摘要
分析了铝电解槽中热电偶感温特点 ,以稳态传热定律为基础 ,引入矫正系数处理暂态传热过程 .从热电偶在铝电解槽中的升温规律 ,分析推导、建立了数学模型 ,据此推算出电解质的温度 .设计制作了一种由 80 C31、81 C5 5、2 8C6 4、1 4 4 33等芯片组成的低功耗系统的铝电解槽智能测温系统 ,实现了熔融铝电解质温度测算方法 .测试结果分析表明 ,此方法测温的时间约需普通测温时间的一半 ,90 %以上的测算数据的误差小于 0 .5 % ,平均相对误差小于 0 .4 % .匀达到降低测温劳动强度 ,提高热电偶寿命的目的 .
This paper analyses the temperature-sensing features of the thermocouples in aluminum electrolyte. On the basis of the stable state heat transfer rules, and by means of the correction coefficient, a mathematical model is set up to treat the non-equilibrium state heat transfer, from which the electrolyte temperature can be deduced. This paper also introduces an intelligent temperature measurement system for aluminum production cell,which is a microcontroller system mainly made up of 80C31, 81C55, 28C64, AD521 and 3551(lcd). Experiments show that the relative error between intelligent measurement and ordinary one is less than 0.4%, and the lifetime of the thermocouple is much longer.
出处
《北方工业大学学报》
2002年第3期44-48,共5页
Journal of North China University of Technology
基金
国家自然科学基金资助项目 (No. 5 99740 0 1)
北方工业大学科研基金资助项目
关键词
铝电解
温度测量
单片机
aluminum electrolysis
temperature measurement
monolithic processor
