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Time domain induced polarization measurement method

A measurement method and time domain technology, applied in the field of geological exploration, can solve the problems of high power and external environment requirements of construction equipment, difficult construction and other problems, improve data collection quality and anti-interference ability, reduce construction and equipment costs, Sensitive effect

Active Publication Date: 2019-01-11
湖南继善高科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the prior art, because the secondary field potential difference is low, a strong primary field potential difference is required to collect a stable secondary field potential difference, which requires high power of construction equipment and the external environment, making construction difficult

Method used

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  • Time domain induced polarization measurement method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A time-domain IP measurement method, such as figure 1 , the steps include:

[0036] (1) According to the set period, the period from t+x to t+2x is divided into several time differences (Δt), and the signal amplitude is integrated and measured to obtain several different amplitudes during the charging process. The average value of the electric field potential (Δv1), the x>0;

[0037] (2) Measure the average value of the signal for a Δt time at time t+2x as the value of the primary potential (Δv2);

[0038] (3) During the negative cycle period from t+3x to t+4x, measure the average value (Δv1') and the primary potential (Δv2') of the electric field potential in the negative cycle period according to the method of steps (1) to (2). ) value;

[0039] (4) Take the absolute value of △v1 and △v1' to average, and take the absolute value of △v2 and △v2' to average, according to the formula

[0040] △v3=△v2-△v1 (1), and

[0041] η%=△v3 / △v2*100% (2),

[0042] As can be seen...

Embodiment 2

[0046] A time-domain IP measurement method, such as figure 1 , the steps include:

[0047] (1) According to the set period, the period from t+x to t+2x is divided into several Δt, and after setting the delay of Δt1, the signal amplitude is integrated and measured, and several charging processes with different amplitudes are obtained. The average value of the electric field potential in the Δt time (Δv1), the x>0;

[0048] (2) Measure the average value of the signal for a Δt time at time t+2x as the value of the primary potential (Δv2);

[0049] (3) During the negative cycle period from t+3x to t+4x, measure the average value (Δv1') and the primary potential (Δv2') of the electric field potential in the negative cycle period according to the method of steps (1) to (2). ) value;

[0050] (4) Take the absolute value of △v1 and △v1' to average, and take the absolute value of △v2 and △v2' to average, according to the formula

[0051] △v3=△v2-△v1 (1), and

[0052] η%=△v3 / △v2*10...

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Abstract

The invention provides a time domain induced polarization measurement method, i.e., realizing the equivalent measurement of the potential difference of the secondary field by measuring the charging potential value of the primary field. The invention further provides a time domain excitation measurement device. According to the time domain induced polarization measurement method provided by the invention, the phenomenon of instability in the measurement due to the low secondary potential value is solved; the suppression to the weak electrical signal interference is significantly enhanced; the data acquisition quality, the anti-interference capability, and the sensitivity are improved; the problem that the primary field potential is too high, the corresponding transmit power and the resulting construction safety will be exponentially increasing is solved; the cost of the construction and the instrument equipment are reduced; a construction with low power and energy efficiency is realized; and the device has a better temperature and humidity stability and a dustproof and anti-seismic performance.

Description

technical field [0001] The invention belongs to the technical field of geological exploration, and in particular relates to a time domain IP measurement method. Background technique [0002] Electrical exploration is to use the differences in the electromagnetic properties and electrochemical properties of rocks and minerals in the crust, through the observation and study of the spatial distribution law and time characteristics of the electromagnetic field, to find different types of useful minerals, identify geological structures and solve geological problems. geophysical prospecting methods. Electrical exploration instruments refer to the general name of instruments used to measure the difference in electrical properties of rocks and ores in electrical exploration, referred to as electrical instruments. Electrical instruments are generally composed of two major parts: field source and receiver measurement. According to the measurement technology and working program adopt...

Claims

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Application Information

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IPC IPC(8): G01V3/38
CPCG01V3/38
Inventor 何继善尹文斌凌帆李芳书吕孝勇
Owner 湖南继善高科技有限公司
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