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Eliminating method of inertial deviation in optical fiber sensing corrosion detecting aluminium material

A technology for initial error and corrosion detection, applied in the fields of weather resistance/light resistance/corrosion resistance, analytical materials, preparation of samples for testing, etc.

Inactive Publication Date: 2008-05-14
725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Some researchers have developed a corrosion monitoring method for aluminum materials with optical fiber sensing, but there are obvious initial errors when using optical fiber sensing technology to detect corrosion of aluminum materials, and this error is not easy to eliminate under normal circumstances. , there is no reported method to solve this error

Method used

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  • Eliminating method of inertial deviation in optical fiber sensing corrosion detecting aluminium material
  • Eliminating method of inertial deviation in optical fiber sensing corrosion detecting aluminium material
  • Eliminating method of inertial deviation in optical fiber sensing corrosion detecting aluminium material

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Embodiment 1

[0023] Get 50 centimeters of commercially available conventional optical fibers, remove the protective layer and the coating layer, soak in 10% hydrofluoric acid solution for 1 hour to remove the cladding (the fiber core diameter reaches 52.5 μm); In the coating machine, aluminum is used as the target material to deposit an aluminum layer for 30 minutes to form a metal-sensitive film of aluminum material, and then it is taken out; then the optical fiber with a vacuum-deposited metal-aluminum material sensitive film is boiled in 100°C water for 60 minutes, and placed in the optical fiber corrosion monitoring simulated corrosion experiment device The optical detection of the corrosion process is carried out, and the detection results can be displayed in the change curve of the optical fiber transmission power in the corrosion process after the sealing treatment; the result is that the initial error of the output optical power disappears, and the sealing effect of the sensitive fil...

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Abstract

The invention relates to a method to avoid the initial error for fiber sensor corrosion testing aluminum material. It includes the following steps: selecting a normal communication fiber, removing fiber sheath and coating layer, removing cladding by hydrofluoric acid and making fiber core diameter reach 50-60um, making fiber core aluminum metal sensitive film and boiling the coating fiber, taking sealing process for 30-180min to make the aluminum metal sensitive film expand to decrease the surface Millipore quality on surface and decrease initial error. It can ensure the accuracy of testing result.

Description

Technical field: [0001] The invention belongs to the technical field of optical fiber sensing corrosion monitoring and is used for eliminating the initial error of metal materials in corrosion detection, in particular to a method for eliminating the initial error of optical fiber sensing corrosion detection of aluminum materials. technical background: [0002] At present, the commonly used carrier-based aircraft is seriously overdue, and the corrosion monitoring of the aircraft skin structure is essential. In the marine environment, metal corrosion monitoring is mostly visual inspection. When the metal corrosion phenomenon can be found, the corrosion thickness has reached 10% of the original metal layer thickness, and the loss is quite serious. It is more difficult. This visual inspection method consumes a lot of manpower and material resources, especially the disassembly and assembly inspection of uncorroded parts will destroy the integrity of the original materials and re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N17/02G01N1/28
Inventor 董飒英
Owner 725TH RES INST OF CHINA SHIPBUILDING INDAL CORP