【作者】 郑振耀； 曹志凯； 江青茵； 陈忠；

【Author】 Zheng Zhenyao~1 Cao Zhikai~2 Jiang Qingyin~2 Chen Zhong~1 ~1(Department of Physics, Xiamen University, Xiamen 361005, China) ~2(Department of Chemical Engineering, Xiamen University, Xiamen 361005, China)

【机构】 厦门大学物理系； 厦门大学化工系；

【摘要】 茶叶的烘焙时间控制存在的问题主要是:茶叶的含水量与烘焙时间没有建立准确的控制模型;各烘焙箱之间的连动不能统一控制;茶叶品种与烘焙时间关系没有进行记录,造成产品质量的重复性差。对传动控制系统进行技术改造;采用矢量变频器对烘焙箱传送带电动机实现无速度传感器控制;采用基于RS485总线的网络对变频器进行控制;建立烘焙箱之间的连动控制模型;建立烘焙时间与变频器给定频率之间的数学模型;工控机把控制参数自动存人数据库并完成报表打印、变频器参数设置和存储。现场应用表明该技术改造有效可行。更多还原

【Abstract】 Main problems for tea baking time control are that the control model between the moisture content of tea and the baking time was not built; baking boxes were not centralized automatically controlled; the baking time had no tracking record. It is improved upon the gearing: controlled transport electromotors based on vector control frequency converters(VCFC), controlled centralized automatically VCFC based on the RS485 bus, built a control model for baking boxes, built a mathematical model between the baking-time and the frequency of VCFC. The computer saved control parameters to the database and printed reports. The results show that the improvement is effective and feasible.更多还原