基于C8051F410片上系统热偶校验仪的设计  

Design of the thermocouple calibrator based on System-on-chip C8051F410

作　　者：王影[1] 张莉[1] 刘麒[1] 

机构地区：[1]吉林化工学院信息与控制工程学院,吉林吉林132022

出　　处：《吉林化工学院学报》2011年第11期87-90,共4页Journal of Jilin Institute of Chemical Technology

摘　　要：介绍基于C8051F410片上系统设计热偶校验仪的方法.给出了使用双路12位电流输出型D/A实现15位分辨率D/A转换的硬件电路,与辅助信号处理电路一起产生精密直流毫伏信号,通过软件处理能够产生与预设的测量温度和冷端温度对应的模拟热偶用的毫伏信号,代替标准热偶用于测温仪表的校验.该方法的应用可以代替管式加热炉热偶校验系统,有效降低校验过程的能耗.The thermocouple calibrator based on C8051F410 is designed in this paper. The double channel currentoutput type D/A conversion with 12 bits resolution is employed to implement hardware circuit of the D/A conversion with 15 bits resolution. And then the auxiliary signal processing circuit produces the accurate DC millivolt signal,which can be processed by software to produce the analogue thermocouple millivoh signal corresponding with the pre-set measured temperature and cold-end temperature. Instead of standard thermocoupie, it can perform the calibration for temperature measurement instrument. The application of this method can replace the pipe furnace therulocouple calibration system, reduce energy consumption effectively.

关 键 词：C8051F410 毫伏信号 分辨率 校验仪 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]