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Electric prospecting method and device

A technology of electrical prospecting and measuring devices, which is applied in the field of electrical prospecting and can solve problems such as low production efficiency

Inactive Publication Date: 2012-04-25
CHINA UNIV OF GEOSCIENCES (BEIJING)
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  • Summary
  • Abstract
  • Description
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Problems solved by technology

[0009] This method can provide relatively rich IP information, but it needs to be observed at many frequencies to obtain a relatively complete spectrum, so the production efficiency is low

Method used

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  • Electric prospecting method and device
  • Electric prospecting method and device

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Experimental program
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Embodiment Construction

[0060] figure 2 The identification model of the electrical prospecting method according to the invention is shown. Its basic principle is the Wiener-Hoff equation. Its core is to use pseudo-random sequences (including m-sequences and reverse-repeated m-sequences) to correlate the received time series to obtain an impulse response, and transforming the impulse response into the frequency domain is the frequency response.

[0061] The system input is v(t), the output u(t) is the measured signal, h(t) is the impulse response of the system to be identified, r(t) is the response of the input v(t) after passing through the system under test , external random noise interference n(t), where the input v(t) and output u(t) are known, and the interference n(t) is unmeasurable and unknown.

[0062] The system input and output signals v(t), u(t) have the following relationship:

[0063] u(t)=r(t)+n(t)=v(t)*h(t)+n(t) (1)

[0064] Where h(t) is the time-domain impulse response of the sy...

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Abstract

The invention relates to an electric prospecting method. In the method, a transmitter transmits a signal and a receiver processes the received signal to obtain impulse response and frequency response. The electric prospecting method is characterized by comprising the following steps of: transmitting a pseudo random sequence by using the transmitter; carrying out correlation operation on a time sequence received by the receiver by using the pseudo random sequence so as to obtain time domain impulse response; converting the time domain impulse response to frequency domain so as to obtain frequency response; and carrying out fitting and inversion by using a double Cole-Cole model so as to obtain parameters of a complex resistivity method.

Description

technical field [0001] The invention relates to the field of electrical prospecting, in particular to an electrical prospecting method and device. Background technique [0002] Electrical prospecting (especially IP method) is widely used in the search for metal minerals, but due to the existence of a large number of high-voltage transmission lines and various electrical facilities in and around the production mine, this will generate extremely strong electromagnetic interference signals; A large number of metal pipes, vehicle tracks and waste rocks in the underground mining tunnels have caused great difficulties in the power supply and electric field reception of the electric method. All of these have affected the application effect of the electrical prospecting method, so there is a serious noise interference problem when the electrical prospecting method solves the crisis mine problem. [0003] Although the electromagnetic interference near production mines is very large,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V3/00G01V3/38
Inventor 李梅魏文博顾强罗维斌刘景贤
Owner CHINA UNIV OF GEOSCIENCES (BEIJING)
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