FEATURE ENHANCED ULTRASONIC FLAW DETECTION AND MICROSTRUCTURE CHARACTERIZATION ALGORITHMS FOR NDE SYSTEMS

Award Information
Agency: National Aeronautics and Space Administration
Branch: N/A
Contract: N/A
Agency Tracking Number: 16916
Amount: $489,130.00
Phase: Phase II
Program: SBIR
Awards Year: 1992
Solicitation Year: N/A
Solicitation Topic Code: N/A
Solicitation Number: N/A
Small Business Information
Information Systems Tech Inc.
413 E 61st St, Clarendon Hills, IL, 60514
DUNS: N/A
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 () -
Business Contact
Phone: () -
Research Institution
N/A
Abstract
IN THIS PROJECT, SOME NOVEL SIGNAL-PROCESSING TECHNIQUES FOR FEATURE-ENHANCED, ULTRASONIC NDE SYSTEMS WILL BE EXAMINED AND IMPLEMENTED. THE PROCESSING TECHNIQUES HAVE TWO OBJECTIVES: TO REDUCE THE BACKGROUND NOISE IN ORDER TO IMPROVE FLAW VISIBILITY AND SIZING, AND TO OBTAIN SIGNAL PARAMETERS THAT CAN BE CORRELATED TO THE MICROSTRUCTURE FOR CHARACTERIZATION. AN INTERACTIVE SOFTWARE PACKAGE FOR AN APPLE MAC II PLATFORM, ADAPTABLE TO THE NDE ULTRASONIC SYSTEM AT NASA, WILL BE DEVELOPED AND IMPLEMENTED. FOR ENHANCED ULTRASONIC FLAW DETECTION, A SPLIT-SPECTRUM PROCESSING FOLLOWED BY AVERAGING, MEDIAN FILTERING, MINIMUM DETECTION, QUADRATIC OPTIMAL DETECTION, AND GENERALIZED-ORDER STATISTIC FILTERING WILL BE DEVELOPED. NOVEL ALGORITHMS FOR MICROSTRUCTURE IMAGING AND CHARACTERIZATION SUCH AS TEMPORAL SMOOTHING, DISPERSIVE VELOCITY ESTIMATION, CORRELATION PROCESSING, HOMOMORPHIC PROCESSING, POWER SPECTRUM AND MOMENT ESTIMATION, AND LINEARPREDICTIVE CODING WILL BE DEVELOPED AND IMPLEMENTED. IN THIS PROJECT, SOME NOVEL SIGNAL-PROCESSING TECHNIQUES FOR FEATURE-ENHANCED, ULTRASONIC NDE SYSTEMS WILL BE EXAMINED AND IMPLEMENTED. THE PROCESSING TECHNIQUES HAVE TWO OBJECTIVES: TO REDUCE THE BACKGROUND NOISE IN ORDER TO IMPROVE FLAW VISIBILITY AND SIZING, AND TO OBTAIN SIGNAL PARAMETERS THAT CAN BE CORRELATED TO THE MICROSTRUCTURE FOR CHARACTERIZATION. AN INTERACTIVE SOFTWARE PACKAGE FOR AN APPLE MAC II PLATFORM, ADAPTABLE TO THE NDE ULTRASONIC SYSTEM AT NASA, WILL BE DEVELOPED AND IMPLEMENTED. FOR ENHANCED ULTRASONIC FLAW DETECTION, A SPLIT-SPECTRUM PROCESSING FOLLOWED BY AVERAGING, MEDIAN FILTERING, MINIMUM DETECTION, QUADRATIC OPTIMAL DETECTION, AND GENERALIZED-ORDER STATISTIC FILTERING WILL BE DEVELOPED. NOVEL ALGORITHMS FOR MICROSTRUCTURE IMAGING AND CHARACTERIZATION SUCH AS TEMPORAL SMOOTHING, DISPERSIVE VELOCITY ESTIMATION, CORRELATION PROCESSING, HOMOMORPHIC PROCESSING, POWER SPECTRUM AND MOMENT ESTIMATION, AND LINEARPREDICTIVE CODING WILL BE DEVELOPED AND IMPLEMENTED.

* information listed above is at the time of submission.

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