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Correction method of up-conversion fluorescence strength ratio temperature measurement technology

A technology of fluorescence intensity ratio and technology, applied in thermometer testing/calibration, thermometers, measuring devices, etc., can solve the problems of inaccurate temperature measurement results of temperature measurement technology, achieve strong anti-interference ability, improve accuracy, and good stability Effect

Active Publication Date: 2016-02-03
HARBIN INST OF TECH
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Problems solved by technology

[0005] The present invention aims to solve the problem of inaccurate temperature measurement results of the existing temperature measurement technology, and provides a correction method for the up-conversion fluorescence intensity ratio temperature measurement technology

Method used

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  • Correction method of up-conversion fluorescence strength ratio temperature measurement technology
  • Correction method of up-conversion fluorescence strength ratio temperature measurement technology
  • Correction method of up-conversion fluorescence strength ratio temperature measurement technology

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specific Embodiment approach 1

[0014] Specific Embodiment 1: In this embodiment, a correction method of up-conversion fluorescence intensity ratio temperature measurement technology is carried out according to the following steps: 1. The pulsed excitation light emitted by the 980nm diode laser is converged by a convex lens and irradiated to the sensor doped with rare earth ions. On the temperature-sensitive material, the up-converted fluorescence emitted by the temperature-sensing material doped with rare earth ions is converged and incident into the computer-controlled grating spectrometer through another convex lens, and the fluorescence spectrum collected by the computer-controlled grating spectrometer has two fluorescence emission peaks, respectively It is the fluorescence emission peak generated by the radiative transition from two adjacent and thermally coupled energy levels of rare earth ions to the lower energy level. The fluorescence wavelength emitted by the upper energy level A is shorter than the ...

specific Embodiment approach 2

[0017]Embodiment 2: This embodiment differs from Embodiment 1 in that the temperature-sensing material doped with rare earth ions is a temperature-sensing material co-doped with ytterbium ions and other rare earth ions. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0018] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: the lower energy level B radiation intensity I 1 Attenuation with double e exponential law: I 1 =C 01 exp(-t / τ 1 )+C 02 exp(-t / τ 2 ), τ 1 and τ 2 is the fitted lifetime, C 01 、C 02 To fit the weight coefficient, the fitted lifetime τ at different temperatures is obtained by double-e exponential fitting of the lower-level B fluorescence decay curves at different temperatures 1 and τ 2 ; Upper level radiation intensity I 2 The decay law with time t is three-e exponential decay: I 2 (t)=C 0 exp(-t / τ 0 )+C 1 [C 01 exp(-t / τ 3 )+C 02 exp(-t / τ 4 )], short-lived τ 0 is the energy level intrinsic lifetime, fixed τ 3 =τ 1 , τ 4 =τ 2 , C 0 、C 1 is the fitting weight coefficient; using C 01 、C 02 , τ 3 , τ 4 The three-e exponential fitting is carried out on the decay curve of the upper energy level upconversion fluorescence at different temperatures, ...

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Abstract

The invention relates to a correction method of an up-conversion fluorescence strength ratio temperature measurement technology. The objective of the invention is to solve the problem about inaccurate temperature measurement results of an existing temperature measurement technology. The method comprises that exciting light emitted by an exciting source is gathered by a convex lens and then irradiated on a temperature sensing material, up-conversion fluorescence emitted by the temperature sensing material is gathered by the convex lens and then irradiated into a spectrograph, the spectrograph is connected to a storage oscilloscope and a computer to realize data processing, a correction curve is given and finally the method is completed. The correction method provided by the invention eliminates deviations between a fluorescence strength ratio and Boltzmann distribution laws, maintains advantages of a fluorescence strength ratio method such as good resistance to interference, good stability and high sensitivity, and increases accuracy of temperature measurement. The correction method of the up-conversion fluorescence strength ratio temperature measurement technology provided by the invention is applied in the field of rare-earth fluorescence temperature measurement.

Description

technical field [0001] The invention relates to a correction method of an up-conversion fluorescence intensity ratio temperature measurement technology. Background technique [0002] In order to meet the needs of temperature measurement in some special environments in scientific research and industrial technology, fluorescent temperature sensing technology, a non-contact temperature sensing method based on the temperature dependence of the spectral properties of fluorescent materials, has attracted widespread attention and is of great importance. practical value. [0003] Fluorescence intensity ratio thermometry (FIR) is the most important application of fluorescence temperature sensing technology. Its principle is to use two adjacent excited state energy levels with thermal coupling relationship of rare earth ions to transition to a low energy level. The temperature is measured by the ratio of the fluorescence intensity emitted at the time. This temperature measurement met...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01K15/00G01K11/20
Inventor 秦峰吕茉扬张治国张云刚赵华郑仰东周圆
Owner HARBIN INST OF TECH
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