摘要
结合氧化锆元件测量氧含量的原理,从HART协议智能变送器的功能和协议要求出发,在分析应用氧化锆元件精确测氧的条件基础上,设计了一种基于HART总线的新型智能氧量分析仪;该仪表以STC11F32XE单片机为控制核心,应用A5191和AD421构成HART模块,为适应各现场工况,采用模糊PID算法,实现氧化锆探头加热炉的恒温控制,提高了测量精度;经现场长时间运行表明,能很好的将炉温控制在750℃±1℃,氧含量测量误差控制在0.1%O2内,运行稳定可靠,达到设计要求。
Considering the principle of measuring oxygen content with zirconium oxide component,a new intelligent oxygen analyzer based on HART bus is designed.The research begins with the function and protocol of intelligent transmitter complied with HART protocol,and bases on the condition of analyzing the application of zirconium oxide components.Using STC11F32XE as the control core and A5191 AD421 as HART module,this instrument use fuzzy PID algorithm to achieve constant temperature control of zirconia probe furnace,and improve the measurement accuracy under various site conditions.After long time running,this instrument can keep the furnace temperature at 750℃±1℃ and the oxygen content measuring error under 0.1%O2,which show that the instrument runs stably and reliably to meet the design requirements.
出处
《计算机测量与控制》
CSCD
北大核心
2010年第11期2671-2674,共4页
Computer Measurement &Control
基金
江苏省自然科学基金项目资助(BK2008188)
