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Online detection method for metal surface microcracks

A metal surface and detection method technology, applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problems of high cost of instruments and equipment, inability to implement effectively, complex instruments and equipment, etc., and achieve the effect of low detection cost

Inactive Publication Date: 2016-03-23
CHINA ELECTRONICS ENG DESIGN INST
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0003] The existing micro-crack detection technologies mainly include eddy current method, ultrasonic method and radiographic flaw detection method. These methods require complex instruments and equipment, and cannot be effectively implemented in most concealed environments.
[0004] Therefore, the crack detection method in the prior art has the defects and deficiencies that it is inconvenient to detect some hidden parts and the cost of equipment is high.

Method used

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  • Online detection method for metal surface microcracks

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Embodiment Construction

[0013] The present invention proposes a method for on-line detection of micro-cracks on metal surfaces, which includes the following steps: (1), laying at least one layer of microstrip line 200 on the surface of the metal member 100 to be tested; (2), placing the metal member 100 to be tested as Make the grounding layer of the microstrip line 200; (3), connect the microstrip line 200 to the electromagnetic wave transmitting device (not shown); (4), inject electromagnetic waves to the microstrip line 200 through the electromagnetic wave transmitting device; (5), measure The electromagnetic wave reflection of the microstrip line 200 is used as the basis for judging whether there are microcracks 110 on the surface of the metal member 100 to be tested; Microcracks 110 exist in regions corresponding to one or more positions of the microstrip line on the metal member 100 .

[0014] Optionally, one or more layers of microstrip lines may be laid on the surface of the metal component 1...

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Abstract

The invention discloses an online detection method for metal surface microcracks. The online detection method includes the steps that at least one layer of microstrip lines are laid on the surface of a metal component to be detected; the metal component to be detected is used as a grounding layer for the microstrip lines; the microstrip lines are connected to electromagnetic wave emitting equipment; electromagnetic waves are injected to the microstrip lines through the electromagnetic wave emitting equipment; electromagnetic wave reflection of the microstrip lines is measured to serve as the basis for judging whether the microcracks exist on the surface of the metal component or not; if it is detected that electromagnetic wave reflection of one or more positions of the microstrip lines is abnormal, it is judged that the microcracks exist in regions, corresponding to one or more positions of the microstrip lines, on the metal component.

Description

technical field [0001] The invention relates to a metal material detection method, in particular to a metal material surface fatigue crack detection method. Background technique [0002] As we all know, microcracks on the metal surface will seriously affect the service life of metal components. For some metal components with high safety requirements, on-line detection of micro-cracks on the metal surface is of great significance, especially for the micro-crack detection of metal components in some concealed environments. These common important components are: the connection between the wing and the fuselage of the aircraft, the key force-bearing connecting pin of the elevator, the welding of the pressure vessel, etc. [0003] The existing micro-crack detection technologies mainly include eddy current method, ultrasonic method and radiographic flaw detection method. These methods require complex instruments and equipment, and cannot be effectively implemented in most conceal...

Claims

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Application Information

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IPC IPC(8): G01N23/20
CPCG01N23/20G01N2223/052
Inventor 李卫李强黄文胜
Owner CHINA ELECTRONICS ENG DESIGN INST
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