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High-sensitivity flexible eddy current array sensor and monitoring method thereof

An array sensor and high-sensitivity technology, applied in instruments, measuring devices, scientific instruments, etc., can solve problems such as service environment interference, low sensor sensitivity, and vulnerability to environmental changes, and achieve enhanced engineering application value and high crack monitoring sensitivity , Inhibit the effect of ambient temperature and stress interference

Inactive Publication Date: 2018-12-18
AIR FORCE UNIV PLA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problem that the existing eddy current sensors are easily disturbed by the service environment during use, a high-sensitivity flexible eddy current array sensor with anti-interference ability is provided to solve the problems of low sensitivity and vulnerability to environmental changes of the existing sensors

Method used

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  • High-sensitivity flexible eddy current array sensor and monitoring method thereof
  • High-sensitivity flexible eddy current array sensor and monitoring method thereof
  • High-sensitivity flexible eddy current array sensor and monitoring method thereof

Examples

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specific Embodiment 1

[0043] Such as Figure 1-5 As shown, a high-sensitivity flexible eddy current array sensor includes a sensor body and a connecting part 15, and the connecting part 15 is located on one side of the sensor body;

[0044] From top to bottom, the sensor body is the first protective film layer 8, the first coil layer 9, the flexible base layer 10, the second coil layer 11 and the second protective film layer 12;

[0045] The main body of the sensor also includes an excitation coil 1, and the excitation coil 1 includes two layout forms:

[0046] The excitation coil 1 is only arranged on the second coil layer 11 and forms a plurality of equally spaced rectangular units in the second coil layer 11, and the two ends of the excitation coil 1 are respectively connected to the connection part 15; or one end of the excitation coil 1 is connected to the connection part 15 are connected and arranged in the first coil layer 9 to form a plurality of equidistant rectangular units, and pass thr...

specific Embodiment 2

[0071] Roughly the same as specific embodiment 1, the difference only lies in:

[0072] In the first coil layer 9 and the second coil layer 11 , the distance between two adjacent rectangular units is equal, and the range of the distance D is 12 mm.

[0073] The range of the single frequency in step (2) is 10MHz.

specific Embodiment 3

[0074] Roughly the same as specific embodiment 1, the difference only lies in:

[0075] In the first coil layer 9 and the second coil layer 11 , the distance between two adjacent rectangular units is equal, and the range of the distance D is 6mm.

[0076] The range of the single frequency in step (2) is 5MHz.

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Abstract

The invention relates to a high-sensitivity flexible eddy current array sensor, which comprises a sensor body and a connection part, wherein the connection part is positioned on one side of the sensorbody; the sensor body is provided with a first protection film layer, a first coil layer, a flexible substrate layer, a second coil layer and a second protection film layer in sequence from top to bottom; the sensor body also comprises an exciting coil and a plurality of induction coils, wherein the exciting coils comprise two layout forms: the exciting coils are arranged in the second coil layer, and forms a plurality of equal-interval rectangular units in the second coil layer, and two ends of each exciting coil are independently connected with the connection part; or one end of each exciting coil is connected with the connection part, and a plurality of equal-interval rectangular units are arranged and formed in the first coil layer, in addition, and one end of each exciting coil penetrates through the flexible substrate layer to the second coil layer and is connected with the connection part along the second coil layer. The invention also discloses a monitoring method based on thehigh-sensitivity flexible eddy current array sensor. By use of the system and the method, the quantitative monitoring of the crack damages of a plurality of key positions can be realized.

Description

technical field [0001] The invention belongs to the technical field of structural health monitoring, and relates to a sensor for continuous or regular monitoring of cracks in metal structures such as welding, curved surfaces, and planes, in particular to a high-sensitivity flexible eddy current array sensor and a monitoring method thereof. Background technique [0002] The crack damage of metal structure has become the main factor that endangers the safety of the structure, and the connection and transition parts of the metal structure are generally the areas where the structural stress is concentrated, and cracks are most likely to appear. [0003] Many equipment and facilities, such as aircraft, cranes, power generation equipment, pressure vessels, oil and gas pipelines, bridges, ships, etc., have had catastrophic accidents due to structural cracks. [0004] Structural health monitoring technology can detect structural defects in time and improve the safety and maintainabi...

Claims

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Application Information

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IPC IPC(8): G01N27/90
CPCG01N27/9006G01N27/9046
Inventor 陈涛何宇廷杜金强
Owner AIR FORCE UNIV PLA
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