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Liquid resistivity measurement method

A measurement method and technology of liquid resistance, applied in the direction of fluid resistance measurement, etc.

Inactive Publication Date: 2020-03-31
DALIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In order to solve the problem that the existing methods for measuring resistivity are all aimed at solid resistivity, the present invention provides a method for measuring liquid resistivity

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Embodiment Construction

[0027] A method for measuring the resistivity of a liquid, which adopts an equal-distance method, that is, the electrodes are equally spaced, and the electrode constant is constant, which comprises the following steps:

[0028] S1: Assembling the test device; the test device includes a switch 1, an ammeter 2, a voltmeter 4, a fixed value resistor 3 and a container for containing the solution to be tested 5, and the switch 1, the ammeter 2, the fixed value resistor 3 and the container for containing the solution to be tested The containers of the solution 5 are connected in series, and a voltmeter 4 is connected in parallel between one end of the container containing the solution 5 to be tested and the other end of the fixed value resistor 3 .

[0029] S2: put the electrode into the solution to be tested 5, obtain the average current and the average voltage, thereby obtaining the total resistance; specifically include:

[0030] S2.1: Close switch 1, open ammeter 2, voltmeter 4,...

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Abstract

The invention discloses a liquid resistivity measurement method, and belongs to the field of liquid resistivity measurement. The method comprises the following steps: S1, assembling a test device; S2,putting the electrode into a to-be-detected solution to obtain average current and average voltage so as to obtain total resistance; and S3, solving the resistivity of the to-be-measured solution through a resistivity formula. According to the invention, the resistivity of liquids with different temperatures and different concentrations can be accurately obtained.

Description

technical field [0001] The invention relates to the field of liquid resistivity measurement, in particular to a method for measuring liquid resistivity. Background technique [0002] Resistivity is a physical quantity used to express the resistance characteristics of various substances. The ratio of the product of the resistance of an original made of a certain substance (20°C at room temperature) to the cross-sectional area of ​​the material and the length is called the resistivity of the substance; Resistivity has nothing to do with the length, cross-sectional area and other factors of the conductor. It is the electrical property of the conductor material itself, determined by the conductor material itself, and related to external factors such as temperature, pressure and magnetic field. [0003] In the case of a certain temperature, there is a formula R=ρL / S, where ρ is the resistivity, L is the length of the material, and S is the area of ​​the material; then the formula...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R27/22
CPCG01R27/22
Inventor 董桂馥李邦忠刘慧孜谢景卫
Owner DALIAN UNIV
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