Response of surface acoustic wave imaging systems to cylindrical inhomogeneities
Author
Gunalp, N.
Baygun, B.
Surucu, F.
Atalar, Abdullah
Date
1988-10Source Title
IEEE 1988 Ultrasonics Symposium Proceedings
Publisher
IEEE
Pages
591 - 594
Language
English
Type
Conference PaperItem Usage Stats
204
views
views
92
downloads
downloads
Abstract
The authors present a theory to predict the response of a SAW (surface acoustic wave) imaging system. In particular, they calculate the response to cylindrical cavities as a function of cavity position with respect to the focus point. The calculations indicated a high leak rate material will result in a better resolution in the y-direction. The theory also predicts an enhancement in the received signal level when the cylinder circumference equals the SAW wavelength. The images of cylinders obtained with such systems will indicate the size of the cylinders correctly at 20 dB below peak value as long as the cylinder diameter is larger than about a Rayleigh wavelength. For small cylinders the received peak amplitude can be used to determine the size of the cylinder.
Keywords
Surface acoustic wavesResponse surface methodology
Acoustic waves
Acoustic imaging
Surface cracks
Focusing
Scattering
Voltage
Surface waves
Acoustic materials
Permalink
http://hdl.handle.net/11693/50808Published Version (Please cite this version)
https://doi.org/10.1109/ULTSYM.1988.49445Collections
Related items
Showing items related by title, author, creator and subject.
-
Use of a conical axicon as a surface acoustic wave focusing device
Atalar, Abdullah; Köymen, Hayrettin (IEEE, 1987-01)Ultrasonic axicons generate waves which focus on a line. They are used in various imaging applications as hulk wave focusing devices with a very long depth of focus. A new type of conical axicon is introduced. It consists ... -
Anisotropy sensitivity of an acoustic lens with slit aperture
Atalar, Abdullah; Ishikawa, I.; Ogura, Y.; Tomita, K. (IEEE, 1993)A conventional spherical acoustic lens is modified by restricting its aperture in the form of a slit to provide directional sensitivity. The spacing between the two parallel absorbing sheets forming the slit is adjustable ... -
Response of acoustic imaging systems using convergent leaky waves to cylindrical flaws
Gonalp, N.; Atalar, Abdullah (IEEE, 1989)Characterization of near-surface properties of materials by acoustic means is most convenienth done by surface-acoustic-waves (SAW) that are spatially confined to the surface. There are several techniques available to ...