Torsion type magnetic field measurement device
First Claim
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1. A miniature magnetic-field sensitive device comprising a flap;
- a support;
first and second torsion hinges on opposite sides of said flap to attach said flap to said support and defining a hinge axis of rotation for said flap;
a ferromagnetic coating on said flap and magnetized in a direction perpendicular to said axis; and
means on said support for creating a polarization field in the plane of said flap and perpendicular to its hinge axis of rotation, said polarization field magnetizing the ferromagnetic coating.
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Abstract
A device sensitive to a magnetic field (B) comprising a flap attached to a support by torsion hinges and a conductor. The conductor carries a current I and thus generates under the effect of a magnetic field a force which tends to cause the flap to turn about its hinge axis. The measurement of this rotation or of the compensation required to nullify the effect of the magnetic field (B) constitutes a measure of this magnetic field. Embodiments are disclosed having multi-turn conductors or ferromagnetic coatings instead of conductors on the flaps.
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16 Claims
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1. A miniature magnetic-field sensitive device comprising a flap;
- a support;
first and second torsion hinges on opposite sides of said flap to attach said flap to said support and defining a hinge axis of rotation for said flap;
a ferromagnetic coating on said flap and magnetized in a direction perpendicular to said axis; and
means on said support for creating a polarization field in the plane of said flap and perpendicular to its hinge axis of rotation, said polarization field magnetizing the ferromagnetic coating. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
- a support;
Specification