Fast high-precision temperature measurement algorithm for thermocouple

YAN Xin; WANG Xiao-na; DING Yuan-ming; YANG Sui-jun; YE Shu-liang

doi:10.13873/j.1000-9787(2015)03-0140-04

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Fast high-precision temperature measurement algorithm for thermocouple

更新时间：2025-09-11

- Fast high-precision temperature measurement algorithm for thermocouple
- Vol. 34, Issue 3, Pages: 140-143(2015)
- 作者机构：
  
  1. 中国计量学院工业与商贸计量技术研究所
  2. 浙江省计量科学研究院
- 作者简介：
- 基金信息：
- DOI：10.13873/j.1000-9787(2015)03-0140-04
  CLC： TH811
- Published：2015
- 稿件说明：
移动端阅览
[1]闫鑫,王晓娜,丁渊明,杨遂军,叶树亮.热电偶快速高精度测温算法[J].传感器与微系统,2015,34(03):140-143.

YAN Xin, WANG Xiao-na, DING Yuan-ming, et al. Fast high-precision temperature measurement algorithm for thermocouple[J]. 2015, 34(3): 140-143.
[1]闫鑫,王晓娜,丁渊明,杨遂军,叶树亮.热电偶快速高精度测温算法[J].传感器与微系统,2015,34(03):140-143. DOI： 10.13873/j.1000-9787(2015)03-0140-04.

YAN Xin, WANG Xiao-na, DING Yuan-ming, et al. Fast high-precision temperature measurement algorithm for thermocouple[J]. 2015, 34(3): 140-143. DOI： 10.13873/j.1000-9787(2015)03-0140-04.

摘要

为了满足热电偶测量温度过程中对运算速度和计算精度的要求

设计了一种快速高精度的测温算法。利用方程求根的思想

结合线性多项式拟合法与查表法

确定温度区间;同时引入秦九昭算法简化复杂分度公式;最后利用二分法精确求解。实验表明:在以ATmega128为控制核心

时钟为16MHz的硬件平台下

算法在0

000℃可以达到±0.005℃的精度

相对传统求根法

运算时间由320ms减小到80ms。

Abstract

In order to meet requirements for calculation speed and precision of operation in temperature measuring process of thermocouple

a fast and high-precision temperature measurement algorithm is designed. Use idea of Equation Root

combine linear polynomial fitting method with look-up table method to determine temperature interval; and introduces Horner algorithm to simplify complicated indexing formulas; finally

use dichotomy to solve accurately. Experiments show that on hardware platform

which uses ATmega 128 as control core with 16MHz clock

the algorithm can achieve precision of ± 0. 005 ℃ in the range of 0

1 000 ℃

and compared with traditional root finding method

computation time is reduced from 320ms to 80 ms.

关键词

Keywords

references

一种基于热电偶的温度测量的线性拟合方法 [J]. 瞿江峰. 中国西部科技 . 2010(26)

基于数值计算的热电偶测温 [J]. 吴来杰,严隽薇,刘敏. 仪表技术与传感器 . 2009(05)

方程求根法计算热电偶测量温度 [J]. 宗殿瑞,任志考,钱峰. 青岛化工学院学报(自然科学版) . 2002(02)

一种基于基本样条插值的热电偶特性曲线拟合方法 [J]. 王红萍. 仪表技术与传感器 . 2000(10)

计算方法[M]. 西安交通大学出版社 , 邓建中,刘之行[编著], 2001

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