Measuring and testing – Specimen stress or strain – or testing by stress or strain... – Specified electrical sensor or system
Patent
1989-10-20
1991-02-26
Myracle, Jerry W.
Measuring and testing
Specimen stress or strain, or testing by stress or strain...
Specified electrical sensor or system
73777, 357 25, G01B 716
Patent
active
049952617
ABSTRACT:
A transducer for measuring strain in an object on which the transducer is placed includes a flexible, generally planar frame member for placement on the object. The frame member, in turn, includes a pair of generally parallel beams, one of which is moveable with respect to the other when the object is subjected to strain, and a plurality of spaced-apart laterally flexible connecting beams extending between the pair of beams. The transducer also includes a force field emitter disposed on the one moveable beam for producing a force field which diminishes in strength with distance from the force field emitter. A spacer plate is disposed on the other of said parallel beams and a substrate is disposed on the spacer plate so as to be be positioned above, but spaced from the frame member. A detection element is disposed on the underside of the substrate generally above the force field emitter for detecting the presence of the force field and for producing signals representing force field strength and thus the distance of the detecting element from the force field emitter.
REFERENCES:
patent: 4772928 (1988-09-01), Dietrich et al.
patent: 4873871 (1989-10-01), Bai et al.
Jacobsen Stephen C.
Wood John E.
Myracle Jerry W.
Sarcos Group
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