宽温范围测量时NTC热敏电阻器R/T数学模型  

R/T mathematic model of NTC thermistor for wide-temperature-range measuring

作　　者：李兵尚[1] 施建礼[1] 吴非 李冠军 

机构地区：[1]海军潜艇学院三系,山东青岛266042 [2]海军驻沈阳军事代表室,辽宁沈阳110045 [3]东海舰队19分队,浙江宁波315122

出　　处：《传感器与微系统》2012年第6期53-55,共3页Transducer and Microsystem Technologies

摘　　要：NTC型热敏电阻器使用寿命长,具有很高的灵敏度,进行宽温度范围测量而又要求较高的精度时,R/T的非线性数学模型难以描述。基于最小二乘法的多项式逼近原理,以LNTT502FW热敏电阻器为实例,分段拟合出传感器在(-20～80℃)使用环境下的数学模型,拟和数据相对误差较小,能满足测量要求。NTC thermistor has long life and high sensitivity.When wide-temperature-range measuring with high precision,it is hard to be described by the nonlinear mathematic model of R/T.Based on the principles of polynomical approximation of least square method,a piecewise fitting mathematic model of thermistor LNTT502FW is approached.And it meets the measurement requirements well with small relative data-fitting error.

关 键 词：宽温范围 NTC热敏电阻器 R/T 数学模型 

分 类 号：TM54[电气工程—电器]