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1. 发明授权

US4524886A Apparatus and method for improving the accuracy of a loss-in-weight feeding system 失效
公开(公告)号：US4524886A
公开(公告)日：1985-06-25
申请号：US343143
申请日：1982-01-28
申请人： David H. Wilson , James M. Loe
发明人： David H. Wilson , James M. Loe
IPC分类号： B65G65/40 , B65G47/19 , G01G11/08 , G01G11/16 , G01G13/08
CPC分类号： G01G13/08 , B65G47/19 , G01G11/08 , G01G11/16
摘要： A control for loss-in-weight feeders which decreases flow error during refill of the feeder hopper. The weight range (empty to full capacity) of the hopper is divided into weight increments. Samples are taken of the hopper weight during discharge and refill, and each sample is assigned to a weight increment. During discharge, a scale factor related to the density of material in the hopper is computed, assigned to a weight increment and stored in memory; and the hopper feed screw is driven at a speed proportional to the computed scale factor. During refill, the stored scale factors are retrieved from memory and the hopper feed screw is driven at a speed proportional to the stored scale factors; but no additional scale factors are calculated.

2. 发明授权

US4635819A Apparatus and method for improving the accuracy of a loss-in-weight feeding system 失效
标题翻译：用于提高重量损失输送系统精度的装置和方法
公开(公告)号：US4635819A
公开(公告)日：1987-01-13
申请号：US713749
申请日：1985-03-19
申请人： David H. Wilson , James M. Loe
发明人： David H. Wilson , James M. Loe
IPC分类号： B65G47/19 , G01G11/08 , G01G11/16 , G01G13/08
CPC分类号： G01G13/08 , B65G47/19 , G01G11/08 , G01G11/16
摘要： A control for loss-in-weight feeders which decreases flow error during refill of the feeder hopper. The weight range (empty to full capacity) of the hopper is divided into weight increments. Samples are taken of the hopper weight during discharge and refill, and each sample is assigned to a weight increment. During discharge, a scale factor related to the density of material in the hopper is computed, assigned to a weight increment and stored in memory; and the hopper feed screw is driven at a speed proportional to the computed scale factor. During refill, the stored scale factors are retrieved from memory and the hopper feed screw is driven at a speed proportional to the stored scale factors; but no additional scale factors are calculated.
摘要翻译：减重进料器的控制，减少进料斗重新填充时的流量误差。料斗的重量范围（空到满容量）分为重量增量。在排出和再填充期间取样料斗的重量，并将每个样品分配给加重量。在放电期间，计算与料斗中材料密度相关的比例因子，分配给加权增量并存储在存储器中; 并且料斗进给螺杆以与所计算的比例因子成正比的速度被驱动。在补充期间，存储的比例因子从存储器中取出，料斗进料螺杆以与存储的比例因子成比例的速度被驱动; 但不计算额外的比例因子。

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