公开(公告)号：US09086315B2

公开(公告)日：2015-07-21

申请号：US13719015

申请日：2012-12-18

申请人： Mettler-Toledo AG ,  Luce Béguin

发明人： Andreas Metzger ,  Stephan Baltisberger ,  Hans-Rudolf Burkhard ,  Christophe Béguin ,  Markus Uster

IPC分类号： G01G7/04 ,  G01G23/48

CPC分类号： G01G7/04 ,  G01G23/48

摘要： A weighing cell based on the principle of electromagnetic force compensation. A permanent magnet system is mounted on a base part and includes an air gap within which is suspended a coil that is connected to a load receiver through a force-transmitting mechanism. The coil carries an electrical compensation current when the weighing cell is in operation. An optoelectronic position sensor is also included, and its signal corresponds to the deflection of the coil from a zero position which occurs as a result of placing a load on the load receiver. A closed-loop controller regulates the compensation current in response to the sensor signal in such a way that the coil and the load receiver that is connected to it are returned to their zero position by the electromagnetic force that is acting between the coil and the permanent magnet.

摘要翻译： 基于电磁力补偿原理的称重传感器。 永久磁铁系统安装在基座部分上，并且包括气隙，气隙中悬挂有通过力传递机构连接到负载接收器的线圈。 当称重单元运行时，线圈承载电气补偿电流。 还包括光电位置传感器，其信号对应于线圈从零位置的偏转，这是由于将负载放置在负载接收器上而产生的。 闭环控制器响应于传感器信号来调节补偿电流，使得线圈和与其连接的负载接收器通过作用在线圈和永久体之间的电磁力返回到其零位置 磁铁。