工业控制计算机
工業控製計算機
공업공제계산궤
Industrial Control Computer
2015年
10期
121-122
,共2页
南林%王智勇%卫莹%牛婷婷
南林%王智勇%衛瑩%牛婷婷
남림%왕지용%위형%우정정
最小二乘法%多项式拟合%误差分析
最小二乘法%多項式擬閤%誤差分析
최소이승법%다항식의합%오차분석
least square method%polynomial fitting%error analysis
WEe5/26热电偶的热电势与温度之间的关系存在严重非线性,如果做普通的线性拟合,那么会给测量值带来很大误差,必须进行多项式拟合.根据WEe5/26分度表上0,100,200,…,2200,2300℃对应的热电势值,利用最小二乘法对WEe5/26热电偶热电势与温度之间的关系进行多项式拟合,给出3、5、7、9阶的多项式,并进行了拟合误差分析.
WEe5/26熱電偶的熱電勢與溫度之間的關繫存在嚴重非線性,如果做普通的線性擬閤,那麽會給測量值帶來很大誤差,必鬚進行多項式擬閤.根據WEe5/26分度錶上0,100,200,…,2200,2300℃對應的熱電勢值,利用最小二乘法對WEe5/26熱電偶熱電勢與溫度之間的關繫進行多項式擬閤,給齣3、5、7、9階的多項式,併進行瞭擬閤誤差分析.
WEe5/26열전우적열전세여온도지간적관계존재엄중비선성,여과주보통적선성의합,나요회급측량치대래흔대오차,필수진행다항식의합.근거WEe5/26분도표상0,100,200,…,2200,2300℃대응적열전세치,이용최소이승법대WEe5/26열전우열전세여온도지간적관계진행다항식의합,급출3、5、7、9계적다항식,병진행료의합오차분석.
The relationship between thermoelectric potential and temperature of the WEe5/26 thermocouple is highly non-linear.The ordinary linear fitting brings great error to the measured value.So polynomial fitting must be done.In this paper,ac-cording to the temperature which is 0,100,200, …,2200~2300℃ and the corresponding thermoelectric potential in the WEe5/26 indexing table,the polynomial fitting is done between thermoelectric potential and temperature of the WEe5/26 thermo-couple using the least square method.Then the polynomials of three,five,seven and nine degree are given.
