Electricity: measuring and testing – Magnetic – Magnetometers
Reexamination Certificate
2005-02-08
2005-02-08
Deb, Anjan (Department: 2862)
Electricity: measuring and testing
Magnetic
Magnetometers
C324S244000, C324S249000, C324S260000
Reexamination Certificate
active
06853186
ABSTRACT:
A magnetic field sensor relies on variations in permeability of magnetic material to detect an external field. An exemplary magnetic field sensor includes a magnetic material and two or more conductors, at least one of which is connected to an electrical energy source. Current flowing through at least one of the conductors establishes a magnetic field in die magnetic material at a magnitude at which there is a generally linear relationship between the magnetic field and the permeability of the material. An external field to be sensed influences the permeability of the material. Sensing variations in the permeability of the magnetic material allows the external magnetic field to be sensed. Preferably, the conductors are mutually coupled and exhibit a mutual inductance between each other so that detectable changes in the current distribution between the conductors caused by an external magnetic field may be detected while the net current flowing in the conductors remains sufficient to maintain a magnetic field of sufficient magnitude in the material.
REFERENCES:
patent: 3239754 (1966-03-01), Odom, Jr. et al.
patent: 3421075 (1969-01-01), Belson
patent: 5020538 (1991-06-01), Morgan et al.
patent: 5323777 (1994-06-01), Ahonen et al.
patent: 5365391 (1994-11-01), Sugiyama et al.
patent: 5705926 (1998-01-01), Senda et al.
patent: 5757184 (1998-05-01), Kurihara et al.
patent: 5838154 (1998-11-01), Morikawa et al.
patent: 5885215 (1999-03-01), Dossel et al.
patent: 6069475 (2000-05-01), Isomura et al.
patent: 6194897 (2001-02-01), Fukunaga
patent: 6304083 (2001-10-01), Owens
patent: 6356079 (2002-03-01), Mizoguchi et al.
patent: 6414564 (2002-07-01), Mizoguchi et al.
Deb Anjan
Dinsmore & Shohl LLP
Kinder Darrell
National University of Singapore
LandOfFree
Variable permeability magnetic field sensor and method does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Variable permeability magnetic field sensor and method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Variable permeability magnetic field sensor and method will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3493865