Measuring and testing – Specimen stress or strain – or testing by stress or strain... – By loading of specimen
Patent
1987-09-09
1991-06-04
Raevis, Robert
Measuring and testing
Specimen stress or strain, or testing by stress or strain...
By loading of specimen
G01L 124
Patent
active
050203797
ABSTRACT:
A microbend strain gauge comprises a pair of plates having facing offset corrugations which clamp a signal optical fiber therebetween. The optical fiber is coated and a light signal is supplied to one end of the fiber which is read at an opposite end of the fiber by an optical sensor. Modulations in the light are primarily due to a difference in pressure being applied to the fiber by the plates. A second optical fiber, is subjected to the same thermal condition and its light signal compared to the light signal through the signal optical fiber to offset any temperature error introduced into the signal by changes in temperature. Aluminum, polyimide or gold coating increases temperature resistance for the fibers.
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Berthold John W.
Reed Stuart E.
Edwards Robert J.
Kalka Daniel S.
Matas Vytas R.
Raevis Robert
The Babcock & Wilcox Company
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