Degaussing a magnetized structure
AssigneeNorthrop Grumman Systems Corporation
InventorVictor M. Cubias
Life of this patent
Estimating the term…
Abstract
A system for degaussing a magnetized structure can include a given circuit that provides a differential alternating current (AC) signal that decays from an upper level to a lower level over a predetermined amount of time. The system also includes a given electrical coil coupled to the given circuit. The electrical coil circumscribes the magnetized structure. The electrical coil induces a decaying magnetic field on the magnetized structure in response to the differential AC signal to convert the magnetized structure into a degaussed structure.
Claims20
A system for degaussing a magnetized structure, the system comprising:
- a first circuit that provides an alternating current (AC) signal that decays from an upper level to a lower level over a predetermined amount of time;
- a first electrical coil coupled to the first circuit, wherein the first electrical coil circumscribes the magnetized structure, wherein the first electrical coil induces a decaying magnetic field on the magnetized structure in response to the AC signal to convert the magnetized structure into a degaussed structure;
- and
- a second electrical coil that is positioned in an interior portion of the magnetized structure, wherein a direct current (DC) signal is provided to the second electrical coil to induce an offset magnetic field on the degaussed structure.
A system for degaussing a magnetized structure, the system comprising:
- an alternating current (AC) waveform generator that provides an AC waveform that decays from an upper level to a lower level over a predetermined amount of time;
- an amplifier that converts the AC waveform into a AC signal and amplifies the AC signal;
- a first electrical coil coupled to a first circuit, wherein the first electrical coil circumscribes the magnetized structure;
- a direct current (DC) waveform generator that provides a DC signal that remains nearly constant over the predetermined amount of time;
- a second electrical coil positioned in a chamber of the magnetized structure, wherein the second electrical coil receives the DC signal provided by the DC waveform generator;
- and
- a shielded gauss chamber that encapsulates the first electrical coil, the second electrical coil and the magnetized structure, wherein the shielded gauss chamber prevents magnetic fields from penetrating the magnetized structure;
- wherein the first electrical coil induces a decaying magnetic field on the magnetized structure in response to the amplified AC signal and the second electrical coil induces a nearly constant magnetic field on the magnetized structure to convert the magnetized structure into a degaussed structure with an offset magnetic field.
A method for degaussing a magnetized structure, the method comprising:
- generating, at a first circuit, a alternating current (AC) signal that decays from an upper level to a lower level over a predetermined amount of time;
- inducing, by a first electrical coil that is coupled to the first circuit and that circumscribes a magnetized structure, a decaying magnetic field on the magnetized structure in response to the AC signal to convert the magnetized structure into a degaussed structure;
- and
- inducing, by a second electrical coil that is positioned in an interior portion of the magnetized structure, an offset magnetic field on the degaussed structure in response to the second electrical coil receiving a direct current (DC).
Dependencies are inferred from the claim text.