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Transient electromagnetic splay transmitting and receiving coil

A technology of transmitting and receiving, transient electromagnetic, applied in the direction of coil, coil manufacturing, electric/magnetic exploration, etc., can solve the problems of not achieving practical effect, not meeting data requirements, and limited effect

Inactive Publication Date: 2010-10-06
CHINA RAILWAY SIYUAN SURVEY & DESIGN GRP
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Problems solved by technology

[0005] At present, these methods use signal processing to develop interference and have achieved certain results. However, due to the limitations of digital signal processing itself, each method has its own specificity in suppressing external interference. A large number of actual measurement data show that, When the external interference is large and there is a certain pattern of interference (such as in industrial areas, urban areas, near power lines and signal lines), using the above method to suppress external interference still has limited effect, cannot meet the data requirements, and often fails to achieve practical results

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  • Transient electromagnetic splay transmitting and receiving coil
  • Transient electromagnetic splay transmitting and receiving coil
  • Transient electromagnetic splay transmitting and receiving coil

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Embodiment Construction

[0026] In this embodiment, on the basis of the conventional rectangular transmitting and receiving coils, the transmitting coil 1 and the receiving coil 2 are respectively twisted 180 degrees from the middle, and transformed into two 8-shaped coils, and the two sub-coils of each 8-shaped coil have the same area , there are two types of specific designs: overlapping loop 8-shaped coil and center loop 8-shaped coil, see Image 6 , Figure 7 .

[0027] Figure 8 and Figure 9 show the comparative measurement results of the traditional overlapped loop rectangular wireframe and the overlapped loop 8-shaped wireframe at the same place where there is a high-voltage line near the measuring point (both measurement effective areas are equal):

[0028] It can be seen from Fig. 8 and Fig. 9 that the data collected by the conventional rectangular coil (b in the figure) has obvious distortion, which is caused by the external interference electromagnetic field, and the data collected by the 8...

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Abstract

The invention relates to a transient electromagnetic splay transmitting and receiving coil, which is characterized in that on the basis of conventional independent frame-shaped transmitting and receiving coils, the transmitting coil and the receiving coil are respectively twisted for 180 degrees from middle parts and then are transformed into two splay coils. The invention achieves the purpose of eliminating external interference of electromagnetic waves in the early process of signal acquisition by geometrical splay transmitting and receiving coils. The coil eliminates the interference of electromagnetic waves and simultaneously ensures that self-excited electromagnetic waves can be effectively received; and the coil is relatively convenient in use and is suitable for practical work of a transient electromagnetic method.

Description

technical field [0001] The invention relates to a transmitting and receiving coil, in particular to a transient electromagnetic 8-shaped transmitting and receiving coil. The coil is an important part of the transient electromagnetic equipment. The transmitting coil completes the excitation of the electromagnetic field, and the receiving coil completes the reception of the induced electromagnetic field. Background technique [0002] Transient Electromagnetic Methods (TEM for short) belongs to a geophysical prospecting method. This method uses an ungrounded return line or a grounded line source to transmit a pulsed magnetic field underground. During the interval of a pulsed magnetic field, the coil Or the method of observing the secondary eddy current field with the ground electrode. It is mainly used in engineering geological exploration, metal mineral exploration, coal mine exploration and other fields. [0003] At present, the transient electromagnetic antenna coils all a...

Claims

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Application Information

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IPC IPC(8): H01F5/00H01F41/04G01V3/10
Inventor 刘铁林昀卿志朱正国曹哲明周柏林刘建学
Owner CHINA RAILWAY SIYUAN SURVEY & DESIGN GRP
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