| 摘要 |
An electromagnetically compensating measuring apparatus, as in force measuring or weighing devices, wherein a compensation coil is wound upon a coil form movable in the air gap of a stationary permanent magnet system having a pole plate, a capacitive position sensor is connected to detect the position of the compensation coil, and an automatic volume control amplifier is series-connected to the position sensor so as to follow it, with the output of the amplifier connected to feed the compensation coil to tend to hold it in a predetermined zero position, and wherein the coil form and the pole plate each form an electrode of the position sensor.
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