FCTEM40-2High Resolution Transient Electromagnetic System

Product introduction

The transient electromagnetic method uses the ungrounded loop to send a pulsed magnetic field to the ground, and uses the receiving coil to receive the secondary magnetic field generated by the underground induced eddy current to detect the resistivity of the geological body. FCTEM40-2 high-resolution transient electromagnetic system is a portable transient electromagnetic detection system developed for shallow and high-resolution detection scenarios. The system integrates the main engine and battery (weight 7kg), and the integrated coil of transmission and reception (70cm diameter coil weight 15kg) is carried by folding portable trolley, which is light and easy to operate, and two people can complete the construction. It is suitable for urban underground space investigation, road disease detection, tunnel advanced geological forecasting, karst and groundwater detection, dam leakage detection, goaf area, fault, superficial stratum layer detection, pipeline detection, pipeline corrosion detection, unknown buried object investigation, archaeology, etc.

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· Enhance shallow detection capabilities: realize basically no blind area detection in ultra-shallow layers;
· High resolution: vertical resolution and lateral resolution are extremely high;
· Strong anti-interference: through high current pressure noise, the use of shielded coil is suitable for strong interference areas such as cities and high-voltage lines;
· Stable coil structure: no on-site adjustment, good seismic resistance;
· Data processing: Adopted the Alpha supercomputing inversion cloud platform, which has the characteristics of semi-automatic geological model generation, streamlined and easy adjustment of parameters, clear stratification of production status, easy to judge abnormal focus, extremely fast inversion speed, and convenient upgrade and maintenance.
· It has a joint inversion data interface with the TETSP tunnel seismic advance prediction system;
· Lightweight: coil trailer trolley, host battery integration and only two people can construct.

· A/D: 24 bits;
· Real-time dynamic range: 150dB;
· Data acquisition mode: spot measurement mode;
· Sample rate: 1.25 or 2.5MHz;
· Sampling interval: 800 or 400ns;
· Host: transmitter system and battery integrated host;
· Acquisition terminal communication mode: USB3.0;
· Power supply mode: lithium battery power supply;
· Transmit current: 40A;
· Transmission frequency: 50, 25, 12.5, 6.25, 3.125, 0.78125, 0.390625Hz (optional);
· Turn-off time: less than 40μs (coil 0.7m diameter);
· Standard coil: 0.7m shielded coil;
· Detection depth: 100 meters;
· Working temperature: -30°C60°C, maximum relative humidity of 95%;
· Host and coil: single cable connection;
· Data processing: Alpha quasi-two-dimensional supercomputing fast inversion system;

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