Measuring and testing – Volume or rate of flow – Expansible chamber
Reexamination Certificate
2005-02-15
2005-02-15
Lefkowitz, Edward (Department: 2855)
Measuring and testing
Volume or rate of flow
Expansible chamber
C324S096000
Reexamination Certificate
active
06854327
ABSTRACT:
An apparatus and method for continuous, passive detection and measurement of tensile and compressional strain in a structure utilizing a shielded optic fiber, the optic fiber having one or more Bragg gratings thereon, the gratings and shield being disposed in a curved path on the structure and a baseline response for the grating is made using an optical source and detector. Changes in tensile or compressional forces on the structure will result in changes in the curve of the grating, resulting in a frequency shift for the returned light.
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Dria Dennis Edward
Rambow Frederick Henry Kreisler
Stewart David Ralph
Ellington Alandra
Lefkowitz Edward
Shell Oil Company
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