Matches in SemOpenAlex for { <https://semopenalex.org/work/W1617707598> ?p ?o ?g. }
Showing items 1 to 59 of
59
with 100 items per page.
- W1617707598 abstract "Synthetic-aperture image-enhancement techniques have been used to improve the resolution in ultrasonic images. In general it is believed that global surface variations will not degrade the resolution of the image but only produce errors in the location of the image relative to the actual location of the flaw. A sample which has a surface variation which is not untypical of the shrinkage around a weld is imaged in ultrasound. The image produced with standard synthetic-aperture enhancement which does not include corrections for the surface variations is of no better quality than the unenhanced image. The image produced accounting for the surface variations by using the front surface echo to map the surface does resolve the flaws. However, due to transducer side-lobe interference, the front-surface echo does not map the surface accurately enough for the enhancement algorithm to produce precise locations for the images of the flaws. Enhanced images of targets viewed with ultrasonic shear waves also show improved resolution. However, the problems with transducer side-lobes interfering with the front surface echo are worse with shear waves. Also the reconstruction process is more complex. Both these lead to inaccuracies in the locations of the flaws. Phase and amplitude measurements of wavesmore » reflected from a crack as a function of frequency and aperture position show promise of discriminating crack size. Measurements made on stainless-steel bars with fatigue cracks are discussed.« less" @default.
- W1617707598 created "2016-06-24" @default.
- W1617707598 creator A5021245991 @default.
- W1617707598 creator A5059425180 @default.
- W1617707598 date "1982-09-01" @default.
- W1617707598 modified "2023-09-27" @default.
- W1617707598 title "Ultrasonic-image reconstruction with surface mapping and synthetic-aperture techniques" @default.
- W1617707598 hasPublicationYear "1982" @default.
- W1617707598 type Work @default.
- W1617707598 sameAs 1617707598 @default.
- W1617707598 citedByCount "0" @default.
- W1617707598 crossrefType "journal-article" @default.
- W1617707598 hasAuthorship W1617707598A5021245991 @default.
- W1617707598 hasAuthorship W1617707598A5059425180 @default.
- W1617707598 hasConcept C120665830 @default.
- W1617707598 hasConcept C121332964 @default.
- W1617707598 hasConcept C127313418 @default.
- W1617707598 hasConcept C180205008 @default.
- W1617707598 hasConcept C192562407 @default.
- W1617707598 hasConcept C24890656 @default.
- W1617707598 hasConcept C56318395 @default.
- W1617707598 hasConcept C78336883 @default.
- W1617707598 hasConcept C81288441 @default.
- W1617707598 hasConceptScore W1617707598C120665830 @default.
- W1617707598 hasConceptScore W1617707598C121332964 @default.
- W1617707598 hasConceptScore W1617707598C127313418 @default.
- W1617707598 hasConceptScore W1617707598C180205008 @default.
- W1617707598 hasConceptScore W1617707598C192562407 @default.
- W1617707598 hasConceptScore W1617707598C24890656 @default.
- W1617707598 hasConceptScore W1617707598C56318395 @default.
- W1617707598 hasConceptScore W1617707598C78336883 @default.
- W1617707598 hasConceptScore W1617707598C81288441 @default.
- W1617707598 hasLocation W16177075981 @default.
- W1617707598 hasOpenAccess W1617707598 @default.
- W1617707598 hasPrimaryLocation W16177075981 @default.
- W1617707598 hasRelatedWork W142961715 @default.
- W1617707598 hasRelatedWork W1526362385 @default.
- W1617707598 hasRelatedWork W1881942125 @default.
- W1617707598 hasRelatedWork W1985995216 @default.
- W1617707598 hasRelatedWork W1998396916 @default.
- W1617707598 hasRelatedWork W2015778020 @default.
- W1617707598 hasRelatedWork W2057593929 @default.
- W1617707598 hasRelatedWork W2075016712 @default.
- W1617707598 hasRelatedWork W2076243283 @default.
- W1617707598 hasRelatedWork W2080774384 @default.
- W1617707598 hasRelatedWork W2088208551 @default.
- W1617707598 hasRelatedWork W2097242020 @default.
- W1617707598 hasRelatedWork W2136195169 @default.
- W1617707598 hasRelatedWork W2158766439 @default.
- W1617707598 hasRelatedWork W2539578620 @default.
- W1617707598 hasRelatedWork W2800983978 @default.
- W1617707598 hasRelatedWork W2897375287 @default.
- W1617707598 hasRelatedWork W3183586231 @default.
- W1617707598 hasRelatedWork W9031238 @default.
- W1617707598 hasRelatedWork W2461258458 @default.
- W1617707598 isParatext "false" @default.
- W1617707598 isRetracted "false" @default.
- W1617707598 magId "1617707598" @default.
- W1617707598 workType "article" @default.