毕业设计（论文）-PT100温度测量研究精选.doc

目录 摘要·······················································（1） Abstract···················································（1） 前言·······················································（1） 第一章 PT100·············································（2） 1.1 PT100阻值与温度的关系··································（1） 1.2 PT100的各种接线方式····································（3） 第二章 ATmega16微处理器··································（4） 2.1单片微机的发展··········································（4） 2.2 AVR单片机的特点········································（4） 2.3 AVR与51、PIC单片机的比较······························（5） 2.4 ATmega16的特性·········································（5） 2.5 ATmega16引脚说明·······································（8） 第三章 实验应用··········································（11） 3.1 恒流源的设计···········································（11） 3.2 A/D转换·················································（11） 3.3 PT100温度计算数据的处理································（14） 3.4 查表方法················································（17） 第四章 结论···············································（20） 参考文献····················································（21） 致谢························································（22） PT100温度测量研究 摘 要 本文介绍了铂热电阻PT100的特性和PT100温度和阻值对应关系，采用16KB的8位AVR微控制器ATmega16协同工作。通过恒流源将采集到的信号转换成电压信号；再经过A／D转换成数字信号并由单片机系统读取；单片机系统把读取到的数字信号进行识别处理，并换算成与温度对应的数字信号，最后再由显示输出温度值 关键字： PT100 、温度测量 、单片机 Abstract This thesis introduces the features of platinum thermal resistance PT100, and the corresponding relations between temperature and resistance on PT100.During the experiment,a 8bits(16kb)AVR microcontroller ATmega 16 is used. The signal is transformed into voltage signal through a constant-current source; then the voltage signal is transformed into digital signal by A/D, and read by a singlechip system; after that, the singlechip system puts the digital signal into a recognition process, then transformed it into a digital signal which corresponds to the temperature. In the end, the temperature value