Measurement of strain in an adhesively bonded joint including magnetostrictive material
AssigneeThe Boeing Company
InventorsRobert J. Miller, Gary E. Georgeson
Life of this patent
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Abstract
Sensing strain in an adhesively bonded joint includes inducing a strain wave in the joint, and sensing a change in local magnetic characteristics in the joint.
Claims24
A method of sensing strain in an adhesively bonded joint, the method comprising:
- inducing a strain wave in the joint;
- and
- sensing a change in local magnetic characteristics in the joint.
A system comprising:
- a structure having an adhesively bonded join including particles made of a magnetostrictive material;
- means for inducing a strain wave in a selected region of the joint to change magnetic anisotropy of the magnetostrictive material;
- and
- means for sensing a change in local magnetic characteristics in the selected region.
A method of sensing strain in an adhesively bonded joint, the method comprising inducing a strain wave in the joint with a vacuum;
- and sensing a change in local magnetic characteristics in the joint.
A method of sensing strain in an adhesively bonded joint, the method comprising using an array to induce a strain wave in the joint and also sense a change in local magnetic characteristics in the joint, the array including strips of acoustic material extending in one direction and strips of micromagnetic sensing material extending in another direction, wherein at least one of the strips of acoustic material is selected to induce the strain wave at a selected region, and wherein at least one of the strips of micromagnetic sensor material is selected to sense the change in local magnetic characteristics at the selected region.
Dependencies are inferred from the claim text.