基于PT100铂热电阻温度传感器设计  

Design of Temperature Sensor based on Thermal Resistor of PT100

作　　者：李玉娜[1] 

机构地区：[1]广东技术师范学院

出　　处：《中国教育技术装备》2016年第16期33-35,共3页China Educational Technology & Equipment

基　　金：广州市教育局<广州塔电子创意制作>青少年科技项目(2016-280)

摘　　要：PT100铂热电阻是常见的温度测量工具,其阻值会随温度的变化而改变,被广泛应用于工业过程温度参数的测量和控制。设计基于PT100铂热电阻的温度传感器,根据周围温度的变化改变铂热电阻大小,通过电路输出对应的电压信号,加入预设值比较电路,可以将当前温度是否超出范围进行报警。Thermal resistor of PT100 is a common temperature mea-suring tool. Its resistance value is temperature-dependant. Thus it iswidely used in the measurement and control of temperature parameter in industrial processes. This essay is on the design of temperature sensor based on the thermal resistor of PT100, changing its resistance value according to temperature change of surrounding environment and outputting the corresponding voltage through electric circuits. In the design added a preset comparison circuit which can give an alarm when the temperature is out of range.

关 键 词：PT100铂热电阻 电桥 NE5532芯片 放大电路 比较电路 

分 类 号：G712[文化科学—职业技术教育学]