Double-coil coupled multi-wave survey system

A coupled, double-coil technology, applied in the field of transient electromagnetic detection, can solve the problems of not being able to take into account both the shallow detection information and the deep detection information, the power reduction of the power supply system, the loss of the shallow detection information, etc., to improve the shallow detection information. Detection effect, reducing interference, eliminating the effect of multiple magnetic field aliasing
CN107065020BActive Publication Date: 2019-09-06CHONGQING CUILU DETECTION TECH CO LTD +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHONGQING CUILU DETECTION TECH CO LTD
Publication Date
2019-09-06

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Abstract

A dual-coil coupled multi-wave exploration system, comprising a transmission control system. A first set of pulse signal output ends of the transmission control system is connected with a master transmitting coil, and a second set of pulse signal output ends of the transmission control system is connected with a slave transmitting coil. The master transmitting coil and the slave transmitting coil are coupled coils and are overlapped in position. A receiving coil module is provided at the edge of the master transmitting coil, and is partially intersected with the master transmitting coil; and the partial orthographic projection of the master transmitting coil is coincide with the partial orthographic projection of the receiving coil module. The dual-coil coupled multi-wave exploration system can realize alternate detection of the deep part and the shallow part, is short in the current turn-off time for the shallow detection, low in loss, high in detection precision and work efficiency, simple in structure and high in mobility; the master transmitting coil and the receiving coil module are intersected partially and thus the mutual inductance influences between the master transmitting coil and the receiving coil are cancelled, so that the exploration precision is improved.
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Description

technical field

[0001] The invention relates to the technical field of transient electromagnetic detection, in particular to a double-coil coupled multi-wave survey system. Background technique

[0002] Transient electromagnetic method is also called time domain electromagnetic method (TEM), which uses ungrounded return line or grounding line source to transmit a pulsed magnetic field to the ground. The method of observing the secondary eddy current field. Simply put, the basic principle of the transient electromagnetic method is the law of electromagnetic induction. The decay process is generally divided into early, middle and late stages. The early electromagnetic field is equivalent to the high-frequency component in the frequency domain, with fast attenuation and small skin depth; while the late component is equivalent to the low-frequency component in the frequency domain, with slow attenuation and large skin depth. The geoelectric characteristics at different depths...

Claims

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