Optical fiber sensor for simultaneously monitoring stress and corrosion rate of reinforcing steel bar

A technology of optical fiber sensor and corrosion rate, which is applied in weather resistance/light resistance/corrosion resistance, instruments, measuring devices, etc. It can solve the problems of unsuitable steel corrosion monitoring, complicated monitoring process, limited range, etc., and achieve reasonable cost and anti-interference Strong, easy-to-make effects

Pending Publication Date: 2021-12-17
DALIAN UNIV OF TECH
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Problems solved by technology

However, the above methods generally have disadvantages such as inconvenient operation, complicated monitoring process, and not suitable for monitoring steel corrosion in civil engineering structures.
At present, the monitoring method of steel bar stress mainly uses the steel bar stress gauge to complete the measurement of steel bar stress, but it has the disadvantages of complicated installation and limited range.

Method used

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  • Optical fiber sensor for simultaneously monitoring stress and corrosion rate of reinforcing steel bar
  • Optical fiber sensor for simultaneously monitoring stress and corrosion rate of reinforcing steel bar
  • Optical fiber sensor for simultaneously monitoring stress and corrosion rate of reinforcing steel bar

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Embodiment Construction

[0050] In order to make the purpose, features and advantages of the present invention more intuitive and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the following described The embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0051] As shown in the schematic diagram, an optical fiber sensor for simultaneously monitoring the stress and corrosion rate of steel bars includes a transmission optical fiber 1, a capillary steel tube 3, a long-period fiber grating 4, a flexible waterproof sealing material 5, an outer casing 6, and a reflection m...

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Abstract

The invention belongs to the technical field of structural health monitoring or sensors, and discloses an optical fiber sensor for simultaneously monitoring stress and corrosion rate of reinforcing steel bars. The optical fiber sensor comprises a transmission optical fiber, a capillary reinforcing steel bar pipe, a long-period fiber grating, a flexible waterproof sealing material, an external bushing, a reflecting mirror surface, a connecting key and a clamp. According to the invention, the sensor comprehensively utilizes a Fabry-Perot resonator and a long-period fiber grating, indirectly monitors the stress and corrosion rate of reinforcing steel bars by simultaneously monitoring the change of reflection spectrum signals of the Fabry-Perot resonator and the long-period fiber grating under different reinforcing steel bar corrosion rates and reinforcing steel bar stress conditions, can realize long-term, lossless and real-time simultaneous monitoring of the stress and the corrosion rate of the reinforcing steel bars, is high in measurement precision and large in measuring range, has the advantages of being relatively simple to manufacture, small in size, high in strength, high in sensitivity and the like, has a wide application prospect, and is easy to popularize.

Description

technical field [0001] The invention relates to an optical fiber sensor for simultaneously monitoring steel bar stress and corrosion rate, and belongs to the technical field of structural health monitoring or the technical field of sensors. Background technique [0002] As one of the most widely used civil engineering materials in the world today, steel bars have many advantages such as high strength, high plasticity and toughness, and are easy to manufacture. Its high tensile properties can well adapt to the high compressive properties of concrete. important reason for its widespread use. [0003] However, due to the working nature of civil engineering structures during their service, they are very easily exposed to corrosive environments, such as marine environments such as docks, seaports, and cross-sea bridges. Even if it is only a civil engineering structure working in an ordinary atmospheric environment, with the passage of service time, the development of concrete cr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N17/00
CPCG01N17/006
Inventor 唐福建林思雨李宏男
Owner DALIAN UNIV OF TECH
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