摘要
基于热敏电阻的测温方案,因其成本低、稳定性强、互换性好而得到普遍应用。然而由于其电阻-温度特性表现出强烈的非线性特点,在实际应用中常常通过查表实现,占用内存大,通用性不好。而基于对数优化的曲线拟合方法,只需离线确定拟合多项式系数即可实现对温度的精确测量。实验表明:该方法精度高、编程简单、通用性强。
The technique which used thermistance to measure temperature is widely applied for its steady parameter and low cost. The parameter table which needs more memory is frequently used to improve the measure precision. The natural logarithm optimization method is applied for polynomial curve fitting which used to fit the thermistance parameter table. Only computed four coefficient of the polynomial offline, temperature can be measured accurately. Experiment shows that this method has better performance than the old one.
出处
《仪表技术与传感器》
CSCD
北大核心
2008年第6期91-92,98,共3页
Instrument Technique and Sensor
关键词
热敏电阻
温度测量
曲线拟合
thermistance
temperature measure
polynomial curve fitting
