Device and method for measuring magnetic field(s) with...

Details Device and method for measuring magnetic field(s) with... Device and method for measuring magnetic field(s) with...

2005-05-17

2005-05-17

Patidar, Jay (Department: 2862)

Electricity: measuring and testing

Magnetic

With means to create magnetic field to test material

C324S207130, C324S202000, C324S260000

Reexamination Certificate

active

06894490

ABSTRACT:
A device for measuring magnetic field(s). The device includes at least one measurement acquisition pathway including a measurement current generator, a coil, a measurement resistor, at least one amplifier, and at least one antialiasing filter, delivering a measurement voltage. The device for measuring magnetic field(s) includes a device for determinating at least one electrical quantity representative of the acquisition pathway. The device for determining includes a mechanism for injecting a predetermined calibration current, including at least two frequency terms at at least two frequencies distinct from those of a measurement current, the calibration current being superimposed on the measurement current. The device for measuring magnetic field(s) also includes a calculation device delivering an estimate of the at least one electrical quantity at the frequency or frequencies of the measurement current.

REFERENCES:
patent: 4394831 (1983-07-01), Egli et al.
patent: 4613866 (1986-09-01), Blood
patent: 4849695 (1989-07-01), Muller et al.
patent: 5694041 (1997-12-01), Lescourret
patent: 5847976 (1998-12-01), Lescourret

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