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Carrier transient electromagnetic system and test method thereof

A technology of transient electromagnetics and testing methods, applied in the field of transient electromagnetics, can solve problems such as detection blind spots, inability to accurately reflect the electrical characteristics of the medium, and insufficient shallow detection capabilities, and achieve the effect of reducing signal strength and eliminating interference

Inactive Publication Date: 2021-07-23
ANHUI UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, this method observes the signal of the secondary field after the emission current is turned off (attenuation section) to obtain the electrical characteristics of the underground medium, but the secondary field of the attenuation section cannot accurately reflect the electrical characteristics of the medium due to the distortion of the early data caused by the interference of the primary field , resulting in a detection blind spot
Although the existing transient electromagnetic technology has made a lot of improvements in terms of emission current shutdown and coil devices, the problem of blind spots has not been completely solved, and the actual shallow detection capability is still insufficient.

Method used

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  • Carrier transient electromagnetic system and test method thereof
  • Carrier transient electromagnetic system and test method thereof
  • Carrier transient electromagnetic system and test method thereof

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Embodiment Construction

[0027] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings.

[0028] like figure 1 , 2 As shown, a carrier transient electromagnetic system includes a support 1 , a transmitting coil 2 , a receiving coil 4 , a host 3 , a connecting wire 5 , and a mobile terminal 8 . The support 1 includes a box body 11 , a connecting rod 12 , a main frame 13 , rollers 7 and distance measuring wheels 6 . The box body 11 is made of insulating plastic material, which is used to fix the transmitting coil 2 and the receiving coil 4 and install rollers 7 on both sides; the connecting rod 12 is used to install the connecting wire 5 and fix the main frame 13 and the box body 11; the main frame 13 is used for The host machine 3 is fixed and a distance-measuring wheel 6 and a roller 7 are respectively installed on both sides; the distance-measuring wheel 6 measures and records the moving distance; the box body 11,...

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Abstract

The invention discloses a carrier transient electromagnetic system and a test method thereof, and belongs to the field of coal mining, and the carrier transient electromagnetic system comprises a supporting member, a transmitting coil, a receiving coil, a host, a connecting line and a mobile terminal. Through the reasonable arrangement of the transmitting coil and the receiving coil, the amplitude of a primary field of a carrier band is greatly reduced, the primary field keeps a constant by transmitting linear turn-off current, and the interference of the primary field of the carrier band is thoroughly eliminated, so that a pure secondary field signal of the carrier band is obtained, the fine detection of the shallow geological geoelectric information is achieved through calculation of the apparent resistivity and imaging, and a problem that a conventional transient electromagnetic method has an exploration blind area is solved.

Description

technical field [0001] The invention relates to the field of transient electromagnetics, in particular to a carrier transient electromagnetic system and a testing method thereof. Background technique [0002] As an important geophysical prospecting method, transient electromagnetic has significant advantages in the detection of underground media. At present, this method observes the signal of the secondary field after the emission current is turned off (attenuation section) to obtain the electrical characteristics of the underground medium, but the secondary field of the attenuation section cannot accurately reflect the electrical characteristics of the medium due to the distortion of the early data caused by the interference of the primary field , resulting in a detection blind spot. Although the existing transient electromagnetic technology has made a lot of improvements in terms of emission current shutdown and coil devices, the problem of blind spots has not been comple...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V3/10
CPCG01V3/10
Inventor 胡雄武陈人峻孔冰清徐标
Owner ANHUI UNIV OF SCI & TECH
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