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Groundwater four-electrode conductivity monitoring instrument in dynamic bipolar pulse method and method

A bipolar pulse and monitoring instrument technology, applied in the direction of instruments, measuring resistance/reactance/impedance, measuring devices, etc., can solve the problems that the bipolar conductivity measurement method cannot meet the needs, achieve stable measurement, ensure accuracy, and not easily The effect of the drift of the electrode potential

Inactive Publication Date: 2018-05-22
CENT FOR HYDROGEOLOGY & ENVIRONMENTAL GEOLOGY CGS
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  • Abstract
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  • Application Information

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Problems solved by technology

[0003] The invention proposes a dynamic bipolar pulse method groundwater four-electrode conductivity monitoring instrument and method, which solves the technical problem that the two-pole conductivity measurement method in the prior art cannot meet the needs

Method used

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  • Groundwater four-electrode conductivity monitoring instrument in dynamic bipolar pulse method and method
  • Groundwater four-electrode conductivity monitoring instrument in dynamic bipolar pulse method and method
  • Groundwater four-electrode conductivity monitoring instrument in dynamic bipolar pulse method and method

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Experimental program
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Effect test

Embodiment 1

[0087] Preparation: place the detection electrode 51 in the groundwater to be tested;

[0088] Dynamic signal triggering: the controller 1 controls the internal digital-to-analog conversion module to generate a 1V positive DC voltage signal, and the forward DC signal passes through the dynamic signal generating circuit 3 to generate a dynamic bipolar excitation pulse signal with adjustable frequency and amplitude ;

[0089]Current induction: After the four-electrode conductivity electrode 5 is excited by the bipolar pulse signal, the L1 line obtains the current signal of the test circuit by measuring the voltage signal at both ends of the sampling resistor 411;

[0090] Signal conversion and transmission: the signal conditioning module converts the current signal measured in the previous step into a voltage signal and transmits the signal to the controller 1;

[0091] Signal analysis: the controller 1 analyzes the voltage signal provided by the signal conditioning module into...

Embodiment 2

[0096] Preparation: place the detection electrode 51 in the groundwater to be tested;

[0097] Dynamic signal triggering: the controller 1 controls the internal digital-to-analog conversion module to generate a 1V positive DC voltage signal, and the forward DC signal passes through the dynamic signal generating circuit 3 to generate a dynamic bipolar excitation pulse signal with adjustable frequency and amplitude ;

[0098] Current induction: After the four-electrode conductivity electrode 5 is excited by the bipolar pulse signal, the L1 line obtains the current signal of the test circuit by measuring the voltage signal at both ends of the sampling resistor 411;

[0099] Signal conversion and transmission: the signal conditioning module converts the current signal measured in the previous step into a voltage signal and transmits the signal to the controller 1;

[0100] Signal analysis: the controller 1 analyzes the voltage signal provided by the signal conditioning module int...

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Abstract

The invention belongs to the technical field of conductivity test, and provides a groundwater four-electrode conductivity monitoring instrument in a dynamic bipolar pulse method. The instrument comprises a controller; the controller is connected with a power conversion circuit, a dynamic signal generating circuit and a signal conditioning circuit; the dynamic signal generating circuit is connectedwith the signal conditioning circuit through a four-electrode conductivity electrode; the signal conditioning circuit comprises a current-to-voltage sampling circuit; and the input end of the current-to-voltage sampling circuit is connected with the four-electrode conductivity electrode, and the output end is connected with the controller. The invention also provides a groundwater four-electrodeconductivity monitoring method in a dynamic bipolar pulse method. The design is skillful, the operation is simple and convenient, and the technical problem that a two-electrode conductivity measurement method in the prior art can not meet requirements can be solved.

Description

technical field [0001] The invention belongs to the technical field of conductivity testing, and relates to a monitoring instrument and method for groundwater four-electrode conductivity using a dynamic bipolar pulse method. Background technique [0002] Conductivity is an important parameter to characterize the quality of groundwater, and it plays a very important role in groundwater quality testing. For a long time, my country has mainly used the two-electrode conductivity detection method to realize the measurement of conductivity. However, the two-pole conductivity measurement method has inherent measurement defects, mainly as follows: first, it must be measured in sections, and it is difficult to achieve a large range measurement from 0 to 100 ms / cm through a single electrode; second, it is difficult to complete the elimination of electrode poles. The measurement is easily disturbed by the electric field, which can easily affect the measurement accuracy; the third is t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R27/02
CPCG01R27/02
Inventor 赵学亮史云李康魏光华
Owner CENT FOR HYDROGEOLOGY & ENVIRONMENTAL GEOLOGY CGS
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