本文選題：鉑電阻非線性 + 最小二乘法��； 參考：《自動(dòng)化與儀表》2014年02期

【摘要】：盡管鉑電阻"非線性校正"有多種方法,或校正的溫區(qū)范圍不寬,或校正的計(jì)算過(guò)程頗為復(fù)雜等,通用性不強(qiáng)。這里在對(duì)鉑電阻非線性函數(shù)求逆運(yùn)算常見(jiàn)手段簡(jiǎn)要總結(jié)后,采用最小二乘法結(jié)合權(quán)函的方法,對(duì)鉑電阻正溫區(qū)按3種區(qū)段進(jìn)行了擬合運(yùn)算,得到了三次、四次多項(xiàng)式系數(shù),并給出了擬合運(yùn)算誤差分布圖。在0~650℃溫區(qū)范圍內(nèi),應(yīng)用四次多項(xiàng)式擬合運(yùn)算,最大誤差僅為0.003℃。最后簡(jiǎn)要分析了C語(yǔ)言運(yùn)算精度與實(shí)算數(shù)據(jù),進(jìn)一步證實(shí)了多項(xiàng)式直接擬合的優(yōu)越性。
[Abstract]:Although there are many methods for "nonlinear correction" of platinum resistor, either the temperature range of correction is not wide, or the calculation process of correction is rather complicated, so it is not universal.In this paper, after a brief summary of the common methods of calculating the nonlinear function inversion of platinum resistance, using the method of least square method combined with weight function, the positive temperature region of platinum resistance is fitted according to three sections, and the cubic and fourth polynomial coefficients are obtained.The error distribution map of fitting operation is also given.In the temperature range of 0 鈩，

本文編號(hào)：1772759