Recent trends and developments in quality control and health monitoring of structures has been toward non-contact evaluation. The use of non-contact ultrasound has been especially interesting because it is a non-invasive technique, which is sensitive to a variety of material defects and conditions while providing good resolution. In this paper we present examples of non-contact ultrasonic solutions to current health monitoring problems. In the first example, we present the use electromagnetic acoustic transducers (EMAT) to the rapid detection of cracks in railroad wheels. In the second example we investigate the possible inspection of automobile and aircraft tires with air-coupled ultrasound. In the third example we demonstrate the use of laser-based Electronic Speckle Pattern Interferometry (ESPI) to provide in-situ full view images of out-of-plane contours resulting from laser drilling and cutting. In the fourth example, we use scanning acoustic microscopy (SAM) to image in-vivo human skin cells subjected to thermal or mechanical stress. While these examples are still laboratory projects, some of them are finding their way into industrial applications.
Quality control with ultrasound. Recent trends and developments
Qualitätskontrolle mit Ultraschall. Neuere Trends und Entwicklungen
2002
8 Seiten, 6 Bilder, 5 Quellen
(Nicht paginiert).
Aufsatz (Konferenz)
Datenträger
Englisch
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