A Fiber Bragg Grating Temperature Sensor with Radiation Drift Self-Compensation

A technology of temperature sensor and optical fiber grating, which is applied in the field of optical fiber grating temperature sensor, can solve the problems of volume, weight, response time limitation, and difficulty of fiber grating wavelength drift, etc., so as to reduce volume and weight, improve response time, and improve long-term The effect of precision

Active Publication Date: 2021-04-13
BEIJING INST OF AEROSPACE CONTROL DEVICES
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  • Abstract
  • Description
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Problems solved by technology

[0004] The technical problem solved by the present invention is: to overcome the deficiencies of the prior art, a fiber grating temperature sensor with self-compensation for radiation drift is proposed, which overcomes the difficulty of further reducing the wavelength drift of the fiber grating caused by radiation through optical fiber materials and manufacturing processes , through radiation protection reinforcement to reduce the wavelength drift of fiber grating caused by radiation is limited by the volume, weight and response time of the sensor

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  • A Fiber Bragg Grating Temperature Sensor with Radiation Drift Self-Compensation
  • A Fiber Bragg Grating Temperature Sensor with Radiation Drift Self-Compensation
  • A Fiber Bragg Grating Temperature Sensor with Radiation Drift Self-Compensation

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Embodiment Construction

[0020] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0021] figure 1 It is a structural schematic diagram of a radiation drift self-compensating fiber grating temperature sensor provided by an embodiment of the...

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Abstract

The invention discloses a radiation drift self-compensating fiber grating temperature sensor, comprising a temperature sensor substrate, a first fiber grating, and a second fiber grating; the first fiber grating and the second fiber grating have different wavelength drifts—radiation dose sensitivity ; According to the difference in the wavelength drift of the first fiber Bragg grating and the second fiber Bragg grating under the action of radiation, the wavelength drift of the fiber Bragg grating caused by radiation is compensated to reduce the error of the fiber Bragg grating temperature sensor caused by radiation.

Description

technical field [0001] The invention belongs to the technical field of optical fiber sensing, in particular to a radiation drift self-compensating optical fiber grating temperature sensor. Background technique [0002] Fiber Bragg grating temperature sensor has the advantages of anti-electromagnetic interference, small size, easy signal transmission, easy reuse, good stability, etc., and has important applications in temperature monitoring in harsh environments. However, in space, nuclear power and other environments, the wavelength shift of fiber gratings caused by radiation reduces the accuracy of fiber grating temperature sensors during long-term use. [0003] For the wavelength change of fiber gratings caused by radiation, the existing methods to reduce the wavelength shift of fiber gratings caused by radiation include: using a hydrogen-free process to make fiber gratings, using femtosecond lasers to write fiber gratings, using radiation protection and reinforcement, and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01K11/32
CPCG01K11/32
Inventor 唐才杰卞贺明王学锋蓝天崔留住李保勇
Owner BEIJING INST OF AEROSPACE CONTROL DEVICES
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