Fluorescence intensity ratio temperature measurement method based on mixed temperature sensing material

A fluorescence intensity ratio and fluorescence band technology, applied in the field of fluorescence intensity ratio temperature measurement, can solve the problems of high sensitivity and low uncertainty, and achieve the effect of short response time, good repeatability, and changing temperature measurement range.

Active Publication Date: 2019-08-20
HARBIN INST OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0012] The purpose of the present invention is to solve the problem that the temperature measurement method in the high temperature range cannot have both high sensitivity and low uncertainty, and to provide a method based on the fluorescence intensity ratio temperature measurement method of mixed temperature-sensing materials

Method used

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  • Fluorescence intensity ratio temperature measurement method based on mixed temperature sensing material
  • Fluorescence intensity ratio temperature measurement method based on mixed temperature sensing material
  • Fluorescence intensity ratio temperature measurement method based on mixed temperature sensing material

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specific Embodiment approach 1

[0027] Specific embodiment one: In this embodiment, a method for measuring temperature based on the fluorescence intensity ratio of a mixed temperature-sensitive material is carried out according to the following steps:

[0028] One, the Eu 3+ : AVO 4 with Cr 3+ :Al 2 o 3 Mix to obtain a temperature-sensitive material;

[0029] 2. Put the temperature-sensitive material into the hot and cold stage, use the near-ultraviolet light emitted by the 405nm laser as the excitation light source, and use the integral intensity ratio of the two fluorescent bands of 618nm and 694nm to perform temperature calibration in the temperature range of 543 to 673K, and obtain Temperature calibration curve;

[0030] 3. Place the temperature-sensing material in the environment to be measured, and use the temperature calibration curve to measure the temperature to be measured, that is, complete the temperature measurement method.

[0031] The Eu selected in this embodiment 3+ : AVO 4 / Cr 3+ :...

specific Embodiment approach 2

[0032] Specific embodiment two: the difference between this embodiment and specific embodiment one is: in step one, Eu 3+ : AVO 4 and Cr 3+ :Al 2 o 3 The preparation methods are all high-temperature solid-phase methods. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0033] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: in step one, Eu 3+ : AVO 4 with Cr 3+ :Al 2 o 3 Grind into powder, then mix and press into tablets to obtain the temperature-sensitive material. Others are the same as in the first or second embodiment.

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Abstract

The invention provides a fluorescence intensity ratio temperature measurement method based on a mixed temperature sensing material. The invention relates to the fluorescence intensity ratio temperature measurement method based on the mixed temperature sensing material. The purpose of the invention is to solve the problem that a temperature measurement method in a high temperature range cannot haveboth high sensitivity and low uncertainty. The method comprises the steps that (1) an Eu3+: AVO4 and Cr3+: Al2O3 mixed material is used as the temperature sensing material; and (2) in the temperaturerange of 543 to 673K, the fluorescence intensity ratio I618 / I694 gradually increases with temperature, has a monotonic function relationship with temperature T, and can be fitted by a polynomial, sothat the temperature can be measured by monitoring the fluorescence intensity ratio. The temperature measurement method provided by the invention has the advantages of good repeatability, high sensitivity and low uncertainty, and is applied to the field of rare earth fluorescence temperature measurement.

Description

technical field [0001] The invention relates to a temperature measurement method based on the fluorescence intensity ratio of a mixed temperature-sensing material. Background technique [0002] In order to meet the needs of temperature measurement in certain environments in scientific research and industrial production, fluorescent temperature sensing technology, a temperature measurement method based on fluorescent materials, has important application value, which can realize non-contact, long-term, stable and stable temperature measurement. Accurate temperature measurement. [0003] Fluorescence Intensity Ratio Thermometry (FIR) is the most widely used fluorescent temperature sensing technology. This method utilizes two adjacent thermally coupled energy levels of excited rare earth ions to emit when they transition to a low energy level. The ratio of the fluorescence intensity to measure temperature, using this ratio method to measure temperature has the advantages of ant...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01K11/32
CPCG01K11/3213
Inventor 张治国周圆
Owner HARBIN INST OF TECH
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