Measuring and testing – Specimen stress or strain – or testing by stress or strain... – By loading of specimen
Patent
1996-04-01
1997-08-26
Dombroske, George M.
Measuring and testing
Specimen stress or strain, or testing by stress or strain...
By loading of specimen
356 30, G01L 124
Patent
active
056612460
ABSTRACT:
An assembly which allows use of Fiber Optic Displacement Sensors in a high-temperature environment. The package described is protected against harsh environments. Provisions are taken to allow averaging strains over distances of at least 1/2 to 4 feet, and to allow installation in cramped spaces. A rod is attached to an underlying surface at one point and guided to move in a selected direction of measurement. The distance between a selected movable location on the rod and a point fixed on the surface, is measured using a bent optical fiber having light loss characteristics dependent on that distance. The fiber is gold coated and the holders, guides and other hardware are enclosed in heat shielding trays in which a plurality of sensors are positioned at selected locations along a steam pipe, boiler, vessel or other surface.
REFERENCES:
patent: 3075160 (1963-01-01), Starr
patent: 3729985 (1973-05-01), Sikorra
patent: 4279164 (1981-07-01), Hawke et al.
patent: 5079955 (1992-01-01), Eberhardt
patent: 5199305 (1993-04-01), Smith et al.
patent: 5381005 (1995-01-01), Chazelas et al.
Voss Karl Friedrich
Wanser Keith H.
Dombroske George M.
Noori Max H.
Tachner Leonard
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