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Method for correcting diurnal variation of natural electric field

A technology of natural electric field and correction method, which is applied in electric/magnetic exploration, radio wave measurement system, sound wave re-radiation, etc. It can solve the problems of poor exploration effect and low comparability of natural electric field signals

Inactive Publication Date: 2019-07-16
CENT SOUTH UNIV
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Problems solved by technology

[0005] The purpose of the present invention is to propose a natural electric field daily variation correction method based on the problems of low comparability of natural electric field signals at different times and poor exploration effect in the existing frequency selection method, which can reduce the natural electric field at different times and different frequencies. The influence of the excitation source signal and the change of human electric field, so as to improve the exploration accuracy and effect of natural electric field

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  • Method for correcting diurnal variation of natural electric field
  • Method for correcting diurnal variation of natural electric field
  • Method for correcting diurnal variation of natural electric field

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Embodiment Construction

[0019] Refer to the following figure 1 , figure 2 , image 3 The present invention will be further described in combination with specific embodiments.

[0020] like image 3 As shown, it is necessary to image 3 The 36 measuring points in the exploration area adopt the new method of daily variation correction proposed by the present invention to carry out natural electric field exploration, and its specific steps are as follows:

[0021] 1) Select two electrical equipments for measuring natural electric field, first conduct the consistency test of the two electrical equipments, control the systematic difference of the two instruments within the error range or obtain the systematic difference of the two instruments, and use one of the electrical equipments The instrument is used as a reference, and the measurement results of another instrument are systematically corrected.

[0022] 2) In the exploration area, select a known point O where the geological conditions are basi...

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Abstract

The invention provides a method for correcting diurnal variation of a natural electric field. As for the method, natural electric field measuring equipment is adopted to collect natural electric fieldsignals of a known geological point at a certain time interval, according to the natural electric field acquisition time, frequency and other parameters, a formula is adopted to correct natural electric field data of other measuring points, wherein the formula is F<n>(f)=(U<n>(T<n>,f)-U<0>(T<n>,f)*L<0> / U<0>(T<n>,f) / L<n>, thus the random change and interference of the natural electric field signals are eliminated, the geological conditions of the measuring area is more truly reflected, the quality of the natural electric field data in the whole measuring area is improved, and the exploration effect is improved.

Description

technical field [0001] The invention relates to a natural electric field diurnal variation correction method for improving the natural electric field exploration effect in the field of exploration geophysics. Background technique [0002] In electrical prospecting, there is a frequency selection method that uses the measurement of natural electric field for geological prospecting. This method uses two grounded measuring electrodes to directly measure the electric field signal strength of different frequencies of the natural electric field of the earth, without measuring the natural magnetic field of the earth, and without arranging artificial electric fields, so the method has high work efficiency, low exploration cost, and Humanistic electromagnetic interference ability is strong, which has obvious advantages in geological exploration. However, since the excitation source that forms the natural electric field signal of the earth is not stable, not only the signal strength ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V3/08
CPCG01V3/088
Inventor 刘春明程云涛郭振威袁昀希胡隆运
Owner CENT SOUTH UNIV
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