Variable-diameter differential eddy current sensor detection method and device
A differential eddy current and eddy current detection technology, which is applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problems of convenient operation and application, high cost, and inability to perform effective detection, and achieve detection data analysis and accurate detection data analysis Effect
Pending Publication Date: 2021-05-25
EDDYSUN (XIAMEN) ELECTRONICS CO LTD
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Problems solved by technology
[0003] However, in reality, some pipes need to be bent and expanded to a certain extent during design and installation, resulting in cross-sectional deformation
Therefore, for the internal and external through-type and differential probes (or fan-shaped probes for external detection, etc.) used in conventional eddy currents, effective detection cannot be performed at pipes with variable cross-sections.
In general, the probe (sensor) of corresponding size and specification must be replaced, which affects the convenience of operation and application in engineering
However, if an array eddy current sensor is used to make a flexible probe, the cost is high and the use is not ideal.
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[0040] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0041] Such as Figure 1a to Figure 1c The detection device of the present invention is shown in the use state diagram, a variable-diameter differential eddy current sensor detection device, used for non-destructive testing of metal pipes 1, connected to the detection instrument 12 through the lead wire 11, including three detection device structures, inserting metal Tube inspection, penetrating through metal pipe inspection and fan-wrapped metal pipe inspection.
[0042] Such as Figure 2 to Figure 5 As shown, the eddy current sensor detection device includes an elastic deformation support frame 2 and an eddy current detection coil 3, which is characterized in that the elastic deformation support frame 2 is set as an expandable and contractible cylindrical structure, and the eddy current detection coil 3 is wound on the elastic deformation su...
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The invention discloses a variable-diameter differential eddy current sensor detection method and device. The device is used for nondestructive detection of a metal pipeline (1), is connected to a detection instrument (12) through a lead (11); the device comprises elastic deformation support frame (2) and eddy current detection coils (3). The device is characterized in that the elastic deformation support frame (2) is of an expandable and contractible cylinder structure; the eddy current detection coils (3) are wound on the cylindrical outer surface of the elastic deformation support frame (2); the eddy current detection coils (3) are a pair of differential internal penetrating type eddy current sensor coils which are formed by winding elastic and stretchable flexible wires (31). The problem that metal tubes with different shapes and different diameters cannot be effectively detected at a time in eddy current detection is well solved.
Description
technical field [0001] The invention relates to the technical field of non-destructive testing, in particular to a sensor device and a detection method technology for eddy current detection of metal pipelines, in particular to a variable-diameter differential eddy current sensor detection method and a device thereof. Background technique [0002] In modern industrial production, various in-service metal pipes are used in a variety of ways. Especially for heat exchanger pipes in the fields of nuclear power, electric power, petrochemical, special equipment, etc., the safety requirements of them have received special attention. Therefore, every once in a while, or when an abnormal situation occurs, non-destructive testing must be carried out to check for potential safety hazards. For most thin-walled and non-ferrous metal tubes, the eddy current method is the best choice for detecting discontinuities. Because the eddy current method does not require couplant, and has high eff...
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IPC IPC(8): G01N27/90
CPCG01N27/9006
Inventor 林俊明戴永红吴晓瑜沈淮
Owner EDDYSUN (XIAMEN) ELECTRONICS CO LTD