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Optical fiber grating temperature sensor and preparation method

A technology of temperature sensor and optical fiber grating, which is applied in thermometers, thermometers with physical/chemical changes, instruments, etc., can solve the problems that ordinary optical fiber grating sensors are difficult to apply to high temperature environments, and the optical fiber is fragile and easy to break, so as to achieve low production cost and high production cost. Ease of method, effect of good temperature sensitivity

Active Publication Date: 2018-07-27
BEIJING INST OF AEROSPACE CONTROL DEVICES
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is: to overcome the deficiencies of the prior art, to provide a fiber grating temperature sensor and its preparation method; to solve the problem that ordinary fiber grating sensors are difficult to apply to high-temperature environments, and that the optical fiber is fragile and easy to break after high-temperature annealing problem, give a reliable high-temperature packaging method

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  • Optical fiber grating temperature sensor and preparation method
  • Optical fiber grating temperature sensor and preparation method
  • Optical fiber grating temperature sensor and preparation method

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Embodiment Construction

[0047] In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0048] figure 1 It is a structural schematic diagram of a fiber grating temperature sensor of the present invention. The fiber grating temperature sensor includes a quartz tube 2, a ceramic cap 3, and an optical fiber 5; one end of the optical fiber 5 is provided with a regenerated fiber grating 1; The regenerated fiber grating 1 is prepared by annealing an ordinary fiber grating at a high temperature of 1000°C; the quartz tube 2 is set on the optical fiber 5 to cover the regenerative fiber grating 1; the ceramic cap 3 is set on the quartz tube 2 to cover the entire quartz tube 2 The end of the quartz tube 2 away from the regenerative fiber grating 1 is connected to the optical fiber 5 through the high temperature glue 4; The fiber g...

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Abstract

The invention discloses an optical fiber grating temperature sensor. The sensor comprises an optical fiber, a quartz tube and a ceramic cap. A regeneration optical fiber grating is prepared by conducting high-temperate annealing of 1,000 DEG C on a common optical fiber grating, before annealing, the optical fiber grating is subjected to high-temperate tubular encapsulation at first, an inner layerof an encapsulation structure is the quartz tube, an outer layer is the ceramic cap, the optical fiber grating is arranged at the top of the encapsulation structure, and the other end is bonded and fixed by adopting high-temperate glue. According to the high-temperature optical fiber grating temperature sensor with high reliability and stability, application of the optical fiber grating temperature sensor in the high-temperature environment of 1,000 DEG C is successfully achieved, and the sensor has high measurement precision and high-temperature stability and is suitable for temperature measurement in the high-temperature fields such as aeronautics and astronautics, petroleum electric power and chemical industry smelting.

Description

technical field [0001] The invention relates to an optical fiber grating temperature sensor and a preparation method, belonging to the field of temperature sensors. Background technique [0002] Temperature is closely related to human production and life, and temperature detection is crucial. Traditional electrical sensors are susceptible to electromagnetic interference, and it is difficult to be intelligent and not easy to network. Optical fiber temperature sensors can effectively solve these problems, so they have developed rapidly in recent years. Fiber Bragg grating sensor is a fiber optic sensor based on wavelength demodulation. It has the characteristics of light weight, small size, anti-electromagnetic interference, corrosion resistance, and intrinsic safety. It is suitable for use in flammable, explosive, and corrosive extreme environments. Currently, It has been widely used in the sensing and monitoring of temperature or strain in the fields of power monitoring, st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01K11/32G01K11/3206
CPCG01K11/32
Inventor 薛渊泽王学锋唐才杰卞贺明崔留住
Owner BEIJING INST OF AEROSPACE CONTROL DEVICES
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