DEVELOPMENT OF AN EDDY-CURRENT SENSOR AND ALGORITHM FOR THREE-DIMENSIONAL QUANTITATIVE NONDESTRUCTIVE EVALUATION

Award Information
Agency: Department of Energy
Branch: N/A
Contract: N/A
Agency Tracking Number: 392
Amount: $498,917.00
Phase: Phase II
Program: SBIR
Awards Year: 1984
Solicitation Year: N/A
Solicitation Topic Code: N/A
Solicitation Number: N/A
Small Business Information
2634 Round Hill Lane, Bloomington, IN, 47401
DUNS: N/A
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Harold A Sabbagh
 () -
Business Contact
Phone: () -
Research Institution
N/A
Abstract
THE PROPOSED RESEARCH PROBLEM IS TO DEVELOP A SENSOR, TOGETHER WITH A MATHEMATICAL ALGORITHM, THAT WILL ALLOW THE THREE-DIMENSIONAL QUANTITATIVE EDDY-CURRENT NONDESTRUCTIVE EVALUATION OF MATERIALS AND STRUCTURES. THE APPROACH THAT WE PROPOSE IS BASED ON, AND EXTENDS, WORK ON TWO-DIMENSIONAL EDDY-CURRENT NDE THAT HAS ALREADY BEEN PERFORMED BY ANALYTICS, INC. THAT WORK IS BRIEFLY REVIEWED.THE TECHNICAL OBJECTIVES OF THE PROPOSED RESEARCH ARE: (1) DETERMINE SUITABILITY OF HALL-EFFECT PROBES FOR SENSING EDDY-CURRENTS, (2) DETEMINE OPTIMUM ARRAY OF HALL-EFFECT PROBES FOR THE SENSOR, (3) DETERMINE SUITABILITY OF DISTRIBUTED WINDINGS AND/OR "PHASED-ARRAYS" FOR SENSING, OR INDUCING, EDDY-CURRENTS, AND (4) EXTEND THE ALGORITHM FOR RECONSTRUCTING FLAWS IN TWO-DIMENSIONS TO THREE DIMENSIONS. THESE OBJECTIVES ARE MET BY ANALYZING A MODEL SENSOR, WHICH IS DESCRIBED. THE ANALYSIS IS BASED ON CERTAIN INTEGRAL RELATIONS FOR EDDY-CURRENTS. THESE INTEGRALS ARE DERIVED FROM FUNDAMENTAL ELECTROMAGNETIC THEORY, AND ARE THE FOUNDATION FOR OUR INVERSION TECHNIQUE.

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

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