大学物理 ›› 2014, Vol. 33 ›› Issue (7): 52-52.

• 著者文摘 • 上一篇    下一篇

动态法测金属热导率实验的优化及误差分析

刘振宇 李耀华 陈延彬   

  1. 南京大学物理学院,江苏南京210046
  • 出版日期:2014-07-25 发布日期:2014-07-20

Optimizing the dynamic measurement of thermal conductivity and error analysis

  • Online:2014-07-25 Published:2014-07-20

摘要: 基于离散傅里叶变换以及延迟定理,本文对动态法测导体热导率实验提出了新的数据处理方法,分析了这一方法的稳定性.对该实验的几个误差原因进行了讨论,包括样品的非半无限长的影响,加工误差的影响等.误差分析表明只要能减低仪器加工误差,本方法可以达到将误差降到5%以下.并根据讨论结果给出仪器设计的改进建议.

关键词: 动态法测量热导率, 傅里叶变换, 延迟定理

Abstract: A new method to calculate thermal conductivity employing Fourier transform is proposed, largely improving the original method in this experiment. The stability and error of the new method are discussed. Causes of error including the finite length of the sample, machining error are analyzed. Error analysis shows that if machining error is lowered, the total error can be kept below 5%. And suggestions to improve the experimental equipment are proposed

Key words: dynamic method of measuring thermal conductivity, Fourier transform, delay theorem

中图分类号: 

  • O482.22