| 动态测量过程热电偶时间常数模型研究 |
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| 引用本文： | 刘冠麟,鄂加强,罗庆波.动态测量过程热电偶时间常数模型研究[J].湖南农机,2011,38(3):70-72. |
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| 作者姓名： | 刘冠麟 鄂加强 罗庆波 |
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| 作者单位： | 1. 湖南大学机械与运载工程学院,湖南长沙,410082;湖南长丰动力有限公司,湖南长沙,410100
2. 湖南大学机械与运载工程学院,湖南长沙,410082 |
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| 基金项目： | 中央高校基本科研业务费专项资金重点基础理论项目资助 |
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| 摘 要： | 根据热电偶动态测温过程实际换热情况,运用对流、辐射和传导等传热学有关知识,建立了热电偶时间常数数学模型.以制作热电偶最常用的3种金属-镍、铂和钨为例进行的动态测量过程热电偶时间常数特性分析结果表明,动态测量过程中热电偶时间常数应该在不同的介质温度区间相应地选取不同的换热比重.应用结果表明,采用动态测量过程热电偶时间常数...
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| 关 键 词： | 热电偶 时间常数 辐射 |
Study on Time-constant Mathematics Model of Thermoelement in the Process of Dynamic Measurement |
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| LIU Guan-lin,E Jia-qiang,LUO Qing-bo.Study on Time-constant Mathematics Model of Thermoelement in the Process of Dynamic Measurement[J].Hunnan Agricultural Machinery,2011,38(3):70-72. |
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| Authors: | LIU Guan-lin E Jia-qiang LUO Qing-bo |
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| Institution: | 1(1.College of Mechanical and Vehicle Engineering,Hunan University,Changsha,Hunan 410082,China;2.Hunan Changfeng Powertrain Co.,Ltd,Changsha,Hunan 410100,China) |
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| Abstract: | Based on the actual condition of heat transfer in the process of thermoelement dynamic thermometric,a thermoelement time-constant mathematical model was built by applying heat transfer theory such as convection,radiation and conduction.The property analysis on dynamic measurement was carried out by taking three most commonly used metals in thermoelement-making as its example—nickel,platinum and tungsten.According to the results of analysis of thermoelement time-constant,time-constant of the thermoelement should choose different proportions of heat transfer at different medium temperature correspondingly.The application results indicate that the relative error of the thermoelement can reduce by 4.0% after dynamic measurement being revised by using of the thermoelement time-constant model in the process of dynamic thermometric. |
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| Keywords: | Thermoelement Time-constant Radiation Convection Conduction |
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