A Fast Response Fiber Bragg Grating Temperature Sensor

A technology of temperature sensor and optical fiber grating, which is applied in thermometers, thermometers with physical/chemical changes, instruments, etc., can solve the problem that the optical fiber grating temperature sensor cannot have strong protection strength and response speed at the same time, so as to achieve easy implementation and strong protection The effect of strength and simple package structure

Active Publication Date: 2015-09-23
SHANGHAI KNP CHEM +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the technical problem that the fiber grating temperature sensor in the prior art cannot have strong protection strength and fast response speed at the same time, and to provide a kind of protection strength that is not only strong, but also can protect the environment temperature. Fast Response Fiber Bragg Grating Temperature Sensor

Method used

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  • A Fast Response Fiber Bragg Grating Temperature Sensor
  • A Fast Response Fiber Bragg Grating Temperature Sensor
  • A Fast Response Fiber Bragg Grating Temperature Sensor

Examples

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Embodiment 1

[0022] Example 1: Please also refer to Figure 1 to Figure 6 , figure 1 is a structural schematic diagram of the first embodiment of the present invention, figure 2 yes figure 1 side view diagram of image 3 is a schematic diagram of the appearance of the first embodiment of the present invention, Figure 4 is a schematic diagram of the appearance of the packaging tube in the first embodiment of the present invention, Figure 5 yes Figure 4 side view of the sectional view, Image 6 It is a schematic diagram of the structure of the rectangular optical fiber fixing sheet. As shown in the figure, the fast-response fiber grating temperature sensor includes a fiber grating 4, a fiber fixing sheet 2 for fixing the fiber grating 4, the fiber fixing sheet 2 is built into the packaging tube 3, and the center of the cross section opens a first through hole along the axial direction. The optical cable connector 11 and the second optical cable connector 12 are connected to the tw...

Embodiment 2

[0028] Example 2: Please also refer to Figure 7 to Figure 9 , Figure 7 is a schematic diagram of the appearance of the packaging tube in the second embodiment of the present invention, Figure 8 yes Figure 7 side view diagram of Figure 9 It is a structural schematic diagram of a dumbbell-shaped optical fiber fixing piece. The difference between embodiment 2 and embodiment 1 is that in embodiment 2, the tube wall material on the four sides is removed symmetrically in the axial direction on the outer wall of the packaging tube 3, such as Figure 8 As shown, the blank space in the dotted line is to remove the part of the tube wall material, so that the thickness of the packaging tube 3 is reduced, and the heat can be transmitted to the fiber grating 4 inside the packaging tube 3 more quickly, and the fiber grating 4 can control the ambient temperature. Changes in the system play a role of rapid response, and send out signals in a timely and accurate manner.

[0029]The d...

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Abstract

The invention discloses a fast response fiber bragg grating temperature sensor which comprises a fiber bragg grating, a fiber fixing sheet used for fixing the fiber bragg grating, a first optical cable connector and a second optical cable connector, wherein the fiber fixing sheet is arranged in a packaging tube, centers of cross sections of the first and the second optical cable connectors are provided with through holes along the axial direction, the fiber bragg grating fixed on the fiber fixing sheet respectively passes through the through holes of the first and the second optical cable connectors; and a tube wall material on one surface is at least removed from the outer wall of the packaging tube along the axial direction. According to the fiber bragg grating temperature sensor provided by the invention, the thickness of the partial region of the packaging tube is larger, so that higher protection strength is obtained for the fiber bragg grating, and response speed of the fiber bragg grating temperature sensor to the environment temperature is greatly increased. Meanwhile, the fiber bragg grating temperature sensor has a simple and compact packaging structure and is convenient for implementation.

Description

technical field [0001] The invention relates to the field of temperature sensors, in particular to the technical field of a fast-response fiber grating temperature sensor. Background technique [0002] At present, temperature sensors are widely used in various engineering structures, such as tunnels, bridges, dams, large buildings, etc., for construction monitoring, long-term health monitoring, and fire detection. Traditional temperature sensors have disadvantages such as low precision, susceptibility to electromagnetic interference, poor stability, and short signal transmission distance, making it difficult to perform accurate monitoring in harsh working environments. Compared with the traditional temperature sensor, the fiber grating temperature sensor has the advantages of high sensitivity, small size, light weight, safety explosion-proof, strong anti-electromagnetic interference ability, and long signal transmission distance. Therefore, the fiber grating temperature sens...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01K11/32G01K11/3206
Inventor 张杰钱洪卫夏懋寅陆宗源何唯平
Owner SHANGHAI KNP CHEM
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