| 点热源热脉冲法测算生物流体的热物性参数 |
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| 引用本文： | 张海峰,何立群,高大勇.点热源热脉冲法测算生物流体的热物性参数[J].计量学报,2005,26(1):23-26. |
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| 作者姓名： | 张海峰 何立群 高大勇 |
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| 作者单位： | 1. 中国科学技术大学,安徽,合肥,230027
2. 中国科学技术大学,安徽,合肥,230027;美国Kentucky大学,Lexington,KY,40506 |
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| 基金项目： | 国家自然科学基金(50406013) |
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| 摘 要： | 采用微珠状热敏电阻作为点热源和测温元件，在一维点源脉冲传热模型的基础上建立一种同时测量生物流体热扩散系数、导热系数和热容的瞬态方法。运用非线性参数拟合，直接从感温热敏电阻对热脉冲温度响应中同时获取待测的热物性参数。实验中设计了一个高灵敏度的温度测量电路，测试结果表明，本方法测量误差小于4％。此外，还讨论了测量数据的处理和影响测量的因素。
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| 关 键 词： | 计量学 热敏电阻 点热源脉冲法 非线性拟合 生物流体 热物性参数 |
| 文章编号： | 1000-1158(2005)01-0023-04 |
| 修稿时间： | 2003年6月20日 |
Point Heat Pulse Method for Measuring Thermal Properties of Bio-fluids |
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| ZHANG Hai-feng,HE Li-qun,GAO Da-yong.Point Heat Pulse Method for Measuring Thermal Properties of Bio-fluids[J].Acta Metrologica Sinica,2005,26(1):23-26. |
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| Authors: | ZHANG Hai-feng HE Li-qun GAO Da-yong |
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| Affiliation: | ZHANG Hai-feng~1,HE Li-qun~1,GAO Da-yong~ |
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| Abstract: | A transient point heat pulse method, in which two tiny thermistor beads are used as point heater and temperature sensor respectively, has been developed for absolute measurement of thermal diffusivity, thermal conductivity and heat capacity of bio-fluids simultaneously. Based on the theoretical solution of the point source heat transfer, the Marquardt nonlinear fit method is used to extract thermal properties from the experimental data. An experimental system with high sensitivity for temperature is designed to perform the measurement. Experimental results of samples are in agreement with the recommended values. In addition, the way to deal with experimental data and the factors of measurement uncertainty are discussed. |
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| Keywords: | Metrology Thermistor Point heat pulse Nonlinear fit Bio-fluids Thermal properties |
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