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Multi-direction current collecting system applied to electric field fingerprint technique

An electric field fingerprint and collection system technology, which is applied in material analysis, measurement devices, instruments, etc. by electromagnetic means, can solve the problem of uneven distribution of electric field lines, and achieve the effect of improving safety and accurate detection results.

Active Publication Date: 2016-03-02
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is: to overcome the deficiencies of the prior art, to provide a method that can realize voltage collection in all directions of the capture electrodes in the voltage collection area on the pipeline to be measured, so that the voltage in all directions in the pipeline can be accurately detected. At the same time, it overcomes the defect of uneven distribution of electric field lines when the two-point current is fed in, so that the detection accuracy is higher and it is applied to the multi-directional current acquisition system of the electric field fingerprint method.

Method used

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  • Multi-direction current collecting system applied to electric field fingerprint technique
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  • Multi-direction current collecting system applied to electric field fingerprint technique

Examples

Experimental program
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Embodiment 1

[0037] Such as figure 1 As shown, a multi-directional current collection system applied to the electric field fingerprint method includes a pipeline to be tested 1, a voltage collection area 2 is set on the outer surface of the corrosion-prone part of the pipeline to be tested 1, and a current collection area 2 is set in the current collection area 2 Acquisition array 3.

[0038] Such as figure 2 As shown, the acquisition array 3 is radial, including the current feed point 4 located at the center of the acquisition array 3, with the current feed point 4 as the center of a circle, there are multiple circles, and the radii of all the circles are from the inside to the outside with equal difference mode settings. The same number of capture electrodes 5 are evenly distributed on each circumference, and the corresponding capture electrodes 5 on each circumference are located on the same collection ray starting from the current feeding point 4, and the outer end of each collecti...

Embodiment 2

[0047] The difference between embodiment 2 and embodiment 1 is: the acquisition array 3 in embodiment 2 does not adopt the regular radial pattern in embodiment 1, but adopts an irregular radial design, such as the direction of each acquisition ray is set arbitrarily, At the same time, the number and / or spacing of the capture electrodes 5 on each collection ray can be set arbitrarily.

[0048] At the same time, since the setting direction of each collection ray and the setting number of capture electrodes 5 in it can be set arbitrarily, the tester can set some directions individually according to needs, and focus on detection, and the setting method is more flexible and reliable.

Embodiment 3

[0050] Such as Figure 4 As shown, in the multi-directional current collection system applied to the electric field fingerprint method in this embodiment, the pipeline to be tested is included 1, and a voltage collection area 2 is arranged on the outer surface of the corrosion-prone part of the pipeline to be tested 1, and in the current collection area 2 is provided with an acquisition matrix 9 .

[0051] In this field, a matrix means a rectangular array formed by several rows and columns of capturing electrodes 5 . In this embodiment, the acquisition matrix 9 adopts a composite matrix composed of two sets of matrices, and adopts a square design. The composite acquisition matrix 9 includes an m*m square matrix in the outer circle, where m is the number of first capture electrodes 501 (indicated by white circles in the figure), and m is a natural number not less than 3. In a matrix composed of m*m first capture electrodes 501, a second capture electrode 502 (represented by I...

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Abstract

The invention discloses a multi-direction current collecting system applied to the electric field fingerprint technique, and belongs to the field of pipeline corrosion detection technical equipment. The multi-direction current collecting system comprises a voltage collecting array which is composed of a plurality of capture electrodes (5). The multi-direction current collecting system is characterized in that the voltage collecting array is a composite array which is composed of a plurality of collecting sub arrays; each collecting sub array and the axial direction of a to-be-detected pipeline (1) form different included angles; the two ends of each collecting sub array are provided with a current input mechanism and a current output mechanism enabling a parallel electric field to be formed in the corresponding collecting sub array, and the current directions of the parallel electric fields formed by any two sets of the current input mechanisms and the current output mechanisms are different from each other. By the adoption of the system, voltages can be collected in all directions of the capture electrodes in a voltage collecting area on the to-be-detected pipeline, and thus the loss conditions inside the pipeline in various directions can be detected accurately; meanwhile, the defect that electric field lines cannot be evenly distributed in the two-point type current feed-in process is overcome, and therefore the detecting precision is higher.

Description

technical field [0001] The invention relates to a multi-directional current acquisition system applied to the electric field fingerprint method, which belongs to the field of pipeline corrosion detection technology equipment. Background technique [0002] At present, the resistance probe method and polarization probe method are widely used to monitor the corrosion of pipelines online, but these methods can only detect indirect uniform corrosion, and have damage to the pipe wall. It can't do anything about the extremely harmful localized corrosion. Using the electric field fingerprint method to detect pipeline corrosion has the advantages of direct measurement, high accuracy and reliability, strong adaptability, and no damage to the pipeline wall. [0003] The basic principle of the electric field fingerprinting method is as follows: set up a voltage collection area at the corrosion-prone part of the pipeline to be tested, weld several capture electrodes in the form of an ar...

Claims

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Application Information

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IPC IPC(8): G01N27/61
CPCG01N27/61
Inventor 张兰王宜金蒋文春陈健飞樊户伟刘文彬徐书根戴洪飞涂善东
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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