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吴立锋1，彭 珍2，杨善让3
(1.华北科技学院 电子信息工程系，北京 101601；2.华北科技学院 计算机系，北京 101601；3.东北电力大学 节能与测控技术研究中心，吉林吉林 132012)
摘要：利用热平衡理论和流体力学的知识推导的污垢热阻软测量模型，以及设计的污垢热阻在线监测装置，对监测到的污垢热阻时间序列的数据进行Logistic拟合、多项式拟合和S函数拟合的比较，得到了换热管的污垢热阻随时间变化的数学模型，并从理论上对此模型进行了探讨，验证了此模型的正确性。
关键词：软测量；污垢热阻；时间序列
Online Fouling Monitoring Technique Based on Softsensor Technology
WU Li-feng1，PENG Zhen2，YANG Shan-rang3
(1.Department of Electricity and Information，North China Institute of Science and Technology，Beijing 101601， China；2.Dept.of Computer，North China Institute of Science and Technology，Beijing 101601， China；3.Energy Conservation and Measure-Control Technique Research Center of NortheastInstitute of Electric Power Engineering，Jilin 132012，China)
Abstract：This paper deduced a soft sensor mode on fouling thermal resistance by using the thermal balance theory and fluid mechanics and designed an on-line monitoring device of fouling thermal resistance.Three functional models (Logistic，polynomial and S function model) were combined and compared in fitting the fouling thermal resistance based on the data series derived from monitoring device，so a mathematic mode that the variations of fouling thermal resistance of the transfer tube with the time was obtained.In the end，the model was theoretically discussed and demonstrated.
Key words：soft-sensor technology； fouling thermal resistance； time series | 