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Holographic imaging of natural-fiber-containing materials

United States Patent

7,855,673
December 21, 2010
View the Complete Patent at the US Patent & Trademark Office
Pacific Northwest National Laboratory - Visit the Technology Commercialization Program Website
The present invention includes methods and apparatuses for imaging material properties in natural-fiber-containing materials. In particular, the images can provide quantified measures of localized moisture content. Embodiments of the invention utilize an array of antennas and at least one transceiver to collect amplitude and phase data from radiation interacting with the natural-fiber-containing materials. The antennas and the transceivers are configured to transmit and receive electromagnetic radiation at one or more frequencies, which are between 50 MHz and 1 THz. A conveyance system passes the natural-fiber-containing materials through a field of view of the array of antennas. A computing device is configured to apply a synthetic imaging algorithm to construct a three-dimensional image of the natural-fiber-containing materials that provides a quantified measure of localized moisture content. The image and the quantified measure are both based on the amplitude data, the phase data, or both.
Bunch; Kyle J. (Richland, WA), Tucker; Brian J. (Pasco, WA), Severtsen; Ronald H. (Richland, WA), Hall; Thomas E. (Kennewick, WA), McMakin; Douglas L. (Richland, WA), Lechelt; Wayne M. (West Richland, WA), Griffin; Jeffrey W. (Kennewick, WA), Sheen; David M. (Richland, WA)
Battelle Memorial Institute (Richland, WA)
12/ 170,944
20080272954
July 10, 2008
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT This invention was made with Government support under Contract DE-AC0576RLO1830 awarded by the U.S. Department of Energy. The Government has certain rights in the invention.