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US 12,540,810 B2Granted
Systems and methods for sensing deformation of a magnetic material and fabrication methods thereof
AssigneeCarnegie Mellon University
InventorsTess Hellebrekers, Carmel Majidi
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Abstract
A soft magnetic sensor comprising a soft material containing randomly distributed magnetic microparticles and a magnetometer that can estimate force and localize contact over a continuous area. A reference magnetometer can be used to filter motion and ambient noise. Methods for locating contact and determining force comprise data analysis of the magnetometer output. In some embodiments, the sensor can localize an object prior to contact.
Claims16
A sensor comprising:
- a magnetometer disposed on a substrate;
- a stretchable magnetometer circuit connected to the magnetometer;
- a composite magnetic material having a magnetic field, comprising:
- a deformable material;
- and
- a plurality of magnetic particles dispersed within the deformable material,
- wherein the composite magnetic material has a base affixed to the substrate,
- wherein the magnetometer is positioned adjacent to the base of the composite magnetic material on an area of the substrate covered by the base;
- and
- a reference magnetometer positioned at a distance from the composite magnetic material and is configured to measure magnetic signals distinct from the magnetic field of the composite magnetic material,
- wherein the magnetometer is configured to sense the magnetic field of the composite magnetic material,
- wherein the magnetometer is configured to remain in a substantially fixed position relative to the base of the composite magnetic material in response to a deformation of the composite magnetic material, wherein a portion of the magnetic particles move relative to each other in response to the deformation.
9 more elements
Dependencies are inferred from the claim text.