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1. 发明授权

US4071102A Auto zero circuit 失效
标题翻译：自动归零电路
公开(公告)号：US4071102A
公开(公告)日：1978-01-31
申请号：US727110
申请日：1976-09-27
申请人： Ron Van Ostenbridge , Michael E. Sturgeon
发明人： Ron Van Ostenbridge , Michael E. Sturgeon
IPC分类号： G01G11/00 , G01G11/04 , G01G13/14 , G01G23/14
CPC分类号： G01G11/006 , G01G11/046
摘要： Apparatus for generating a belt tare compensation signal including a load cell in operative contact with a feed conveyor belt dividable into N equal segments. The output of the load cell is strobed each time the conveyor belt advances one sampled and a pulse train representative of the output of the load cell is generated. The pulse train is applied to a pulse counter if the output of the load cell is greater than a predetermined value and is applied to a minus counter if the output of the load cell is less than a predetermined value. At the end of a single revolution of the conveyor belt, a signal representative of the difference between the count in the plus and minus counters is generated. This signal is divided by N so as to generate a belt tare compensation signal which is representative of the average output of the load cell during a single non-loaded revolution of the conveyor belt.
摘要翻译：一种用于产生皮带皮重补偿信号的装置，包括与可分成N个等分段的进给传送带可操作地接触的称重传感器。每当传送带前进一个采样时，称重传感器的输出被选通，产生代表传感器的输出的脉冲串。如果称重传感器的输出大于预定值，脉冲计数器被施加到脉冲计数器，并且如果称重传感器的输出小于预定值，则施加到减号计数器。在传送带的单次旋转结束时，产生表示正计数器和减号计数器之间的计数之间的差异的信号。该信号除以N，以产生皮带皮重补偿信号，其表示传送带单次无负载转动期间称重传感器的平均输出。

2. 发明授权

US4194649A Weigh feeder 失效
标题翻译：称重喂料器
公开(公告)号：US4194649A
公开(公告)日：1980-03-25
申请号：US803905
申请日：1977-06-06
申请人： Kenneth W. Bullivant , Ron Van Ostenbridge
发明人： Kenneth W. Bullivant , Ron Van Ostenbridge
IPC分类号： G01G11/00 , G01G11/04 , G01G13/14 , G01G23/14
CPC分类号： G01G11/006 , G01G11/046 , Y10S73/01
摘要： A digital weigh feeder includes a conveyor belt for transporting material thereon. The conveyor belt has an average tare weight. A digital weight transmitter provides at least first and second outputs having first and second frequencies respectively. The ratio of the first and second frequencies is indicative of the weight of material on the belt. A weight processor digitally computes a scaled ratio of the first and second frequencies. An auto tare circuit digitally computes the average tare weight of the conveyor belt. The computed average tare weight is substracted from the computed scaled ratio of the first and second frequencies to obtain a reading of the actual weight of material on the belt.
摘要翻译：数字式称重给料器包括用于在其上输送材料的输送带。输送带具有平均皮重。数字加权发射机分别提供具有第一和第二频率的至少第一和第二输出。第一和第二频率的比率表示皮带上材料的重量。加权处理器数字地计算第一和第二频率的缩放比例。自动皮重电路可数字计算输送带的平均皮重。计算出的平均皮重从计算的第一和第二频率的缩放比值减去，以获得皮带上材料的实际重量的读数。

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