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Optical fiber temperature sensor

A fiber optic temperature and sensor technology, applied to thermometers, thermometers with physical/chemical changes, instruments, etc., can solve the problems of narrow working temperature range, short detection distance, complex fiber optic temperature sensor device, etc., and achieve wide working temperature range, Small package size, easy and convenient on-site installation and debugging

Active Publication Date: 2015-12-30
FEMTO TECH XIAN
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to solve the technical problems of traditional optical fiber temperature sensor devices such as complex device, short detection distance and narrow working temperature range

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  • Optical fiber temperature sensor
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Embodiment Construction

[0019] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present invention are shown in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field of the present invention. The terminology used in the specification of the present invention herein is only for the purpose of describing specific embodiments, and is not intended to limit the present invention. The term "and / or" as used herein includes any and all combinations of one or more related...

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Abstract

The invention provides an optical fiber temperature sensor comprising an optical transmit-receive module, a transmission optical fiber and an optical temperature sensing element. The optical transmit-receive module comprises a light source, an optical fiber coupler, a polarizer and a temperature signal demodulation unit. The optical fiber coupler comprises a first port, a second port and a third port. The first port directly receives light emitted by the light source. The second port is connected with the polarizer. The third port is connected with the temperature signal demodulation unit. The transmission optical fiber is connected with the polarizer and the optical temperature sensing element. The light emergent end surface of the optical temperature sensing element is provided with a total reflection film. The optical fiber temperature sensor is simple in device, long in detection distance and wide in working temperature range.

Description

Technical field [0001] The invention relates to the technical field of optical fiber sensing, in particular to an optical fiber temperature sensor. Background technique [0002] When performing temperature detection at outdoor gas stations and oil storage depots, in order to prevent electrical equipment from igniting and detonating oil, the temperature detector must be required to work passively. Therefore, optical fiber temperature sensors are often used to detect temperature. However, the traditional fiber Bragg grating sensor (FBG) sensor has low sensitivity to temperature, and the demodulation device is complicated and expensive; the temperature detection distance of the fluorescence temperature sensor is short; the crystal absorption fiber temperature sensor is due to the crystal Absorbing characteristics, it cannot work normally below zero. Summary of the invention [0003] The purpose of the present invention is to solve the technical problems of the traditional optical fi...

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Application Information

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IPC IPC(8): G01K11/32
Inventor 姚胜利许宁
Owner FEMTO TECH XIAN