Surface reconstruction of a three-dimensional ultrasonic flaw
In three-dimensional inverse scattering problems, the reconstruction of a solid scatterter is often difficult, if not impossible, and computationally expensive due to the dimensionality. To obtain only the geometrical information, a surface reconstruction algorithm is naturally more desirable since no additional knowledge can be gained from doing the solid reconstruction and the computation is reduced to two dimensions. With the application of the first Born approximation, this paper proposes a simple surfaces reconstruction technique for a three-dimensional target. In general, this method is ill-posed. However, the numerical instability part of the ill-posedness is removable when the surface has a two-fold symmetry with respect to a plane. To demonstrate this approach, three analytical examples are shown. 10 refs.
- Research Organization:
- EG and G Idaho, Inc., Idaho Falls, ID (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC07-76ID01570; W-7405-ENG-82
- OSTI ID:
- 10165128
- Report Number(s):
- EGG-M-91631; CONF-920550-1; ON: DE92018029
- Resource Relation:
- Conference: International Union of Theoretical and Applied Mechanics symposium on inverse problems in engineering mechanics,Tokyo (Japan),11-15 May 1992; Other Information: PBD: [1992]
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE
ULTRASONIC TESTING
IMAGE PROCESSING
TARGETS
IMAGES
TOMOGRAPHY
BORN APPROXIMATION
THREE-DIMENSIONAL CALCULATIONS
NONDESTRUCTIVE ANALYSIS
SURFACES
DEFECTS
SCATTERING
420200
990200
FACILITIES, EQUIPMENT, AND TECHNIQUES
MATHEMATICS AND COMPUTERS