拉格朗日插值法及其在热电偶热电势与温度关系中的应用  

Lagrange interpolation method and its application in the relationship between the thermoelectric potential and temperature of thermocouples

作　　者：陈旭[1] 凌彦萃 熊智淳[1] 周伟[1] Chen Xu;Ling Yancui;Xiong Zhichun;Zhou Wei(Shanghai Institute of Measurement and Testing Technology)

机构地区：[1]上海市计量测试技术研究院

出　　处：《上海计量测试》2023年第1期36-39,共4页Shanghai Measurement and Testing

摘　　要：介绍了拉格朗日插值法以及其在热电偶热电势与温度关系中的应用,该插值法解决了热电偶分度函数关系复杂以及分度表数据离散的问题。通过实例,比较了不同阶数的插值多项式和插值节点的应用,并给出了选用原则和方法。This paper introduces the Lagrange interpolation method and its application in the relationship between the thermoelectric potential and temperature of thermocouples,which solves the problems that the thermocouple functions are complex and the data of the thermocouple reference table are discrete.Through examples,the application of interpolation polynomials and interpolation nodes of different orders are compared,and the selection principles and methods are given.

关 键 词：热电偶 拉格朗日插值 温度校准仪 温控仪 

分 类 号：TH811[机械工程—仪器科学与技术]