A Temperature Measurement Method Using Fluorescent Single Peak Width Temperature Response Characteristic

A temperature-responsive, fluorescent technology that is applied in the field of fluorescent temperature sensing to achieve the effects of high temperature measurement sensitivity, high measurement accuracy, and fast response speed

Active Publication Date: 2021-11-16
INST OF FLUID PHYSICS CHINA ACAD OF ENG PHYSICS
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Problems solved by technology

[0003] Based on the shortcomings of the existing fluorescence intensity ratio temperature measurement technology, the present invention proposes a temperature measurement method using the temperature response characteristic of the fluorescence single peak width, which solves the problem that the fluorescence intensity ratio temperature measurement technology needs to meet high sensitivity, high precision and The problem with small measurement errors

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  • A Temperature Measurement Method Using Fluorescent Single Peak Width Temperature Response Characteristic
  • A Temperature Measurement Method Using Fluorescent Single Peak Width Temperature Response Characteristic
  • A Temperature Measurement Method Using Fluorescent Single Peak Width Temperature Response Characteristic

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Embodiment 1

[0040] In this embodiment, the fluorescent material is SrB 4 o 7 :Sm 2+ , the fluorescent single peak used for temperature measurement is the 0-0 fluorescent peak, which comes from 7 D 0 - 5 F 0 Radiative transition, wavelength 685.4nm, far away from the excitation laser (514nm blue light), will not be affected by the fluctuation of the excitation light source, and the distance from the nearest neighbor fluorescent band (0-1 fluorescent band) is 4.9nm, and will not be interfered by the nearby fluorescent peak ( See figure 1 ), figure 1 The middle temperature is 298 K, 0-0 is the fluorescent single peak used for temperature measurement in this embodiment, the wavelength is 685.4nm, 0-1 is the nearest neighbor fluorescent band, and 0-2 is the second nearest neighbor fluorescent band.

[0041] In this embodiment, the temperature measurement method using the temperature response characteristic of the fluorescence single peak width is carried out according to the following...

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Abstract

The invention discloses a temperature measuring method utilizing the temperature response characteristic of fluorescent single peak width, comprising: step 1, cooling or heating the fluorescent material; keeping warm at several set temperature points, and recording the temperature of each temperature point during the keeping warm value; Step 2, at each temperature point, adopt the Raman spectrometer to collect the fluorescent single peak of the fluorescent material, fit and analyze the fluorescent single peak, and obtain the FWHM value of the fluorescent single peak corresponding to each temperature point; Step 3, According to the temperature value of each temperature point and the FWHM value of the fluorescent single peak corresponding to each temperature point obtained in step 2, establish a half-maximum temperature standard curve; Step 4, place the fluorescent material in the temperature field to be measured, and collect its Fluorescence single peak, fitting and analyzing the fluorescence single peak to obtain the FWHM value of the fluorescence single peak; step 5, calculating the measured value of the temperature field to be measured, and the measurement is completed. The invention solves the problem that the fluorescence intensity ratio temperature measurement technology needs to satisfy high sensitivity, high precision and small measurement error at the same time.

Description

technical field [0001] The invention belongs to fluorescent temperature sensing technology, in particular to a temperature measurement method utilizing the temperature response characteristic of fluorescent single-peak width. Background technique [0002] Fluorescence temperature sensing technology is a measurement method based on the temperature response mechanism of fluorescence characteristics. It has the characteristics of non-contact, stability, precision, etc., and has high sensitivity in the medium and low temperature range. It occupies a leading position in point temperature measurement technology. Fluorescence temperature measurement technology based on the combination of fluorescence technology and optical fiber sensing technology is one of the most active research and development fields, and has important application value in scientific research and industrial production. The relative density of two adjacent excited state energy levels of the fluorescent material ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01K11/324
CPCG01K11/324
Inventor 敬秋民张毅何强陈小辉柳雷李守瑞高俊杰耿华运李俊
Owner INST OF FLUID PHYSICS CHINA ACAD OF ENG PHYSICS
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