公开(公告)号：US3840025A

公开(公告)日：1974-10-08

申请号：US28011572

申请日：1972-08-14

Applicant: INDUSTRIAL NUCLEONICS CORP

Inventor： KOENIG D ,  FOWLER R ,  FREEH E

IPC: A24B3/04 ,  A24B9/00

CPC classification number: A24B3/04

Abstract: The amount of moisture removed by a dryer from a stream of tobacco formed by mixing a supply of cut rolled stems with a supply of laminae is controlled. Gauge means respond to the cut rolled stems and laminae fed to the dryer to derive signals respectively indicative of the moisture of the cut rolled stems and laminae. The signals indicative of the cut rolled stems and laminae moisture are processed with a set point signal for the moisture of tobacco after emerging from the dryer to derive a feed forward component of a set point signal for the dryer drying rate. The cut rolled stem and laminae moisture indicating signals are processed differently from each other, as a function of the relative ability of the dryer to remove moisture from the cut rolled stems and laminae. A feed back component of the dryer drying rate set point signal is derived from a proportionalintegral controller responsive to the moisture indication of the dried tobacco.

Abstract translation: 通过干燥器从通过将切割的轧制茎的供应与供应的薄片混合形成的烟草流除去的水分的量被控制。 量表意味着响应于被送入干燥器的切割的卷轴和层，以得出分别表示切割的轧制茎和层的水分的信号。 指示切割的轧制杆和层状水分的信号用来自干燥器出来的烟草湿度的设定点信号进行处理，以获得用于干燥器干燥速率的设定点信号的前馈分量。 根据干燥机从切割的轧制茎和薄层中除去水分的相对能力的函数，切割的轧制茎和层状水分指示信号被彼此不同地加工。 干燥器干燥速度设定点信号的反馈部件来自响应于干燥烟草的湿度指示的比例积分控制器。

公开(公告)号：US3787985A

公开(公告)日：1974-01-29

申请号：US3787985D

申请日：1972-08-14

Applicant: INDUSTRIAL NUCLEONICS CORP

Inventor： FOWLER R ,  FREEH E ,  KOENIG D

IPC: A24B3/04 ,  F26B21/10 ,  F26B25/22 ,  A24B9/00 ,  F26B3/02 ,  F26B17/32

CPC classification number: A24B3/04 ,  F26B21/10 ,  F26B25/22

Abstract: Moisture in tobacco flowing through a dryer is controlled so that it is maintained substantially at a desired amount during start up and shut down trasitional periods of the tobacco flow through the dryer. Trajectories for the dryer drying rate during the start up and shut down periods are provided in a computer memory. During start up, an indication of the moisture and flow rate of the tobacco flowing into the dryer is derived to enable the amount of moisture expected to be removed by the dryer (dryer duty) to be calculated. When shut down commences the temperature of the dryer is derived and stored in the memory. During start up, the trajectory and dryer duty are time weighted so that a weighting factor for the trajectory decreases as the transitional period progresses and a weighting factor for the dryer duty increases as the period progresses and the two time weighted indications are combined to control the dryer drying rate. During shut down, the shut down trajectory and stored drying rate indication are time weighted so that a weighting factor for the trajectory increases as the period progresses and a weighting factor for the drying rate indication decreases as the period progresses and the two time weighted indications are combined to control the drying rate of the dryer.

Abstract translation: 控制通过干燥器流动的烟草中的水分，使其在启动和关闭通过干燥器的烟草流动的传统时段期间基本维持在期望的量。 在计算机存储器中提供了在启动和关闭期间的干燥器干燥速率的轨迹。 在启动期间，导出流入干燥器的烟草的水分和流速的指示，以使得能够计算出由干燥器（干燥器占空比）预期去除的水分量。 当关机开始时，干燥器的温度被导出并存储在存储器中。 在启动过程中，轨迹和干燥器占空比是时间加权的，因此轨迹的加权因子随着过渡期的进行而减小，干燥器的加权因子随时间的推移而增加，两个时间加权指示被组合以控制 烘干机干燥速度。 在关闭期间，关闭轨迹和存储的干燥速率指示是时间加权的，使得轨迹的加权因子随着周期的进行而增加，并且干燥速率指示的加权因子随着时间的推移而减小，两个时间加权指示是 组合以控制干燥器的干燥速率。