Fibre optic sensor for measuring temperature and refractive index of liquid contemporarily

A refractive index sensor and optical fiber sensing technology, which is applied in the direction of measuring devices, using optical devices to transmit sensing components, thermometers, etc., can solve the problems of temperature sensitivity of optical fiber refractive index sensors, and achieve easy production, high sensitivity and low cost Effect

Inactive Publication Date: 2007-05-16
CHINA NAT ACAD NANOTECH & ENG
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

In addition, like other fiber optic sensors, fiber optic refractive index sensors also suffer from temperature sensitivity

Method used

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  • Fibre optic sensor for measuring temperature and refractive index of liquid contemporarily
  • Fibre optic sensor for measuring temperature and refractive index of liquid contemporarily

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Embodiment Construction

[0018] The specific implementation manners of the present invention will be described in detail below in conjunction with the accompanying drawings. As shown in Figure 1, the single-mode optical fiber 101 is a standard single-mode optical fiber (G652), the diameter of the core (105) is 8.2 μm, the diameter of the cladding (104) is 125 μm, and the numerical aperture is 0.14. First remove its protective coating, and then use a fiber optic cutter to cut its end face perpendicular to its axis. The coreless optical fiber 103 has a diameter of 125 μm, and its end face is cut perpendicular to its axis using a fiber cutter. Afterwards, the single-mode optical fiber 101 and the coreless optical fiber 103 after the end face treatment are put into an optical fiber fusion splicer to fuse the two optical fibers together. Use a fiber cutter to cut the coreless fiber at 100 mm, and fuse it with another section of single-mode fiber 101 to form a fiber-optic multi-mode interferometer as a ref...

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Abstract

This invention discloses one fiber sensor to measure liquid temperature and reflection rate, wherein, the device comprises transparent and reflection types; the transparent device comprises wide band light source with out end connected to the sensor of temperature ad reflection rate with output end connected to the wave length modulation device; the transparent fiber temperature and reflection rate sensor comprises fiber Brag grating, single mode input fiber and fiber without fiber and output fiber; the reflection device comprises fiber ring device connected to wide band source, wave length demodulator and reflection temperature and reflection rate sensor.

Description

technical field [0001] The invention relates to an optical fiber sensing device for simultaneously measuring liquid temperature and refraction index, which belongs to the technology of measuring liquid temperature and refraction index. Background technique [0002] Refractive index is an important physical parameter of fluid medium. Many properties of fluid medium, such as liquid concentration, mixture composition, specific gravity and pH value, etc., can be reflected in its refractive index. Therefore, by measuring the refractive index of a fluid, one can understand its physical and chemical properties. Therefore, the measurement of the refractive index is an effective means to analyze and study various properties of the fluid, and it is also an important method for the detection and control of various reaction processes in industrial production. There are many methods for measuring the refractive index, and the commonly used refractive index measuring instrument is the A...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01D5/353G01K11/32G01N21/41G01K11/3206
Inventor 李恩邦
Owner CHINA NAT ACAD NANOTECH & ENG
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