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Measurement of Constitutive Properties of a Powder Subject to Compressive Axial and Radial Loading, Using Optical Sensing

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.

Patent Number: 
7,733,466
Date Of Issue: 
06/08/2010
Inventors: 

Alexander Beltran Bernardo; Gary Lane Burkhardt; Arthur Edwin Nicholls; Walter Mac Gray