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A Fluorescence Intensity Ratio Temperature Measurement Method Based on Mixed Temperature Sensing Materials

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, high temperature measurement sensitivity and prolonged response time.

Active Publication Date: 2021-12-17
HARBIN INST OF TECH
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  • Summary
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  • 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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  • A Fluorescence Intensity Ratio Temperature Measurement Method Based on Mixed Temperature Sensing Materials
  • A Fluorescence Intensity Ratio Temperature Measurement Method Based on Mixed Temperature Sensing Materials
  • A Fluorescence Intensity Ratio Temperature Measurement Method Based on Mixed Temperature Sensing Materials

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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

A temperature measurement method based on the ratio of fluorescence intensity of mixed temperature-sensing materials, the invention relates to a method of temperature measurement based on ratio of fluorescence intensity of mixed temperature-sensing materials. The purpose of the invention is to solve the problem that the temperature measurement method in the high temperature range cannot have high sensitivity and low uncertainty. Method: (1) with Eu 3+ : AVO 4 with Cr 3+ :Al 2 o 3 The mixed material is a temperature-sensitive material; (2) in the temperature range of 543 to 673K, the fluorescence intensity ratio I 618 / I 694 As the temperature increases, it gradually increases, and there is a monotonous functional relationship with the temperature T, which can be fitted by a polynomial, and the purpose of temperature measurement can be achieved by monitoring the fluorescence intensity ratio. The temperature measuring method of the invention has good repeatability, high sensitivity and low uncertainty. The invention 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 Patents(China)
IPC IPC(8): G01K11/32
CPCG01K11/3213
Inventor 张治国周圆
Owner HARBIN INST OF TECH
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