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D-shaped wound type polymer optical fiber corrosion sensor as well as preparation method and application thereof

A technology of corrosion sensor and polymer, which is used in optical fiber transmission, weather resistance/light resistance/corrosion resistance, instruments, etc. It can solve the problems of affecting the corrosion state of steel bars, excessive winding of optical fibers, and easy falling off of fixed points of optical fibers.

Pending Publication Date: 2018-06-19
XI AN JIAOTONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The disadvantage of this sensor is that the fixed point of the optical fiber is easy to fall off, the optical fiber is too tightly wound, and the protective layer of water-permeable materials will also affect the real corrosion state of the steel bar.

Method used

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  • D-shaped wound type polymer optical fiber corrosion sensor as well as preparation method and application thereof
  • D-shaped wound type polymer optical fiber corrosion sensor as well as preparation method and application thereof
  • D-shaped wound type polymer optical fiber corrosion sensor as well as preparation method and application thereof

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Embodiment Construction

[0040] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "left", "right", "inner", "outer", "side", "one end" etc. are based on The orientation or positional relationship shown in the drawings is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as Limitations on the Invention.

[0041] In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; it can be mechanically connected or electrically connected...

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Abstract

The invention discloses a D-shaped wound type polymer optical fiber corrosion sensor as well as a preparation method and application thereof. The D-shaped wound type polymer optical fiber corrosion sensor comprises a D-shaped polymer optical fiber, wherein the D-shaped polymer optical fiber is arranged on the surface of a steel bar element; pull stress of the D-shaped polymer optical fiber is concentrated along with corrosion of the steel bar element; a corrosion state of the steel bar element is determined according to a change of a D-shaped cross section of the D-shaped polymer optical fiber. The steel bar element made of a same material as engineering steel is closer to an actual situation. The sensor is high in sensitivity, high in accuracy and high in electromagnetic interference resistance, can realize lossless, quantitative and online monitoring of steel bars in concrete, and provides conditions for finding corrosion early and taking measures immediately.

Description

technical field [0001] The invention belongs to the technical field of optical fiber sensors, and in particular relates to a D-shaped winding polymer optical fiber corrosion sensor and its preparation method and application. Background technique [0002] The corrosion of steel bars is regarded as the most important factor leading to premature failure of concrete structures in the world. The corrosion of steel bars will reduce the ductility of concrete structures and reduce their load-bearing capacity, which directly affects the safety performance of structures. And durability, more severe corrosion will directly cause structural damage, resulting in high maintenance costs. Monitoring the corrosion status of steel bars in reinforced concrete structures is an important problem that needs to be solved urgently. If the corrosion information of steel bars can be grasped in real time and the durability of the structure can be evaluated, it can be used as a basis for structural rei...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N17/00H04B10/25G08C23/06
CPCH04B10/25G08C23/06G01N17/006
Inventor 罗冬李跃进李鹏刘唐旻贾立统戴杰李俊楠李媛媛
Owner XI AN JIAOTONG UNIV
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