Optics: measuring and testing – By polarized light examination – With light attenuation
Patent
1995-03-06
1997-11-04
Font, Frank G.
Optics: measuring and testing
By polarized light examination
With light attenuation
356373, 356228, G01B 1100
Patent
active
056845960
ABSTRACT:
An optical system for determining the axial load, the torsional load or both on a generally cylindrical member, such as a valve stem in a motor operated valve, includes a first system for producing a test light that is modified by a physical change in the valve stem caused by the load, a second system for receiving the test light and converting the same to a first signal indicative of the physical change, and a third system for converting the first signal to a second signal indicative of the load, preferably by utilizing one or more of the relations defined in Equations 1-3. The physical change in the cylindrical member can be, for example, a diametrical change or a longitudinal change, which can be measured by the first and second systems. The dimensional changes can be related to the axial load according to Hooke's Law or Poisson's relation by the third system when material properties and the geometry of the cylindrical member are known. Similarly, the torsional load applied to the cylindrical member can be obtained by measuring the twist angle between two longitudinally separated planes of the member, and applying a known relation between the twist angle and known geometric and material characteristics of the cylindrical member.
REFERENCES:
patent: 4962669 (1990-10-01), Gernhart et al.
patent: 5056046 (1991-10-01), Mutchler et al.
patent: 5123283 (1992-06-01), Duff et al.
patent: 5199304 (1993-04-01), Ferguson
patent: 5231469 (1993-07-01), Jeffers et al.
Anderson Klane B.
Eslinger Rodney M.
Morlan David E.
Smith Christopher P.
Font Frank G.
Isaf Louis T.
Ratliff Reginald A.
Westinghouse Electric Corporation
LandOfFree
Method and apparatus for measuring axial and torsional loads on does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for measuring axial and torsional loads on , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for measuring axial and torsional loads on will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1837152