Electricity: measuring and testing – Magnetic – With means to create magnetic field to test material
Patent
1997-04-03
1999-06-01
Strecker, Gerard
Electricity: measuring and testing
Magnetic
With means to create magnetic field to test material
324228, 324232, G01N 2772, G01N 2790
Patent
active
059091185
ABSTRACT:
A combination of three factors for increasing the spatial resolution of a polar coordinates sensor. (1) a coefficient of coupling factor including a gap in the magnetic circuit path between the driving core and the pick-up core. (2) a tuned "tank-circuit" factor including a capacitor connected in shunt with the pick-up coil. (3) a driving frequency spectrum factor for modulating the frequency of the sine-cosine excitation to the driving core.
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