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High precision measuring method for deep resource based on natural electric field idealization and detecting instrument

A technology of natural electric field and measurement method, applied in the field of deep resource measurement, can solve problems such as difficult geological effects, lack of observation accuracy, poor observation accuracy, etc., to reduce physical labor, improve observation efficiency and automation, and overcome low observation accuracy. Effect

Inactive Publication Date: 2007-04-11
张东来 +4
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Problems solved by technology

The existing natural electric field method lacks an effective method to improve the observation accuracy, so the observation accuracy is not good, and the due geological effect is rare

Method used

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  • High precision measuring method for deep resource based on natural electric field idealization and detecting instrument
  • High precision measuring method for deep resource based on natural electric field idealization and detecting instrument
  • High precision measuring method for deep resource based on natural electric field idealization and detecting instrument

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Embodiment Construction

[0029] The embodiment of the high-precision measurement method for deep resources based on the idealization of natural electric field of the present invention includes the following steps:

[0030] 1) In the section where the mineral-free geological information is close to zero, set a fixed reference base point 0, place the two copper sulfate electrodes of the voltage detector on both sides of the reference base point at an interval of 30 meters, and set the potential difference to ΔV0;

[0031] 2) Set the measured point as i (the distribution of the measured points should be determined according to the actual measurement requirements), place the two copper sulfate electrodes of the voltage detector on both sides of the reference base point at an interval of 30 meters, and set the potential difference as ΔVi;

[0032] 3) Simultaneously measure the fixed reference point and the measured point within the t0-tx time period of 5 minutes to obtain the discrete sequence of ΔV0 and Δ...

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Abstract

The invention is about a method for idealistically measuring the deep source with a high precision based on the natural electric field and its device. It processes the digital signal by using DSP and FPGA based on the existing measuring principle of the natural electric field, and it adopts GPS device for synchronized measurements and digital integration and effective use of natural and artificial electric interference to achieve the idealized natural electric field measurement. There are four channels on the detector which can be connected to four pairs of electrodes, so the speed of measurement is increased. The hardware of the system consists of a simulation unit, an A / D conversion unit and a digital unit,in which, the simulation unit is mainly used to amply the input signal and filter the frequency interference, and the A / D conversion unit is used to convert the analog signals into digital signals by using the converter of 24-bit delta-Sigma A / Dconverter, and digital unit is used to process the converted signals including the digital signal filtering, power spectrum calculation and memory function.

Description

technical field [0001] The invention relates to a deep resource measurement method, in particular to a high-precision deep resource measurement method based on natural electric field idealization. The invention also relates to a measuring device for carrying out the method. Background technique [0002] The natural electric field mainly comes from the earth stray current induced by global lightning and other electromagnetic processes. It has a wide spectrum, rich energy, and spreads all over the world. For geophysical exploration, it has many advantages such as large depth, light equipment, suitable for seismic monitoring, etc., attracting long-term exploration of the geophysical community. The natural low-frequency electric field method uses the lightning field and stray current field as field sources. Based on the difference in resistivity of rock ore, the change of the horizontal component of the earth's electric field is measured along a certain section on the ground ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V3/00G01V3/08G01C7/00G01C7/02
Inventor 张东来常春陈连武王超秦海亮
Owner 张东来
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