单片机控制的PTCR热敏电阻器阻-温特性测试系统

A Single Chip Computer Controlled R T Test System for PTCR Thermistors

介绍一种用ＭＣＳ－５１单片机控制的ＰＴＣＲ热敏电阻器阻－温特性测试系统，其中分压取样电阻器采用模拟开关进行切换。测试系统由样品室、模拟开关、Ｒ－Ｖ变换器、信号放大器、Ａ／Ｄ转换器、Ｄ／Ａ转换器、记录仪、单片机和打印机等部分组成，样品室内设有加热电炉和热电偶等部件。

The system is composed of a sample chamber, an analog switch, a R V convertor, a signal amplifier, an A/D converter, a D/A converter, a recorder, a single chip computer and a printer. The chamber is furnished with a furnace and a thermocouple. The divider resistors are controlled by the analog switch.