基于分段最小二乘法的Pt100三线制温度检测  

Pt100 three-wire temperature detection based on segmented least squares

作　　者：尹春杰[1,3] 宋其征 赵丽萍 赵云龙 YIN Chunjie;SONG Qizheng;ZHAO Liping;ZHAO Yunlong(School of Information and Electrical Engineering,Shandong Jianzhu University,Jinan 250100,China;School of Materials Science and Engineering,Shandong Jianzhu University,Jinan 250100,China;School of Mechanical and Electrical Engineering,Weifang Vocational College,Weifang 261000,China;School of Intelligent Manufacturing,Qingdao Huanghai University,Qingdao 266400,China)

机构地区：[1]山东建筑大学信息与电气工程学院,山东省济南市250100 [2]山东建筑大学材料科学与工程学院,山东省济南市250100 [3]潍坊职业学院机电工程学院,山东省潍坊市261000 [4]青岛黄海学院智能制造学院,山东省青岛市266400

出　　处：《农业装备与车辆工程》2023年第6期127-130,共4页Agricultural Equipment & Vehicle Engineering

摘　　要：阐述了常用温度传感器及检测方法,对Pt100铂电阻的阻值-温度特性进行分析,设计了精度高、成本低的Pt100铂电阻三线制桥式检测电路;针对铂电阻阻值-温度曲线的非线性特征,采用分段式最小二乘法实现了线性拟合,减少随机干扰等因素的影响。结果表明,检测电路最大测温误差±0.13℃,满足测温要求且具有良好经济性。This paper expounds the common temperature sensor and detection methods,analyzes the resistance-temperature characteristics of Pt100 platinum resistance,designs a high-precision,low-cost Pt100 platinum resistance three-wire bridge detection circuit;and for the nonlinear characteristics of platinum resistance value-temperature curve,the segmented least squares method is used to achieve linear fitting,reducing the influence of random interference and other factors.The results show that the maximum temperature measurement error is±0.13°C,which meets the temperature measurement requirements and has good economy.

关 键 词：PT100 三线制 最小二乘法 非线性校正 温度检测 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]