STEPPED FREQUENCY ULTRASONIC HOLOGRAPHY FOR FLAW CHARACT.

Award Information
Agency: Department of Energy
Branch: N/A
Contract: N/A
Agency Tracking Number: 401
Amount: $455,638.00
Phase: Phase II
Program: SBIR
Awards Year: 1984
Solicitation Year: N/A
Solicitation Topic Code: N/A
Solicitation Number: N/A
Small Business Information
565 Industry Drive, Seattle, WA, 98188
DUNS: N/A
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 B.p. Hidelbrand
 () -
Business Contact
Phone: () -
Research Institution
N/A
Abstract
ULTRASONIC IMAGING SYSTEMS OF VARIOUS TYPES ARE PRESENTLY UNDER DEVELOPMENT FOR NONDESTRUCTIVE TESTING. ALL OF THEM REQUIRE A TWO-DIMENSIONAL APERTURE TO BE SCANNED BY A TRANSDUCER, OR FILLED WITH MULTIPLE TRANSDUCERS. A PARTICULARLY INTERESTING SYSTEM IS ONE BASED ON HOLOGRAPHIC PRINCIPLES. IN MANY REACTOR LOCATIONS IT IS VERY DIFFICULT TO IMPLEMENT EITHER A SCANNER OR A LARGE ARRAY OF TRANSDUCERS. RECENT WORK HAS SHOWN THAT UNDER SOME CIRCUMSTANCES IT IS POSSIBLE TO USE FREQUENCY SWEEPING TO GENERATE A SYNTHETIC APERTURE IN ONE DIMENSION. THIS ALLOWSA SINGLE DIMENSIONAL CROSS-SECTIONAL IMAGE TO BE MADE FROM ONE FIXED TRANSDUCER, OR A TWO-DIMENSIONAL IMAGE FROM A LINE ARRAY OF TRANSDUCERS. IN THIS RESEARCH, WE WILL ADAPT THE SWEPT FREQUENCY METHOD TO OUR STANDARD HOLOGRAPHIC SYSTEM TO ACHIEVE THIS TYPE OF IMAGING.

* Information listed above is at the time of submission. *

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