Nonlinear ultrasonic scanning to detect material defects
نویسندگان
چکیده
منابع مشابه
Classifying Defects in Pallet Stringers by Ultrasonic Scanning
Detecting and classifying defects are required to grade and sort pallet parts. Use of quality parts can extend the life cycle of pallets and can reduce long-term cost. An investigation has been carried out to detect and classify defects in yellow-poplar (Liriodendron tulipifera, L.) and red oak (Quercus rubra, L.) stringers using ultrasonic scanning. Data were collected for sound and unsound kn...
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Although problems relating to specific image correction have been explored intensively, the problem of simultaneous diagnosis for multiple photographic defects remains relatively untouched. Solutions to this problem attempt to predict the existence, severity, and locations of common defects. This paper proposes a first attempt at a solution to the general defect diagnosis problem based on our n...
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We have analysed retrospectively the pancreatic ultrasound scans (using a bistable machine) in 138 consecutive patients, and have related the results to the clinical status and the final diagnosis in each case. The scans were read without knowledge of the patient's clinical state. When technically unsatisfactory scans were excluded from consideration, the overall diagnostic accuracy of ultrason...
متن کاملNondestructive Evaluation of Defects in Wood Pallet Parts by Ultrasonic Scanning
Ultrasonic scanning experiments were conducted for detecting defects in wood pallet parts using rolling transducers. The characterization of defects is important for sorting and grading pallet parts, as well as for manufacturing quality and durable pallets. This paper reports the scanning results for stringers and deckboards – the two main components of pallet for red oak and yellow-poplar spec...
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2014 An overview is given describing the physical basis of ultrasonic reflectivity as it relates to solid material characterization. The examples given illustrate critical angle reflection, Rayleigh and Lamb waves, and crystal orientation via reflection measurements. Revue Phys. Appl. 20 (1985) 377-381 JUIN 1985, PAGE Classification Physics Abstracts 43.20
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ژورنال
عنوان ژورنال: The Journal of the Acoustical Society of America
سال: 1998
ISSN: 0001-4966
DOI: 10.1121/1.423839