Weighing a number of objects in succession

Details Weighing a number of objects in succession Weighing a number of objects in succession

G - Physics

08

C

340/135.3

G08C 21/00 (2006.01) G01B 7/00 (2006.01) G01G 9/00 (2006.01)

Patent

CA 1297965

ABSTRACT OF THE DISCLOSURE The present invention provides an apparatus for sensing displacement at relatively low frequencies, comprising a linear variable differential transformer comprising a core which moves in accordance with said displacement, a primary winding, and two matched secondary windings in series; means for energizing the primary winding with a signal which varies cyclically; means for deriving from the output across the secondary windings a signal representative of said displacement which has a principal ripple component derived from the energizing signal; means for filtering said representative signal whereby said ripple component is reduced; and means for taking successive samples from the fil- tered signal always on the same point in the principal ripple component cycle, which samples are representative of said dis- placement.

613817

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