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A transient electromagnetic prospecting system and method based on controllable source compensation

A transient electromagnetic and compensation current technology, applied in the field of transient electromagnetic exploration systems, can solve problems such as large primary field interference

Active Publication Date: 2020-07-07
JILIN UNIV
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  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a transient electromagnetic exploration system and method based on controllable source compensation to solve the problem of excessive primary field interference

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  • A transient electromagnetic prospecting system and method based on controllable source compensation
  • A transient electromagnetic prospecting system and method based on controllable source compensation
  • A transient electromagnetic prospecting system and method based on controllable source compensation

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Embodiment Construction

[0057] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0058] see figure 1 As shown, a transient electromagnetic prospecting system based on controllable source compensation includes a transmitting device, including a transmitting controller and a transmitting coil whose excitation current is controlled by the transmitting controller; a receiving device, including a receiving controller and a transmitting coil co-centered The receiving coil; the compensation device, including a magnetic sensor and a compensation coil co-centered with the transmitting coil, and a compensation controller that receives the current of the magnetic sensor for adaptive calculation and adjusts the com...

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Abstract

The invention relates to the field of geophysical prospecting equipment, in particular to a transient electromagnetic prospecting system and method based on controllable source compensation. The transient electromagnetic prospecting system comprises a transmitting device, a receiving device, a compensating device and an industrial personal computer, wherein the transmitting device comprises a transmitting controller and a transmitting coil of which the excitation current is controlled by the transmitting controller; the receiving device comprises a receiving controller and a receiving coil which is concentric with the transmitting coil; the compensating device comprises a magnetic sensor, a compensating coil and a compensating controller, the magnetic sensor and the compensating coil are concentric with the transmitting coil, the compensating controller is used for receiving the current of the magnetic sensor to carry out self-adaptive calculation and adjusting the compensating currentin the compensating coil, and the magnetic sensor is used for detecting the magnetic field in the center of the coil and generating a feedback signal when the compensating current is regulated and controlled; the industrial personal computer is in communication connection with the receiving controller and used for displaying the working mode of the system and storing a TEM signals; and the receiving controller transmits synchronization signals, control commands and system parameters to the transmitting controller and the compensating controller. The problem that primary field interference istoo large is solved, the selection precision of the compensating current is improved, and high-precision compensation is realized.

Description

technical field [0001] The invention relates to the field of geophysical prospecting equipment, in particular to a transient electromagnetic prospecting system and method based on controllable source compensation. Background technique [0002] Transient Electromagnetic Method (TEM) is a geophysical exploration method based on the law of electromagnetic induction. Due to its sensitivity to low-resistivity bodies, it has become the preferred method for geological problems such as geological structure exploration and geological mineral exploration. . The total length of the emission line of the ground TEM is tens of meters to hundreds of meters, and the inductance of the coil cannot be ignored, which prevents the excitation current from being cut off immediately. Therefore, during this off-time, the receiving coil is coupled with the primary field signal generated by the transmitting coil in addition to the early secondary field signal. Since the early signal of TEM comes fro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V3/10
Inventor 张洋皮帅张博陈健林君
Owner JILIN UNIV
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