Real time eddy current responsive hall effect device tachometer

Details Real time eddy current responsive hall effect device tachometer Real time eddy current responsive hall effect device tachometer

G - Physics

01

P

73/62

G01P 3/46 (2006.01) G01P 3/49 (2006.01)

Patent

CA 1184050

REAL TIME EDDY CURRENT RESPONSIVE HALL EFFECT DEVICE TACHOMETER Abstract A real time tachometer is realized in an electro- mechanical device having a moving member, for example a disk, of nonmagnetic electrically conductive material driven by a suitable moving device, for example a rotating shaft, the velocity of which is to be determined. An assembly of at least one permanent magnet and at least one Hall effect device is arranged for inducing eddy currents in the moving member or rotating disk and measuring them for indicating the relative velocity. The placement and electric interconnection of the Hall effect devices measure the magnetic field provided by the magnet and in an alternate embodiment incorporate compensation for runout and adverse deflection with a rotating disk.

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