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A method for high-resolution temperature field measurement using the fluorescence lifetime characteristics of quantum dots

A fluorescence lifetime and high-resolution technology, applied in thermometers, heat measurement, and measuring devices, can solve the problems of low layout density, low frequency response of thermocouples and thermal resistors, and difficulty in further improving spatial resolution, so as to achieve real-time Effects of Measurement, Sensitivity, and Accuracy Improvements

Active Publication Date: 2021-05-28
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Considering that the frequency response of thermocouples and thermal resistances is low, and the arrangement density on the surface to be measured is mostly low due to the actual situation, it is difficult to further improve the spatial resolution of the traditional temperature field measurement method.

Method used

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  • A method for high-resolution temperature field measurement using the fluorescence lifetime characteristics of quantum dots
  • A method for high-resolution temperature field measurement using the fluorescence lifetime characteristics of quantum dots

Examples

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Embodiment 1

[0023] Example 1: Real-time measurement of the temperature of the bottom surface when the droplet evaporates naturally:

[0024] (1) if figure 1 As shown, the test piece includes a copper piece 2, a quartz piece 3, an inlet transfer port 7-1, an outlet transfer port 7-2, and a CdTe quantum dot aqueous solution 1 flowing between the copper sheet 2 and the quartz sheet 3. The preparation method of the CdTe quantum dot aqueous solution is as follows: at room temperature, water-soluble CdTe and pure water are mixed at a volume ratio of 1:25, and fully shaken to obtain the CdTe quantum dot aqueous solution 1. Connect and fix the two ends of the copper sheet 2 and the quartz sheet 3 with the inlet transfer port 7-1 and the outlet transfer port 7-2 respectively, keeping a distance of 0.5 mm. Use plexiglass to seal the sides to form a cavity to obtain test specimens; figure 2 As shown, the test piece is divided into a calibration section A and a measurement section B along the flow...

Embodiment 2

[0028] Embodiment 2: Real-time measurement of the surface temperature of the chip during operation:

[0029] (1) if figure 1As shown, the test piece includes a copper piece 2, a quartz piece 3, an inlet transfer port 7-1, an outlet transfer port 7-2, and a CdSe quantum dot aqueous solution 1 flowing between the copper sheet 2 and the quartz sheet 3. The preparation method of CdSe quantum dot aqueous solution is as follows: at room temperature, water-soluble CdSe is mixed with pure water at a volume ratio of 1:30, and fully shaken to obtain CdSe quantum dot aqueous solution 1. Connect and fix the two ends of the copper sheet 2 and the quartz sheet 3 with the inlet transfer port 7-1 and the outlet transfer port 7-2 respectively, keeping a distance of 1.0 mm. Use plexiglass to seal the sides to form a cavity to obtain test specimens; figure 2 As shown, the test piece is divided into a calibration section A and a measurement section B along the flow direction of the CdSe quantu...

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Abstract

The method of realizing high-resolution temperature field measurement by using the fluorescence lifetime characteristics of quantum dots first prepares an aqueous solution of quantum dots and makes a test piece, then builds and operates a closed loop with a pump body, a calibration section and a measurement section. In the calibration section, the pulsed ultraviolet light is used to calibrate the test piece, and the database of the fluorescence lifetime of the quantum dot aqueous solution changing with temperature can be established. The surface to be tested is contacted with the measuring section, and the distribution and changes of the temperature field on the surface of the test piece are obtained through high-speed camera shooting, image analysis, database comparison and inversion calculation. The invention uses an optical method to realize real-time measurement of the temperature field, and has the advantages of high measurement accuracy, high resolution, fast frequency response and the like.

Description

technical field [0001] The invention relates to the technical field of object surface temperature measurement, in particular to a method for realizing high-resolution temperature field measurement by utilizing the fluorescence lifetime characteristics of quantum dots. Background technique [0002] The measurement of the surface temperature field has important and extensive applications in the research of microscale heat transfer phenomena, the heat dissipation design of large-scale integrated circuits, and the dynamic measurement of multiphase flow fields. [0003] The general method of surface temperature field measurement can be divided into contact measurement and non-contact measurement. Most of the contact measurement methods are: using the zeroth law of thermodynamics, a series of temperature sensing elements such as thermal resistors and thermocouples are arranged on the surface to be measured, and the measured data are processed manually or by a computer to sort out ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01K11/00
CPCG01K11/006
Inventor 张丹贾金睿王辉辉王珍珍邱斌斌
Owner XI AN JIAOTONG UNIV