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1. 发明授权

US4040496A Automatic weighing machines 失效
标题翻译：自动称重机
公开(公告)号：US4040496A
公开(公告)日：1977-08-09
申请号：US584842
申请日：1975-06-09
申请人： Thomas William Wilson , Michael Johnston Topham
发明人： Thomas William Wilson , Michael Johnston Topham
IPC分类号： G01G19/30 , G01G13/285 , G01G13/29 , G01G13/295 , G01G19/22 , G01G19/38 , G01G13/04
CPC分类号： G01G13/2912 , G01G13/2851 , G01G13/2852 , G01G13/2951 , G01G19/22 , G01G19/38
摘要： The invention provides an automatic weighing machine for weighing out a predetermined quantity of fluid materials into a container. The machine includes a fluid material valve of the downward delivery type comprising a closure member having a plurality of selectable positions corresponding to different flow rates through the valve. A weighing control system is adapted to control the valve so as to dispense an appropriate weight of fluid material into the container in accordance with a predetermined program. The control system comprises one or more load cells arranged to provide an electrical output dependent upon the weight of the container plus its contents, and a comparator for comparing the signal from the load cell or cells with a predetermined target weight to be achieved in accordance with the program whereby to provide an electrical error signal instantaneously representative of the additional weight of fluid material to be dispensed. A control means sequentially adjusts the valve to lower flow rate positions in dependence upon both the magnitude of the error and the rate of change of the error.
摘要翻译：本发明提供了一种用于将预定量的流体材料称量到容器中的自动称重机。该机器包括向下传送类型的流体材料阀，包括具有对应于通过阀的不同流速的多个可选位置的封闭构件。称重控制系统适于控制阀，以便根据预定的程序将适当重量的流体材料分配到容器中。控制系统包括一个或多个称重传感器，其被布置为根据容器的重量及其内容提供电输出;以及比较器，用于将来自称重传感器的信号与预定的目标重量进行比较，以根据提供瞬时代表要分配的流体材料的附加重量的电气误差信号的程序。控制装置根据误差的大小和误差的变化率依次调节阀门以降低流量位置。

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