Temperature measurement method by using fluorescence single-peak width temperature response characteristic
A temperature-responsive, fluorescent technology that is applied in the field of fluorescent temperature sensing to achieve high sensitivity, improved sensitivity and precision, and fast response
Active Publication Date: 2021-09-24
INST OF FLUID PHYSICS CHINA ACAD OF ENG PHYSICS
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[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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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, 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 ste...
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The invention discloses a temperature measurement method by using a fluorescence single-peak width temperature response characteristic. The method comprises the following steps: step 1, cooling or heating fluorescent material; performing heat preservation at a plurality of set temperature points, and recording the temperature value of each temperature point during the heat preservation period; step 2, at each temperature point, collecting a fluorescent single peak of the fluorescent material by adopting a Raman spectrometer, and fitting and analyzing the fluorescent single peak to obtain a full width at half maximum value of the fluorescent single peak corresponding to each temperature point; step 3, establishing a half height and width temperature standard curve according to the temperature value of each temperature point and the half height and width value of the fluorescent single peak corresponding to each temperature point obtained in the step 2; step 4, placing the fluorescent material in a to-be-measured temperature field, collecting a fluorescent single peak of the fluorescent material, and fitting and analyzing the fluorescent single peak to obtain a half height and width value of the fluorescent single peak; step 5, calculating the measured value of the temperature field to be measured, and completing the measurement. According to the invention, the problem that the fluorescence intensity ratio temperature measurement technology needs to meet high sensitivity, high precision and small measurement error at the same time is solved.
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 ...
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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