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Correction method for down-conversion fluorescence intensity ratio temperature measurement technology

A technology of fluorescence intensity ratio and technology, applied in thermometers, measuring devices, measuring heat and other directions, can solve the problems of inaccurate temperature measurement results of temperature measurement technology, and achieve the effect of strong anti-interference ability, improved accuracy and good stability

Active Publication Date: 2016-04-06
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 down-conversion fluorescence intensity ratio temperature measurement technology

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  • Correction method for down-conversion fluorescence intensity ratio temperature measurement technology
  • Correction method for down-conversion fluorescence intensity ratio temperature measurement technology
  • Correction method for down-conversion fluorescence intensity ratio temperature measurement technology

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specific Embodiment approach 1

[0017] Specific Embodiment 1: In this embodiment, a correction method for down-conversion fluorescence intensity ratio temperature measurement technology is carried out according to the following steps: 1. The pulsed excitation light emitted by the excitation source is converged by a convex lens and irradiated onto the temperature-sensitive temperature sensor doped with rare earth ions. On the material, the down-converted fluorescence emitted by the temperature-sensing material doped with rare earth ions is converged 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 Fluorescent emission peaks produced 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 wavel...

specific Embodiment approach 2

[0020] Embodiment 2: This embodiment differs from Embodiment 1 in that: the excitation source is a 405nm light-emitting diode. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0021] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is that the temperature-sensing material doped with rare earth ions is Eu 3+ Doped with temperature-sensitive materials. Others are the same as in the first or second embodiment.

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Abstract

The invention relates to a correction method for the down-conversion fluorescence intensity ratio temperature measurement technology and solves a problem of inaccurate temperature measurement results existing in the temperature measurement technology in the prior art. The method comprises steps that, excitation light emitted by an excitation source is gathered through a convex lens and irradiates to a temperature-sensitive material, down-conversion fluorescence emitted through the temperature-sensitive material is gathered through the convex lens and enters a spectrometer, the spectrometer is connected with a storage oscilloscope and a computer for data processing, and a correction curve is acquired. Through the correction method, deviation of the down-conversion fluorescence intensity ratio and the Boltzmann distributing law in the prior art is eliminated, advantages of strong anti-interference capability, good stability and high sensitivity of the fluorescence intensity ratio method are kept, and temperature measurement accuracy is further improved. The correction method is applied to the rare earth fluorescence temperature measurement field.

Description

technical field [0001] The invention relates to a correction method of down-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 meth...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01K11/00
CPCG01K11/00
Inventor 秦峰吕茉扬张云刚赵华郑仰东张治国
Owner HARBIN INST OF TECH
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