 0.1uV
Port: USB2.0
RAM: 2GB
Data storage: 16GB
Display: TFT10.4 inch (1024*800) 32-bit true color screen, LED backlight
Hardware platform: Embedded ARM processor Cortex-A8
Touch screen: 10.4-inch high-precision touch screen
Interpretation software: intelligent data processing and interpretation, one-key automatic mapping system, capable of matching and realizing 3D imaging display technology
Power supply: built-in high-performance rechargeable battery
Continuous working time: more than 10 hours
Host size: 406x330x174 (mm) (length x width x height)
Host weight: about 3.5Kg
Operating temperature: -20℃～+40℃

Main advantages and features:
1. High power: The industry’s highest power transient electromagnetic instrument, with an emission current of more than 100A, fundamentally improves the depth and accuracy of detection.
2. Small blind area: The transmitting coil has small self-inductance, fast shut-off time, low interference to the secondary field, and a small, shallow blind area.
3. Anti-interference: The advanced “8”-shaped coil construction method is adopted to ensure accurate detection capability; the secondary field is enhanced by increasing the transmission power, the signal-to-noise ratio is improved, and thus the exploration depth is increased; the signal-to-noise ratio is improved by repeated measurement superposition of multiple pulse excitation secondary fields and multiple coverage technology in the spatial domain, and the lateral and longitudinal resolutions are further improved. It can be applied to the advanced detection of tunnels and mines, which require complex work and are subject to large noise interference, as well as to tunnel tops and floors.
4. Optimized hardware configuration: integrated transmitter-receiver host design, integrated passive transmitter-receiver coil, small size, light weight, compact structure, lightweight system configuration, suitable for on-site transportation and convenient use; high-precision touch screen, more user-friendly and convenient operation; advanced low-power embedded operating system, more stable use; automatic data storage, no manual operation required.
5. Intelligent internal system: The equipment is equipped with an intelligent internal interpretation and a one-key automatic drawing system;
6. 3D imaging display: Support industry-leading 3D imaging of detection results and 3D slice display and analysis technology.

Applications:
1. Tunnel advanced detection, effective advanced detection distance can reach more than 150 meters;
2. Exploration of geological structures around tunnels and roadways, detecting the structural distribution of mining areas from the ground down to the ground, and structural water content;
3. Exploration of hidden water conductive structures during tunneling;
4. Detect the buried depth and ore accumulation structure of good conductive ore bodies, other engineering exploration, and environmental exploration;
5. Detection of underground vein trend in metal mines;
6. Structural detection and metal pipeline detection around underground caverns;
7. Investigation of water inrush water source and collapsed columns in goafs and abandoned small coal kilns.