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Capillary structure-based optical fiber high-temperature sensor and preparation method thereof

A technology of high-temperature sensors and capillary tubes, applied to thermometers, instruments, thermometers, etc. that undergo physical/chemical changes, can solve problems such as high cost and degradation, and achieve low cost, simple structure, and good measurement results

Inactive Publication Date: 2017-05-10
WUHAN INSTITUTE OF TECHNOLOGY
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide an optical fiber high-temperature sensor based on a capillary structure and a preparation method for the prior art that degrades when used at a high temperature above 1000 degrees and has a high cost.

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  • Capillary structure-based optical fiber high-temperature sensor and preparation method thereof
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Embodiment Construction

[0022] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0023] As shown in Fig. 1 (a) and Fig. 1 (b), the optical fiber high temperature sensor based on capillary structure of the embodiment of the present invention comprises capillary 2, and input optical fiber 1 and output optical fiber 3 are arranged at both ends of capillary 2; Fig. 2 ( As shown in a), the input end of the fiber optic high temperature sensor is connected to the light source through the input optical fiber 1, and the output end is connected to the spectrometer through the output optical fiber 3, both of which are single-mode optical fibers; the inner diameter of the capillary 2 is ...

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Abstract

The invention discloses a capillary structure-based optical fiber high-temperature sensor and a preparation method thereof. The sensor comprises a capillary tube. The two ends of the capillary tube are respectively provided with an input optical fiber and an output optical fiber. The input end of the optical fiber high-temperature sensor is connected with a light source through the input optical fiber. The output end of the optical fiber high-temperature sensor is connected with a spectrograph through the output optical fiber. The input optical fiber and the output optical fiber are single-mode optical fibers. The inner diameter of the capillary tube is 75 mum. The outer diameter of the capillary tube is 125 mum. The length of the capillary tube is 10 to 50 mm. when the ambient temperature of a detection area changes within the range of 0 to 1000 DEG C, the wavelength of each transmission peak in the capillary tube changes correspondingly. Through detecting the changing condition of the wavelength of the transmission peak by means of the spectrograph, the temperature change can be detected. The optical fiber high-temperature sensor is simple in structure, low in cost and high in measurement precision.

Description

technical field [0001] The invention relates to the field of optical fiber sensing, in particular to an optical fiber high-temperature sensor based on a capillary structure and a preparation method thereof. Background technique [0002] Temperature measurement involves a very wide range, involving environmental monitoring in various industries such as machinery industry, oil well, mining industry, and aerospace. There are many kinds of temperature sensors, including electrical devices such as thermal resistors and thermocouples. However, the service life and detection range of traditional electrical sensors are limited because their structures involve electrical materials. In addition, in special occasions, such as long-distance sensor signal transmission, its stability and reliability are restricted by many factors. Optical fiber temperature sensor is a device based on optical fiber. It has a compact structure and low price. It is suitable for large-scale detection and lo...

Claims

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Application Information

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IPC IPC(8): G01K11/32G01K11/3206
CPCG01K11/32
Inventor 刘书辉陆培祥田婕夏巨江
Owner WUHAN INSTITUTE OF TECHNOLOGY
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