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Transient electromagnetic step response acquisition method

A transient electromagnetic and step response technology, applied in the field of geophysical exploration, can solve problems such as the reduction of exploration accuracy, and achieve the effects of improving exploration accuracy, easy implementation, and simple operation

Pending Publication Date: 2022-04-15
XIAN RES INST OF CHINA COAL TECH& ENG GROUP CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Aiming at the defects and deficiencies in the prior art, the object of the present invention is to provide a method for obtaining a transient electromagnetic step response, which solves the problems in the prior art that the detection accuracy is caused by the influence of the transient electromagnetic field by the transient electromagnetic emission waveform. Reduced technical issues

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  • Transient electromagnetic step response acquisition method

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Embodiment 1

[0083] This embodiment provides a method for obtaining a transient electromagnetic step response, which specifically includes the following steps:

[0084] Step 1, launch, record and sample;

[0085] Launch and record the transient electromagnetic emission waveform to obtain the transient electromagnetic arbitrary waveform Λ, the transient electromagnetic arbitrary waveform Λ can be discretely superimposed into a plurality of pulse waveforms; the transient electromagnetic arbitrary waveform Λ includes a continuous segment transient Electromagnetic Arbitrary Waveform Λ 1 and the transient electromagnetic arbitrary waveform Λ 2 ;

[0086] Sampling the transient electromagnetic response after the continuous segment, the falling segment, and the shutdown to obtain the transient electromagnetic full waveform response P, and the transient electromagnetic full waveform response P can be discretized into a superposition of multiple impulse responses;

[0087] The recording and samp...

Embodiment 2

[0140] This embodiment provides a method for obtaining a transient electromagnetic step response, which is based on the method for obtaining a transient electromagnetic step response given in Embodiment 1. Further, the transient electromagnetic arbitrary waveform Recording and sampling of emissions, arbitrary waveforms, and full waveform responses are accomplished using transient electromagnetic processing.

[0141] Specifically, transient electromagnetic processing devices, such as Figure 5 As shown, it includes a transient electromagnetic ground transmitter 1, and the transient electromagnetic ground transmitter 1 is connected with a transmission cable 2; it also includes a transient electromagnetic ground receiver 3, a transient electromagnetic ground receiver 3 and an induced electromotive force receiving probe 4 connected;

[0142] The transient electromagnetic ground transmitter 1 is used to transmit and record the transient electromagnetic arbitrary waveform, and obta...

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Abstract

The invention provides a transient electromagnetic step response acquisition method, which comprises the following steps of: performing full-time sampling and recording on any transient electromagnetic emission waveform and response to obtain transient electromagnetic full waveform and transient electromagnetic full waveform response; discretizing the transient electromagnetic arbitrary transmitted waveform by adopting a pulse waveform, and obtaining a relational expression of transient electromagnetic arbitrary waveform response and transient electromagnetic step response after concluding and recurring a discretized result; transient electromagnetic arbitrary waveform response can be converted into step waveform response by adopting the relational expression. According to the method for acquiring the transient electromagnetic step response, the transient electromagnetic step response under an ideal condition can be acquired, so that the exploration precision is improved.

Description

technical field [0001] The invention belongs to the technical field of geophysical exploration and relates to transient electromagnetics, in particular to a method for acquiring transient electromagnetic step responses. Background technique [0002] The transient electromagnetic method is an exploration method that observes the transient electromagnetic secondary magnetic field signal during the period when the transmitting current is turned off by passing the transmitting current into the ground transmitting loop. Due to the advantages of high construction efficiency and good exploration effect, the transient electromagnetic method has been widely used by geophysicists at home and abroad in fields such as coal fields, metal mines, and geological surveys. From a theoretical analysis, in the process of using the transient electromagnetic method for exploration, the faster the emission current is turned off, the more the measured response after the shutdown is in line with the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V3/10G06F17/10
CPCG01V3/10G06F17/10
Inventor 姚伟华高小伟庞少东郭恒马炳镇王海博
Owner XIAN RES INST OF CHINA COAL TECH& ENG GROUP CORP
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