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Fibre-optical sensing device for monitoring metal rust

A technology of optical fiber sensing and optical fiber, which is applied in the direction of measuring device, phase influence characteristic measurement, material analysis through optical means, etc., to achieve the effect of simple structure, easy manufacture, and high initial corrosion sensitivity

Inactive Publication Date: 2008-10-08
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Not suitable for monitoring during early and normal operations

Method used

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  • Fibre-optical sensing device for monitoring metal rust
  • Fibre-optical sensing device for monitoring metal rust
  • Fibre-optical sensing device for monitoring metal rust

Examples

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Embodiment Construction

[0027] see first image 3 , image 3 Embodiment 1 of the present invention—a schematic diagram of a Mach-Zehnder interferometer, as can be seen from the figure, the optical fiber sensing device for monitoring metal corrosion of the present invention, its composition includes:

[0028] A detection head A is formed by winding N turns of the first optical fiber 2 on the cylindrical metal structure material 1 to be monitored;

[0029] A reference head B is formed by winding N turns of the second optical fiber 21 on a corrosion-resistant material 4 having the same configuration and radius as the metal structural material 1 to be monitored;

[0030] One end of the first optical fiber 2 of the probe head A and one end of the second optical fiber 21 of the reference head B are coupled through the first optical fiber coupler 5 with a beam splitting ratio of 1:1 to form the first port 01 and the second port 02, the other ends of the first optical fiber 2 and the second optical fiber 2...

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Abstract

A monitor metal rusts away the optical fiber transmitter, its constitution includes: The detecting head is in waits on the monitor metal material by the first optical fiber to twine the N circle constitution; Reference is in one with treats on the monitor metal structure material configuration and the radius same anti-corrosive material by the second optical fiber twines the N circle constitution; States a detecting head first optical fiber end and refers to the head a second optical fiber end to tie the ratio after the minute is 1: 1 first optical fiber coupler coupling and forms the first port and the second port, states the first optical fiber and the second optical fiber another end ties the ratio after the minute is 1: 1 second optical fiber coupler coupling and forms the third port and the fourth port. This invention has the structure simply, the manufacture is easy, may obtain the high sensitivity survey; May use certain optical fiber paths of rays to constitute the multi- viewpoints the distributional supervisory system.

Description

technical field [0001] The invention relates to optical fiber sensing, in particular to an optical fiber sensing device for monitoring metal corrosion, which is mainly used in monitoring the corrosion of steel used in buildings such as steel cables, reinforced concrete bridges, roads, and houses in the air. It can also be used to monitor the corrosion of aluminum and other metal structures in various atmospheres. Background technique [0002] Reinforced concrete and steel cables are the most widely used building structural materials in modern infrastructure. Steel has the advantages of high strength, easy processing, and abundant resources on the earth, but iron, the main component of steel, is easily oxidized and corroded by moisture and oxygen. Corrosion of steel cables and steel bars will lead to a decrease in the strength of the structure, and even lead to the collapse of the structure, resulting in huge losses of human life and property. Aluminum or other metal materi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/45G01N21/17G01N21/84
Inventor 方祖捷瞿荣辉蔡海文阳莎耿建新
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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