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邓吉华,苏西洋,张兴义*.基于EuTFC的低温荧光热成像技术的非原位标定[J].实验力学,2023,38(6):688~695
基于EuTFC的低温荧光热成像技术的非原位标定
Off-site calibration of low temperature fluorescence thermal imaging based on EuTFC
投稿时间:2023-01-17  修订日期:2023-03-14
DOI:10.7520/1001-4888-23-017
中文关键词:  EuTFC  荧光热成像  薄膜制备  非原位标定
英文关键词:EuTFC  fluorescent thermal imaging  film preparation  off-site calibration
基金项目:国家自然科学基金项目(No.11872196)
作者单位
邓吉华 1.西部灾害与环境力学教育部重点实验室 甘肃兰州 730000 2.兰州大学 土木工程与力学学院 甘肃兰州 730000 
苏西洋 1.西部灾害与环境力学教育部重点实验室 甘肃兰州 730000 2.兰州大学 土木工程与力学学院 甘肃兰州 730000 
张兴义* 1.西部灾害与环境力学教育部重点实验室 甘肃兰州 730000 2.兰州大学 土木工程与力学学院 甘肃兰州 730000 
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中文摘要:
      低温极端环境下,传统的温度测量多采用粘贴温度计的测量方法,但是这种方法面临仅能够实现点测、受电磁场环境影响显著及加载过程中易脱落等问题。本文提出了一种基于Europium tris[3-(trifluoro-methylhydroxymethylene)-(+)-camphorate] (EuTFC)的低温荧光热成像技术,该方法具有全场非接触式测量、不受电磁干扰及适用于加载过程等优势。传统的标定需要在实验过程中选择一个温度(对应于光强)作为基准,并以此为基础通过图像处理获得亮度和温度标定曲线,然而这种标定方法面临着多次实验过程难以统一的问题。为此,本文系统研究了基于EuTFC低温荧光剂的样品制作工艺,组建了一套荧光热成像测试系统,通过给出荧光的温度依赖性曲线,验证了非原位标定的可靠性并由此证实了该方法在低温变形过程中进行温度测量的可行性。
英文摘要:
      In extremely low temperature environment, the traditional method of temperature measurement is usually a stick thermometer. However, this method is faced with some problems such as point measurement, significant influence of electromagnetic field environment, and easy to fall off during loading. In this paper, a low temperature fluorescence thermal imaging technique based on Europium tris[3-(trifluoro-methylhydroxymethylene)-(+)-camphorate] (EuTFC) is proposed. The method has the advantages of full-field non-contact measurement, no electromagnetic interference, and is suitable for the loading process. It has a broad application prospect in the study of thermal characteristics of high temperature superconducting materials. The traditional calibration needs to select a temperature (corresponding to fluorescence intensity) as the benchmark in the experimental process, and on this basis, obtains the calibration curve of fluorescence intensity and temperature through image processing. However, this calibration is faced with the problem that it is difficult to unify the process of multiple experiments. Therefore, this paper systematically studied the sample production process of EuTFC low temperature fluorescent reagent, established a fluorescence thermal imaging test system, gave the fluorescence temperature dependence curve, verified the reliability of the out-of-situ calibration, and proved the feasibility of this method for temperature measurement in the process of low temperature deformation.
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