Results 11 to 20 of about 121,008,133 (297)
A Novel Broadband Ultrasonic Location System [PDF]
, 2002 Indoor ultrasonic location systems provide ne-grained position data to ubiquitous computing applications. However, the ultrasonic location systems previously developed utilize narrowband transducers, and thus perform poorly in the presence of noise and ...
Ward, Andy, Hazas, Michael
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Novel hydrophilic polymer couplant for application in ultrasonic non destructive testing [PDF]
, 2001 Ultrasonic Non Destructive Testing (NDT) is used to inspect materials and structures for defects. Water is commonly used in NDT as a couplant to improve ultrasonic transfer between an interrogating probe and test piece.
Bourne, Simon James
core +3 more sources
Ultrasonic C-Scan Standardization for Polymer-Matrix Composites - Acoustic Considerations [PDF]
, 1998 Ultrasonic C-scan inspection techniques are widely used for the non-destructive evaluation of fiber-reinforced polymer composites. A C-scan is any two-dimensional scan of a specimen that produces a map of a parameter, such as reflected amplitude, as it ...
S. J. Willsher +17 more
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Accuracy Assessment of Ultrasonic C-scan and X-ray Radiography Methods for Impact Damage Detection in Glass Fiber Reinforced Polyester Composites [PDF]
Journal of Applied and Computational Mechanics, 2019 The present study introduces two quantitative parameters to compare the accuracy of ultrasonic C-scan testing and X-ray radiography methods in the damaged area detection under low-velocity impact in polymer-based composites.
Seyyed Abbas Arhamnamazi +3 more
doaj +1 more source
A Sparse Reconstruction Algorithm for Ultrasonic Images in Nondestructive Testing
Sensors, 2015 Ultrasound imaging systems (UIS) are essential tools in nondestructive testing (NDT). In general, the quality of images depends on two factors: system hardware features and image reconstruction algorithms.
Giovanni Alfredo Guarneri +4 more
doaj +1 more source
Ultrasonic Scans of the Tongue [PDF]
The Journal of the Acoustical Society of America, 1971 Ultrasonic scans taken along the longitudinal dimension of the tongue, depicting a saggital plane on the dorsal surface of the tongue, are compared with similar views obtained via conventional lateral head x ray. Also, transverse ultrasonic scans are presented which picture the dorsal surface of the tongue in coronal section, coronal oblique section ...
C. A. Kelsey, Fred D. Minifie
openaire +1 more source
Sensors, 2019 Laser-generated ultrasound is a modern non-destructive testing technique. It has been investigated over recent years as an alternative to classical ultrasonic methods, mainly in industrial maintenance and quality control procedures.
Hossam Selim +4 more
doaj +1 more source
2D size, position and shape definition of defects by B-scan image analysis [PDF]
Fracture and Structural Integrity, 2015 The non-destructive evaluation of defects by automatic procedures is of great importance for structural components. Thanks to the developments of the non-contact ultrasonic techniques, the automation of the inspections is gaining a progressively ...
Michele Scafidi +2 more
doaj +2 more sources
Image processing of ultrasonic a-scan data using synthetic aperture focusing technique
, 2001 This paper looks at image processing of ultrasonic a-scan data using synthetic aperture focusing ...
McNab, A., Potts, A.
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Ultrasonic C-Scan Inspection Of Composite Materials [PDF]
, 1992 Ultrasonic technique using an automated C-scan has been established as the primary inspection method for composite materials. In this paper, the principles of ultrasonic inspection, the type of defects that may be generated during fabrication and/or ...
Fahr, A.
core +1 more source