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A dual-wavelength fluorescent optical fiber temperature measurement system based on europium-doped yttrium oxide phosphor

A fluorescent optical fiber and fluorescent powder technology, which is used in thermometers, thermometers, and heat measurement by physical/chemical changes. It can solve the problems of narrow detection range, high hardness, difficult powder production, and expensive fluorescent powder, and achieve the measurement temperature range. Large, low cost, small size effect

Active Publication Date: 2022-06-28
王世有
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Problems solved by technology

Although the afterglow method of fluorescence temperature measurement overcomes the problems of platinum resistance temperature measurement devices, the phosphor powder used (such as ruby, etc.) has problems such as high price, high hardness, difficulty in making powder, and narrow detection range.
[0003] Europium-doped yttrium oxide phosphor powder can produce 633nm red fluorescence with high brightness when excited by blue-green light. After sintering, it will be in powder state. The output is large and the price is cheap. Related reports on the preparation of fluorescent optical fiber temperature measurement system

Method used

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  • A dual-wavelength fluorescent optical fiber temperature measurement system based on europium-doped yttrium oxide phosphor

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Embodiment Construction

[0008] A dual-wavelength fluorescent optical fiber temperature measurement system based on europium-doped yttrium oxide fluorescent powder of the present invention is as follows: figure 1 Shown: there is a single chip 1, the single chip 1 is connected with the blue light emitting diode 3 through the first current driver 2, and the single chip 1 is connected with the green light emitting diode 5 through the second current driver 4. The first current driver 2 and the second current driver 4 are both constant current drive output devices, which ensure that the blue light emitting diode 3 and the green light emitting diode 5 output stable power. The blue light emitting diode 3 is a spherical window light emitting diode with a typical wavelength of 450 nm and a typical driving current of 50 mA, and the green light emitting diode 5 is a spherical window light emitting diode with a typical wavelength of 532 nm and a typical driving current of 35 mA. The blue light-emitting diode 3 an...

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Abstract

The invention discloses a dual-wavelength fluorescent optical fiber temperature measurement system based on europium-doped yttrium oxide fluorescent powder, which utilizes the characteristic that the ratio of the green and blue excitation efficiencies of europium-doped yttrium oxide fluorescent powder is linearly related to the temperature of the fluorescent powder itself, and uses europium-doped yttrium oxide phosphor The temperature-sensing probe (europium-doped yttrium oxide fluorescent probe) made of yttrium phosphor is a sensitive material. For occasions with high requirements on dielectric strength and strict electromagnetic environment requirements; using semi-reflectivity lenses and wavelength division filter lenses to adjust the transmission path of input and output light not only improves the integration of the system, but also prevents the returned fluorescent signal from entering the light-emitting diode , to ensure the stability of the light-emitting diodes.

Description

technical field [0001] The invention relates to the technical field of optical fiber temperature measurement, in particular to a dual-wavelength fluorescent optical fiber temperature measurement system based on europium-doped yttrium oxide fluorescent powder. Background technique [0002] At present, most of the oil-immersed transformer temperature measurement devices are based on platinum resistance or afterglow fluorescence temperature measurement. The platinum resistance temperature measuring device requires the sensor to fully contact the transformer oil and reach equilibrium after heat exchange, and then the temperature can be characterized by the change of the electrical parameters, and the response speed is slow and the work efficiency is low. Afterglow fluorescence temperature measurement is made by connecting an optical fiber to a fluorescent probe with a built-in phosphor. When the phosphor is excited by a certain wavelength of light, the excited fluorescent energy...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01K11/3213G01K11/32
CPCG01K11/3213G01K11/32
Inventor 王世有
Owner 王世有
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