Magnetic permeability measurement of ferromagnetic wires
AssigneeThe Boeing Company
InventorsJohn R. Hull, Robert James Miller
Life of this patent
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Abstract
Embodiments described herein provide magnetic permeability measurements of ferromagnetic wires. In one embodiment, an apparatus comprises a non-magnetic wire retainer having a circular groove that holds a ferromagnetic wire for measurement. The apparatus further comprises a magnetic field generator proximate to the non-magnetic wire retainer that provides a substantially uniform magnetic field along a circumference of the circular groove. The apparatus further comprises a force sensor mechanically coupled to the magnetic field generator that measures an attractive force between the magnetic field generator and the ferromagnetic wire for determining the magnetic permeability of the ferromagnetic wire.
Claims10
An apparatus for measuring a magnetic permeability of a ferromagnetic wire, the apparatus comprising:
- a non-magnetic wire retainer having a circular groove that is configured to retain the ferromagnetic wire for measurement;
- a permanent magnet that is proximate to the non-magnetic wire retainer that is configured to provide a substantially uniform magnetic field along a circumference of the circular groove, wherein the permanent magnet is positioned proximate to the non-magnetic wire retainer such that a centerline of the permanent magnet is equidistant from the circumference of the circular groove to provide the substantially uniform magnetic field along the circumference of the circular groove;
- and
- a force sensor coupled to the permanent magnet that is configured to measure an attractive force between the permanent magnet and the ferromagnetic wire for determining the magnetic permeability of the ferromagnetic wire.
A method for measuring a magnetic permeability of a ferromagnetic wire, the method comprising:
- retaining the ferromagnetic wire within a circular groove of a non-magnetic wire retainer;
- applying a substantially uniform magnetic field along a circumference of the circular groove utilizing a permanent magnet by positioning the permanent magnet proximate to the non-magnetic wire retainer such that a centerline of the permanent magnet is equidistant from the circumference of the circular groove to provide the substantially uniform magnetic field along the circumference of the circular groove;
- and
- measuring an attractive force between the permanent magnet and the ferromagnetic wire for determining the magnetic permeability of the ferromagnetic wire.
Dependencies are inferred from the claim text.