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Multi-path ground natural potential continuous acquisition system

A technology of spontaneous potential and acquisition system, applied in the direction of measuring only voltage, measuring electrical variables, measuring current/voltage, etc., can solve the problem of insufficient sampling accuracy, and achieve the effect of improving accuracy and stability

Inactive Publication Date: 2020-07-03
TIANJIN UNIV MARINE TECH RES INST
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Problems solved by technology

However, the existing self-potential logging does not achieve full-time continuous acquisition, the sampling accuracy is not high enough, and the average value is used to represent the self-potential at a certain moment, which will offset a lot of useful information

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  • Multi-path ground natural potential continuous acquisition system
  • Multi-path ground natural potential continuous acquisition system

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Embodiment Construction

[0011] The present invention will be further described below in conjunction with the accompanying drawings, specific data processing examples, and best implementation modes, but the protection scope of the present invention is not limited thereto.

[0012] A multi-channel ground natural potential continuous acquisition system, the measurement steps are:

[0013] Step 1: Arrangement of electrodes. Taking the eight-way natural potential acquisition device as an example, select nine non-polarized electrodes, one of which is used as a reference electrode, and the other eight are used as acquisition electrodes. Arrange these nine electrodes at different positions, and buried in the soil;

[0014] Step 2: Connect the eight channels of signals to the acquisition circuit board through wires, connect the eight acquisition electrodes to the positive poles of the acquisition pins of the acquisition board, and then connect the negative poles of the acquisition pins of the acquisition boar...

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Abstract

A multi-path ground natural potential continuous acquisition system is mainly composed of three subsystems, namely a voltage acquisition system, an upper computer control system and a data processingsystem, and the system measures natural potentials for 24 hours. For data acquisition, 1600 points are acquired at one moment, so that the measurement accuracy and stability are improved; the time interval of 1600 points acquired each time is 1 ms, so that high-density acquisition of data is realized; through accurate control of the upper computer, the corresponding relation of the moments is accurate to seconds, and the natural potential changes can be reflected more accurately; and in the aspect of processing the natural potentials, the natural potential at the moment is calculated by adopting an algorithm of firstly taking an effective value of the data and then averaging instead of only taking an average value of 1600 pieces of data to represent the natural potential at the moment, andthe algorithm can better reflect the underlying information reflected by the natural potential.

Description

technical field [0001] The invention belongs to the technical field of special instruments for comprehensive evaluation of the relationship between formation potential and underground water layer leakage in the building foundation construction process. Many measurement systems need to know the natural potential of the formation. Background technique [0002] During the detection process, when the power supply electrode is not powered, the potential change can still be measured in the formation. This electric field is not an artificial electric field caused by artificial power supply, and is called a natural electric field. The potential generated by this natural electric field is called a natural electric field. potential. Spontaneous potential is mostly used in well logging. This method has the characteristics of simple operation and high practical value. It is one of the indispensable methods for obtaining logging parameters. However, the existing self-potential logging d...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R19/00
CPCG01R19/0084
Inventor 沈建国锡振强
Owner TIANJIN UNIV MARINE TECH RES INST
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