Regulatable creep strain gauges and process for obtaining such g

Details Regulatable creep strain gauges and process for obtaining such g Regulatable creep strain gauges and process for obtaining such g

1988-10-13

1990-07-03

Reynolds, Bruce A.

Electrical resistors

Strain gauge type

338 5, G01L 122

Patent

active

049394967

ABSTRACT:
A strain gauge for compensating the creep of a support and a process for obtaining a strain gauge. The gauge is bonded to a support and includes a piezoresistive pattern etched on one face of a flexible film. A layer of a material subject to relaxation is deposited on the other face of the film. The relaxation layer is bonded to a test piece of the same material as the support. A constant force is applied for producing a creep on the test piece and the resistance of gauge as a function of time is measured. The thickness of the relaxation layer is adjusted to cancel out the evolution of the resistance of the gauge.

REFERENCES:
patent: 3863192 (1975-01-01), Grey
patent: 3905005 (1975-09-01), Hutchins, IV.
patent: 4319397 (1982-03-01), Tanabe et al.
patent: 4545255 (1985-10-01), Pugnaire
patent: 4630491 (1986-11-01), Kitagawa
patent: 4633212 (1986-12-01), Johnson
patent: 4777826 (1988-10-01), Rud, Jr. et al.
Technisches Messen, vol. 50, No. 12, Dec., 1983, pp. 455-460, "Sensoren mit Folien-und Dunnfilm-Dehnungsmesstreifen".

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