Strain/deflection sensitive variable reluctance transducer assem

Details Strain/deflection sensitive variable reluctance transducer assem Strain/deflection sensitive variable reluctance transducer assem

1979-09-28

1981-05-26

Myracle, Jerry W.

Measuring and testing

Specimen stress or strain, or testing by stress or strain...

Specified electrical sensor or system

336130, G01B 716

Patent

active

042690706

ABSTRACT:
A variable reluctance transducer assembly for measuring the strain deflection in a structural member includes an elongate housing which is mounted to a first lug extending transversely outwardly from the structural member. The housing supports a pair of magnetic cores in spaced parallel relationship to each other. Each core in turn supports a wire coil. The coils are wired to each generate a magnetic field when energized by an electric current. The transducer assembly is also composed of an elongate target mounted on a second lug extending transversely from the structural member at a location longitudinally spaced from the other lug. The target includes a plate portion which extends longitudinally toward the housing to lie nominally between the two spaced apart cores and their corresponding coils to form a portion of the path along which the magnetic lines of flux eminating for each of the two coils travels. A flexible metal bellows interconnects the housing and target to enclose the cores and target plate while simultaneously permitting the target plate to move toward and away from the cores in response to the relative movement between the mounting lugs to thereby vary the reluctance between the target plate and each coil.

REFERENCES:
patent: 2839733 (1958-06-01), Bassett
patent: 3118121 (1964-01-01), Tavis
patent: 3390575 (1968-07-01), Hukle
patent: 3464259 (1969-09-01), Farr
patent: 3486371 (1969-12-01), Dybvad et al.
patent: 3521484 (1970-07-01), Dybvad et al.
patent: 3562687 (1971-02-01), Tavis
patent: 3739196 (1973-06-01), Tavis

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