Patent ID: 6693421
Filing Date: 2004-02-17
Classification: G01P

Abstract:
A sensor assembly for detection of changes in magnetic fields, comprising:a magnetic flux responsive device; and at least two magnets having a north pole at one end and a south pole at an opposite end, said magnetic flux responsive device substantially centered between said north pole and said south pole along a side of each said magnet; wherein each said magnet has a magnetic axis defined as a north pole at one end of said magnet axis and a south pole at an opposite end of said magnetic axis, said magnetic responsivedevice having a sensing plane wherein said magnetic flux responsive device is responsive to magnetic flux, each said magnet being configured to provide a magnetic field bias to said magnetic flux responsive device, at least one said magnet being located on each side of said magnetic flux responsive device with each said magnetic axis being substantially coplanar with said sensing plane, and said north poles of said at least two magnets being oriented in opposite directions relative to each other.