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Tapered optical fiber temperature sensor and sensing probe manufacture method thereof

A technology of temperature sensor and tapered optical fiber, which is applied to the manufacturing field of tapered optical fiber temperature sensor and its sensing probe, can solve the problems of complex temperature sensor manufacturing process, high requirements of detection device, high cost of detection circuit, etc., and achieves a simple structure. , easy to manufacture, low cost effect

Inactive Publication Date: 2012-10-17
SHANGHAI UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

Although the above optical fiber temperature sensors have been widely used because of their good sensing performance, they still have shortcomings, such as the complex wavelength demodulation device of the fiber grating temperature sensor, and the relative manufacturing process of the fiber optic Fabry-Perot interferometric temperature sensor. Complicated, the optical fiber fluorescence temperature sensor has high requirements on the detection device, and the detection circuit of the Raman optical fiber temperature sensor is expensive

Method used

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  • Tapered optical fiber temperature sensor and sensing probe manufacture method thereof
  • Tapered optical fiber temperature sensor and sensing probe manufacture method thereof
  • Tapered optical fiber temperature sensor and sensing probe manufacture method thereof

Examples

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Embodiment 1

[0025] see figure 1 and figure 2 , the tapered fiber optic temperature sensor comprises a tapered fiber optic temperature sensing probe (2), characterized in that the input end of the tapered fiber optic temperature sensing probe (2) is connected to a light source (1); the tapered fiber optic The output end of the temperature sensing probe (2) is connected to the signal processing unit (4) through the optical detector (3); when the temperature around the cone area of ​​the tapered optical fiber temperature sensing probe (2) changes, its cone area fades away The field changes accordingly, thereby changing the optical power output by the tapered optical fiber temperature sensing probe (2); the optical detector (3) converts the optical signal output by the tapered optical fiber temperature sensing probe (2) into The electrical signal is sent to the signal processing unit (4), and the temperature information is obtained by converting the voltage value. The above-mentioned tape...

Embodiment 2

[0027] The manufacturing method of the tapered optical fiber temperature sensing probe is used for the production of the above-mentioned tapered optical fiber temperature sensing head, and its operation method is as follows:

[0028] 1) Take a section of optical fiber, peel off the coating layer to obtain a section of bare fiber, and repeatedly wipe the cladding of the bare fiber with alcohol for use;

[0029] 2) Slowly melt the bare fiber and taper, the taper speed is 0.1mm / sec, the longer the stretch length of the taper area, the smaller the diameter of the taper waist, the higher the sensitivity, and the stretch length is 10-20mm;

[0030] 3) Seal the drawn tapered optical fiber in the quartz U-shaped groove with epoxy glue;

[0031] 4) Coat the temperature-sensitive material (8) on the tapered region of the tapered optical fiber, and cover with a protective sleeve (9).

[0032] image 3 Shown in the high-sensitivity tapered optical fiber temperature sensor is the relatio...

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Abstract

The present invention relates to a tapered optical fiber temperature sensor and a sensing probe production method thereof. The temperature sensor comprises a tapered optical fiber temperature sensing probe. An input terminal of the tapered optical fiber temperature sensing probe is connected with a light source. An output terminal of the tapered optical fiber temperature sensing probe is connected to a signal processing unit through an optical detector. When a cone zone ambient temperature of the tapered optical fiber temperature sensing probe changes, a cone zone evanescent field changes correspondingly, so that an optical power outputted by the tapered optical fiber temperature sensing probe is changed. The optical detector converts an optical signal outputted by the tapered optical fiber temperature sensing probe into an electric signal and sends the electric signal to the signal processing unit, and temperature information is obtained through voltage conversion. The sensor and the method have the advantages of simple structure and high sensitivity, the sensing probe is easy to manufacture and low in cost, and is suitable for diverse industrial, agricultural, scientific research occasions of oil depot tank group temperature monitoring, power system temperature monitoring, mine tunnel fire monitoring, greenhouse granary temperature monitoring, building structure health monitoring and the like.

Description

technical field [0001] The invention relates to a tapered optical fiber temperature sensor and a manufacturing method thereof, belonging to the field of optical fiber sensing. Background technique [0002] Temperature is one of the most basic and important physical quantities in science and technology. Temperature detection and control play a very important role in various sectors of the national economy and people's daily lives. Optical fiber temperature sensor has the advantages of anti-electromagnetic interference, flame-proof, explosion-proof, small size, and little influence on the measured temperature field. It has great application potential in the fields of electric power industry, machinery industry, automobile industry, steel industry, chemical industry, etc . There are many types of fiber optic temperature sensors, mainly fiber grating temperature sensors, fiber optic Fabry-Perot interferometric temperature sensors, fiber optic fluorescence temperature sensors, R...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01K11/32G01K1/08
Inventor 王廷云朱姗邢洁雯庞拂飞王文辕
Owner SHANGHAI UNIV
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