烘丝工序物料含水率过程控制评价方法研究

Research on Assessment for Moisture Content in Output Control during Cut Tobacco Drying Process

摘要: 通过对烘丝工序出料含水率在线数据采集分布图进行分析，将整个烘丝过程分成起始、中间和结束三段分别进行研究，对起始和结束段采用曲线拟合和图形面积构筑的方法进行评价，对中间段采用过程能力指数值进行评价，最后对各段赋予权重，采用功效系数法形成总得分，从而对烘丝工序出口水分控制情况进行综合评价。通过模型验证，该功效系数得分模型结果和出料过程水分稳定性、准确性、干头干尾量高度关联，可以使用功效系数得分评价烘丝过程控制效果，代替干头干尾量和过程曲线波动大小的评价。实际应用可以起到减少评价数据量，减少检测过程人力投入，为实现自动评价创造条件。

Abstract: According to analysis the distribution map of online data acquisition for the drying procedure, it could be divided into 3 stages for researching. For the initial and end stages, the methods of curve-fitting and figure acreage building could be used while process capability index will be used in the mid-stage. Finally, each stage will be given a weight and get a total score which could be used to state a comprehensive evaluation for the moisture controlling status of drying procedure at discharge side. Through the model validation, the results of this efficiency coefficient method are high relative to the stability, accuracy and the amount of over dried tobacco of the tobacco discharging process. The score of efficiency coefficient for the controlling results of drying procedure could be used to replace the amount of over-dried tobacco and the wave of process curve. Indeed, for practical applications, less data evaluation and human resource for detection will be involved by using this method. It will create advantage qualification for realizing automatic valuation.