Manufacturing method of embedded fiber grating steel bar corrosion sensor
A fiber grating and steel bar corrosion technology, which is applied in the direction of instruments, scientific instruments, and optical devices, can solve the problems of continuous monitoring, easy to be affected by the external environment, and difficult to be used in actual engineering, so as to improve the survival rate and durability , Packaging and installation process is simple and reliable
Active Publication Date: 2020-03-31
武汉地震工程研究院有限公司
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Problems solved by technology
[0005] At present, there are few optical fiber corrosion sensors available in engineering, and there are some defects, such as being easily affected by the external environment, only measuring early corrosion, incomplete packaging protection, difficult to use in actual engineering, and unable to continuously monitor, etc.
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[0041] In conjunction with the accompanying drawings, the technical solution of the present invention is further described through specific embodiments.
[0042] A built-in optical fiber grating steel bar corrosion sensor includes: steel bar cylinder 1, optical fiber grating rust expansion strain sensor 8, optical fiber grating temperature sensor 14, pressure bearing block 10, capillary stainless steel tube, filter paper 2 and mortar protective layer 11.
[0043] The steel bar cylinder 1 uses the structural steel bar 12 in the actual project as a raw material, and is finely processed into a short cylinder; at the middle height of the steel bar column 1, a radial through hole 6 passing through the axis is machined along the diameter, which is used to place the fiber grating. Strain sensor 8; Axial through-hole 9 is processed parallel to the central axis of steel bar cylinder 1 at the quarter point of diameter, for placing fiber grating temperature sensor 14, and the two ends of ...
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Abstract
The invention discloses a manufacturing method of an embedded fiber grating steel bar corrosion sensor. The embedded fiber grating steel bar corrosion sensor comprises a steel bar cylinder, a fiber grating rust expansion strain sensor, a fiber grating temperature sensor, a pressure-bearing block, a capillary stainless steel tube, filter paper and a mortar protection layer, a radial through hole isformed in the middle height position of the steel bar cylinder, a capillary stainless steel pipe is fixed in the radial through hole, a fiber grating rust expansion strain sensor is installed in thecapillary stainless steel pipe, and the two ends of the fiber grating rust expansion strain sensor are fixed to pressure bearing blocks; and the steel bar cylinder is provided with an axial through hole used for placing a fiber grating temperature sensor. The device has the dual measurement functions of the steel bar corrosion rate and the temperature; reinforcing steel bar corrosion sensors withdifferent ranges can be obtained by changing the thickness of the pressure-bearing block and the diameter of the reinforcing steel bar cylinder; the manufacturing method is simple and reliable, and the survival rate and durability of the sensor are improved; the sensor is small in size, simple in structure and convenient to arrange, and the structural stress performance is not affected.
Description
technical field [0001] The invention belongs to the field of structural health monitoring and optical fiber grating sensors, and in particular relates to a method for manufacturing an embedded optical fiber grating steel bar corrosion sensor. Background technique [0002] Reinforced concrete structure has become the most widely used structural form in the field of civil engineering because of its good plasticity, low cost, and local materials. Reinforced concrete structures have good durability in general service environments, but in corrosive environments such as seawater and deicing salts, the steel bars in the concrete are easily corroded, resulting in cracking and spalling of the concrete protective layer, reducing the adhesion between the steel bars and concrete. joint performance, and even lead to a decrease in the bearing capacity of the structure and cause the structure to collapse. [0003] Commonly used steel corrosion detection methods include chisel detection me...
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IPC IPC(8): G01B11/16G01K11/32G01K11/3206
CPCG01B11/165G01K11/3206
Inventor 张作才冯谦王浩
Owner 武汉地震工程研究院有限公司