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A method and device for measuring one-dimensional distribution of conductor conductivity based on compressive sensing principle

A technology of compressive sensing and measurement method, applied in the direction of measurement device, measurement of electrical variables, measurement of resistance/reactance/impedance, etc., can solve the problem of inability to specifically measure the distribution of conductivity of solution, inability to measure the concentration and diffusion of solution, and measure the conductivity of conductors. One-dimensional distribution and other problems, to achieve the effect of fast measurement speed, shortened measurement times, and fewer times

Inactive Publication Date: 2016-08-17
HOHAI UNIV
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  • Application Information

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Problems solved by technology

[0003] Chinese patent application 201010188421.3 proposes "a graphite conductivity measurement method and measurement device". Although this solution has the advantages of simple operation, low cost and suitable for conductivity measurement of various anisotropic materials, it still has the following obvious shortcomings : One is to measure the conductivity of N points must be measured N times, the number of measurements is too many, the system measurement error is large; the other is that each measurement needs to move the micro-displacement mobile device, which not only wastes a lot of time, but also increases the conductivity of the conductor. The measurement rate is closely related to environmental factors such as temperature and humidity. Due to the long measurement time and the large interference of environmental factors between multiple measurements, the single measurement error will be significantly increased.
[0004] Chinese patent application 201210305745.X proposes a "solution conductivity measurement method and key circuit with triangular wave excitation and integral processing", although this scheme can eliminate the influence of electrode distributed capacitance, eliminate the influence of random interference on measurement accuracy and improve measurement stability However, there are still the following obvious disadvantages: First, it can only measure the overall conductivity of the solution, but cannot specifically measure the conductivity distribution of the solution; second, it cannot measure the specific diffusion of the solution concentration.
However, there is no method to measure the one-dimensional distribution of the conductivity of a conductor using the principle of compressed sensing.

Method used

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  • A method and device for measuring one-dimensional distribution of conductor conductivity based on compressive sensing principle
  • A method and device for measuring one-dimensional distribution of conductor conductivity based on compressive sensing principle
  • A method and device for measuring one-dimensional distribution of conductor conductivity based on compressive sensing principle

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Embodiment 1

[0040] Embodiment 1, with the present invention being applied to measure the conductivity one-dimensional distribution of conductive paper as an example:

[0041] Measurement purpose: To measure the one-dimensional distribution of the conductivity of the conductive paper, which can reflect the production process problems such as the uniform thickness of the conductive paper, the presence or absence of cracks and impurities.

[0042] Measuring device: The measuring device in this embodiment 1 includes an electrical impedance tester, a programmable switch electrode belt and a computer connected in sequence, wherein the electrical impedance tester adopts Hengaode / HHY8-TA produced by Beijing Hengaode Instrument Co., Ltd. -901; Programmable switch electrode belt includes 80 programmable switch electrodes, control unit and communication interface. The specific assembly is to connect 80 programmable control switch electrodes in series in the one-dimensional direction with an interval...

Embodiment 2

[0067] Embodiment 2, taking the present invention as an example for measuring the electrical conductivity distribution of cables:

[0068] Measurement purpose: To measure the distribution of the conductivity of the resistance wire, which can reflect the uniformity of the thickness of the resistance wire, the oxidation situation, and whether the conductivity of each point can reach the standard.

[0069] Measuring device: the measuring device of the present embodiment 2 includes an electrical impedance tester, a programmable switch electrode band and a computer connected in sequence, wherein the electrical impedance tester adopts a five-and-a-half-digit desktop multimeter 8840A of Fluke Company; the programmable switch electrode band includes 240 programmable switching electrodes, control unit and communication interface. The specific assembly is to connect 240 programmable control switch electrodes in series in one-dimensional direction with an interval of 1cm, control the ope...

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Abstract

The invention relates to a method and device for measuring the one-dimensional distribution of conductor conductivity based on the principle of compressed sensing. The surface closely fits; the Bernoulli random sampling matrix is ​​generated by computer, and the row vectors are sequentially taken out from the matrix; step 2 measures the resistance values ​​corresponding to different row vectors in the sampling matrix, and obtains the resistance sampling vector; step 3 according to different detection Select the sparse transformation corresponding to the conductor to form an over-complete dictionary; Step 4 uses the recovery algorithm to reconstruct the one-dimensional distribution of the resistance of the conductor to be measured, uses the resistivity calculation formula to obtain the one-dimensional distribution of the conductor resistivity, and then takes the inverse to obtain the one-dimensional conductivity of the conductor distribution results. The invention has the advantages of simple and convenient measurement process, high measurement precision and fast measurement, and is suitable for upgrading and reforming existing conductivity measuring devices.

Description

technical field [0001] The invention relates to a method for measuring the conductivity of a conductor, in particular to a method and a device for measuring the one-dimensional distribution of the conductivity of a conductor based on the principle of compressed sensing. Background technique [0002] The measurement method of conductor conductivity is widely used in various industries and fields, such as: water sample monitoring, soil analysis, material inspection, etc. With the advancement of science and technology, modern industrial and agricultural production has higher performance and technical requirements for the production process of various products, which requires strict control of various factors in the production process. The measurement method of conductor conductivity is suitable for the inspection and measurement of the uniformity of conductive paper thickness, the inspection and measurement of the vertical distribution of soil samples, the inspection and measur...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R27/02
Inventor 曹宁王伟黄峥
Owner HOHAI UNIV