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Annular fiber grating temperature sensor and packaging method

A temperature sensor, fiber grating technology, applied in thermometers, thermometers with physical/chemical changes, instruments, etc., to achieve the effects of increasing temperature sensitivity, increasing wavelength variation, and low repeatability error

Inactive Publication Date: 2017-10-24
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a ring type fiber grating temperature sensor and packaging method, which can solve the problem that the linearity between the central wavelength and temperature of the packaged fiber grating is lower than that of the unpackaged state. The problem of linearity between temperatures

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  • Annular fiber grating temperature sensor and packaging method
  • Annular fiber grating temperature sensor and packaging method
  • Annular fiber grating temperature sensor and packaging method

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Embodiment Construction

[0029] The present invention will be further described below in conjunction with specific examples and accompanying drawings.

[0030] like Figure 1 to Figure 4 As shown, a ring-type optical fiber grating temperature sensor includes an optical fiber 11, a grating 5 is arranged on the optical fiber 11, and an elastic deformation body, the elastic deformation body is a ring 1, and through holes 9 are arranged on both sides of the ring 1 And the blind hole 10, the upper and lower sides are pasted with metal sheets for packaging and heat conduction; the through hole 9 communicates with the blind hole 10, and the through hole 9 is covered with a capillary metal tube 4, and the capillary metal tube 4 and the ring 1 The inner wall is fixed (AB glue 3 is used for fixing in this embodiment), the optical fiber 11 is passed through the capillary metal tube 4, and the grating 5 on the optical fiber 11 is located in the center of the ring 1, and the blind hole 10 is filled with glue for f...

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Abstract

The invention provides a ring-type optical fiber grating temperature sensor, which includes an optical fiber, a grating is arranged on the optical fiber, and an elastic deformation body, the elastic deformation body is a ring, and through holes and blind holes are arranged on both sides of the ring. Metal sheets for encapsulation and heat conduction are attached; the through holes communicate with the blind holes, and capillary metal tubes are set in the through holes, and the capillary metal tubes are fixed to the inner wall of the ring. The grating is located at the axis of the ring, and the blind hole is filled with glue for fixing the optical fiber. The sensor of the invention has high linearity, high sensitivity and good repeatability.

Description

technical field [0001] The invention relates to the technical field of temperature sensing and monitoring, in particular to an annular fiber grating temperature sensor and a packaging method. Background technique [0002] Studies have shown that the change of the central wavelength of fiber gratings is related to factors such as temperature, and there is a linear relationship between wavelength and temperature. Fiber grating has the characteristics of corrosion resistance, anti-electromagnetic interference, light wave communication, and non-electric transmission, so the grating is especially suitable for real-time temperature monitoring in petroleum, chemical, mining and other places that require fire protection and explosion protection. By properly encapsulating the grating, the fiber grating temperature sensor has been gradually applied to various fields. [0003] Bare gratings are generally not directly used in actual engineering sensing measurements because they are eas...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01K11/32G01K11/3206
Inventor 刘明尧张志建彭霜谭跃刚周祖德
Owner WUHAN UNIV OF TECH