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US 10,763,823 B2Granted
Elliptically-shaped resonator markers with enhanced frequency stability and gain
Assignee3M Innovative Properties Company
InventorsCurtis L. Shoemaker, Ding Wang, Ziyad H. Doany
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Abstract
A magnetoelastic resonator device comprises a housing, at least one elliptically-shaped or substantially elliptically-shaped magnetoelastic element disposed within the housing, and at least one bias magnet disposed in the housing, wherein the at least one elliptically-shaped or substantially elliptically-shaped magnetoelastic element is configured to couple to an external magnetic field at a particular frequency and convert the magnetic energy into mechanical energy, in the form of oscillations.
Claims15
A magnetoelastic resonator device, comprising:
- a housing;
- at least one elliptically-shaped or substantially elliptically-shaped magnetoelastic element disposed within the housing;
- at least one bias magnet disposed in the housing, wherein the at least one elliptically-shaped or substantially elliptically-shaped magnetoelastic element is configured to couple to an external magnetic field at a particular frequency and convert the magnetic energy into mechanical energy, in the form of oscillations, wherein the at least one elliptically-shaped or substantially elliptically-shaped magnetoelastic element comprises at least two elliptically-shaped or substantially elliptically-shaped magnetoelastic elements in a stacked arrangement;
- and
- a displacement restriction element disposed in a central lengthwise region of the stacked arrangement to restrict displacement of the at least two magnetoelastic elements with respect to each other at the central lengthwise region, wherein the first and second ends experience flaring movement.
2 more elements
A magnetoelastic resonator device, comprising:
- at least one elliptically-shaped or substantially elliptically-shaped magnetoelastic element having a first lengthwise end and a second lengthwise end;
- a first bias magnetic element disposed adjacent to the first lengthwise end of the at least one elliptically-shaped or substantially elliptically-shaped magnetoelastic element;
- a second bias magnetic element disposed adjacent to the second lengthwise end of the at least one elliptically-shaped or substantially elliptically-shaped magnetoelastic element;
- a substrate to support the at least one elliptically-shaped or substantially elliptically-shaped magnetoelastic element and first and second bias elements, wherein the at least one elliptically-shaped or substantially elliptically-shaped magnetoelastic element comprises at least two elliptically-shaped or substantially elliptically-shaped magnetoelastic elements in a stacked arrangement;
- and
- a displacement restriction element disposed in a central lengthwise region of the stacked arrangement to restrict displacement of the at least two magnetoelastic elements with respect to each other at the central lengthwise region, wherein the first and second ends experience flaring movement.
3 more elements
A linear array magnetoelastic resonator device, comprising:
- a first plurality of elliptically-shaped or substantially elliptically-shaped elements disposed in a first stacked arrangement, each element having a first lengthwise end and a second lengthwise end;
- a second plurality of elliptically-shaped or substantially elliptically-shaped elements disposed in a second stacked arrangement, each element having a first lengthwise end and a second lengthwise end;
- a first bias magnetic element disposed adjacent to the first lengthwise end of the first stacked arrangement;
- a second bias magnetic element disposed adjacent to the second lengthwise ends of the first stacked arrangement, wherein the second bias magnetic element is also disposed adjacent to the first end of the second stacked arrangement;
- a third bias magnetic element disposed adjacent to the second lengthwise end of the second stacked arrangement;
- a first displacement restriction element disposed in a central lengthwise region of the first stacked arrangement to restrict displacement of the plurality of magnetoelastic elements with respect to each other at the central lengthwise region, wherein the first and second lengthwise ends experience flaring movement;
- and
- a second displacement restriction element disposed in a central lengthwise region of the second stacked arrangement to restrict displacement of the plurality of magnetoelastic elements with respect to each other at the central lengthwise region, wherein the first and second lengthwise ends experience flaring movement.
5 more elements
Dependencies are inferred from the claim text.