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Method for removing electromagnetic interference signal by transient electromagnetic instrument in coal mine

A transient electromagnetic instrument, electromagnetic interference technology, applied in the field of geophysical exploration, can solve problems such as affecting imaging accuracy

Active Publication Date: 2015-09-23
FUZHOU HUAHONG INTELLIGENT TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the conventional method of removing electromagnetic interference signals will affect the accuracy of imaging. Therefore, research on how to remove electromagnetic interference signals, whether it is to enrich underground coal mine geophysical prospecting technology, or to promote the application of transient electromagnetic instruments in coal mines, to accurately locate the location of water, It is of great practical and theoretical significance to understand the hidden dangers of water inrush in advance, reduce or avoid the occurrence of water inrush accidents, and ensure the safety of coal mines.

Method used

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  • Method for removing electromagnetic interference signal by transient electromagnetic instrument in coal mine
  • Method for removing electromagnetic interference signal by transient electromagnetic instrument in coal mine
  • Method for removing electromagnetic interference signal by transient electromagnetic instrument in coal mine

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Embodiment Construction

[0037] The method for removing the electromagnetic interference signal by the underground transient electromagnetic instrument of the coal mine according to the present invention will be further elaborated in conjunction with the accompanying drawings.

[0038] The coal mine underground transient electromagnetic instrument adopted in the method of the present invention comprises the transmitter 19 that transmitting circuit 15 and transmitting coil 18 form, the receiver 13 that receiving circuit 9 and receiving coil 14 form, receiver 13 and transmitter 19 use cables 20 to realize synchronous control. The transmitting coil 18 and the receiving coil 14 are ungrounded loops, superimposed on the underground geological body (coal seam or surrounding rock) of the coal mine, and the transmitting coil 18 and the receiving coil 14 are respectively connected to the transmitting circuit 15 and the receiving circuit 9; the receiver 13 The processor 11 of the control circuit 12 sends an ins...

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Abstract

The invention provides a method for eliminating electromagnetic interference signals of an underground coalmine transient electromagnetic instrument. The underground coalmine transient electromagnetic instrument comprises a high-speed ARM (advanced RISC machine) processor, a large-capacity memory, a high-speed 16-bit ADC (analog to digital converter), a receiving circuit and a receiving coil, wherein a transmitter consists of a transmitting circuit and a transmitting coil; and a receiver is connected with the transmitter through a communication cable to achieve synchronous control. The method provided by the invention can be used for rapidly and accurately eliminating the electromagnetic interference to obtain the accurate observation value of a secondary filed, thereby accurately eliminating the electromagnetic interference signals.

Description

technical field [0001] The invention relates to the field of geophysical exploration, in particular to a method for removing electromagnetic interference signals by a transient electromagnetic instrument in a coal mine. Background technique [0002] Transient electromagnetic method (TEM) is a new prospecting method with broad application prospects in the field of geophysical exploration, and it has been successfully applied to engineering exploration such as coal mines, metal mines, oil, and gas exploration. [0003] Coal mine underground transient electromagnetic instrument uses an ungrounded loop (transmitting coil) to generate an excitation source, and sends a primary field to the coal mine underground geological body. Under its excitation, the coal mine underground geological body will generate a secondary field that changes with time. In the primary field During the intermittent period, the secondary field is received by the receiving circuit (receiving coil). Since th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V3/28G01V3/38
Inventor 林晓李培根许能清
Owner FUZHOU HUAHONG INTELLIGENT TECH
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