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Optical fiber temperature sensor, sensing head structure and preparation method

An optical fiber temperature and sensor technology, applied in the field of sensor head structure and preparation, and optical fiber temperature sensor, can solve the problem that the temperature sensor cannot meet the high-precision measurement requirements, and achieve the effect of enhanced vernier effect and improved temperature measurement sensitivity.

Active Publication Date: 2021-07-06
GUANGDONG OCEAN UNIVERSITY
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Problems solved by technology

With the increasing demand for temperature sensing applications, traditional temperature sensors have been unable to meet the high-precision measurement requirements

Method used

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  • Optical fiber temperature sensor, sensing head structure and preparation method
  • Optical fiber temperature sensor, sensing head structure and preparation method
  • Optical fiber temperature sensor, sensing head structure and preparation method

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Embodiment Construction

[0035] Exemplary embodiments of the present invention will be described below with reference to the accompanying drawings. In the interest of clarity and conciseness, not all features of an actual implementation are described in this specification. It should be understood, however, that in developing any such practical embodiment, many implementation-specific decisions must be made in order to achieve the developer's specific goals, such as meeting those constraints related to the system and business, and those Restrictions may vary from implementation to implementation. Furthermore, it should be understood that development work, while potentially complex and time-consuming, would nevertheless be a routine undertaking for those skilled in the art having the benefit of the teachings herein.

[0036] Here, it should also be noted that, in order to avoid obscuring the present invention due to unnecessary details, only the device structure and / or processing steps closely related ...

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Abstract

The invention provides an optical fiber temperature sensor, a sensing head structure and a preparation method. The optical fiber temperature sensor comprises a wide-spectrum light source, a first optical fiber coupler, a spectrograph, a first sensing interferometer and a second sensing interferometer. The first sensing interferometer and the second sensing interferometer have opposite temperature responses. A first free spectral range corresponding to the first sensing interferometer is close to but not equal to a second free spectral range corresponding to the second sensing interferometer. According to the technology, the two sensing interferometers sensitive to the temperature are adopted, and the responses of the two sensing interferometers to the temperature are opposite, so that an enhanced vernier effect is achieved, and compared with the prior art, the temperature measurement sensitivity is improved.

Description

technical field [0001] Embodiments of the present invention relate to the field of optical fiber sensing, and more specifically, embodiments of the present invention relate to an optical fiber temperature sensor, a sensing head structure, and a manufacturing method. Background technique [0002] As one of the seven basic physical quantities of the International System of Units, temperature plays an important role in the accurate measurement of temperature in the fields of national economy, national defense construction and scientific research. With the increasing demand for temperature sensing applications, traditional temperature sensors have been unable to meet the high-precision measurement requirements. Optical fiber temperature sensor has many advantages such as small size, high measurement accuracy, high sensitivity, strong resistance to electromagnetic interference, good electrical insulation, and wide temperature range, and has its own unique advantages in temperatur...

Claims

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Application Information

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IPC IPC(8): G01K11/32G01D5/353
CPCG01K11/32G01D5/35312G01D5/35322G01K11/3206G01K5/58G02B6/2934G02B6/29359G02B6/29347G02B6/024G02B6/266G02B2006/12157
Inventor 杨玉强牟小光师文庆刘洺辛王骥
Owner GUANGDONG OCEAN UNIVERSITY
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