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.
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
出处
《大学物理》
北大核心
2014年第7期52-55,共4页
College Physics
关键词
动态法测量热导率
傅里叶变换
延迟定理
dynamic method of measuring thermal conductivity
Fourier transform
delay theorem
