Radio-frequency tuned-circuit microdisplacement transducer

Details Radio-frequency tuned-circuit microdisplacement transducer Radio-frequency tuned-circuit microdisplacement transducer

1978-10-16

1980-01-08

Myracle, Jerry W.

Measuring and testing

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

Threaded fastener stress

331 65, 336200, G01L 500

Patent

active

RE0301833

ABSTRACT:
An inductance-capacitance loop defines a resonant circuit and is arranged in a member subject to stress. Strains resulting from the stress vary the inductance or capacitance of the circuit, and its resonant frequency. A dip meter is used to detect the resonant frequency and thus provides a reading indicative of the stress in the member.

REFERENCES:
patent: 1647474 (1927-11-01), Seymour
patent: 1837678 (1931-12-01), Ryder
patent: 2911605 (1959-11-01), Wales, Jr.
patent: 3886473 (1975-05-01), Heyck
patent: 3906340 (1975-09-01), Wingfield et al.
patent: 3943915 (1976-03-01), Severson
patent: 4016764 (1977-04-01), Rice
patent: 4026276 (1977-05-01), Chubbuck

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