利用热象仪对NTC热敏电阻工作状态的观测分析  

Observation and Analysis of Thermistors in Their Working State by Thermovision

作　　者：刘英 沙磊[2] 吴宗汉[2] 

机构地区：[1]江苏兴顺电子元件公司,兴化225700 [2]东南大学物理系,南京210096

出　　处：《电子器件》2003年第2期114-121,共8页Chinese Journal of Electron Devices

摘　　要：本文阐述了首次用热象仪观测工作状态下的NTC热敏电阻基片所得的结果。基片中心处温度比边缘部分要低(电流小);基片的温度—电流间有线性关系;而且实测的电流值与拟合电流值之差值在三个不同的温区(小于80℃,大于120℃和80～120℃区间)有着明显的特点。This is the first time that the thermovision is used to observe the woking status of NTC thermistor, and the experimental result is presented in the article. According'to our chief, the temperature of the center is lower than of the edge, where the current is weaker. There is approximately a linear relationship between temperature and current.The differences of the real current and the fitted current are charaterized into three range( less than 80℃, greater than 120℃ and between 80℃ and 120℃.

关 键 词：热象仪 NTC 热敏电阻 

分 类 号：TN37[电子电信—物理电子学]