Optics: measuring and testing – Material strain analysis
Reexamination Certificate
2007-10-15
2010-06-08
Nguyen, Sang (Department: 2886)
Optics: measuring and testing
Material strain analysis
C073S760000, C073S818000
Reexamination Certificate
active
07733466
ABSTRACT:
A method and system for measuring radial strain on powder or other granular material while the powder is subject to compressive axial and radial loading. The powder is contained within a pliable sleeve. As pressure is applied to the powder, the sleeve changes diameter. An optical emitter emits a beam of light, which is intersected by the entire diameter of the sleeve. An optical sensor receives the intersected beam, and generates a response signal that indicates the diameter of the sleeve. This change in diameter can be related to a constitutive property such as strain.
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Bernardo Alexander Beltran
Burkhardt Gary Lane
Gray Walter Mac
Nicholls Arthur Edwin
Baker & Botts LLP
Nguyen Sang
Southwest Research Institute
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