Hier finden Sie wissenschaftliche Publikationen aus den Fraunhofer-Instituten.

EMUS-Gerätetechnik - Stand, Anwendungen, Entwicklungstendenzen


Deutsche Gesellschaft für Zerstörungsfreie Prüfung e.V. -DGZfP-, Berlin:
Innovative ZfP - eine Herausforderung für die gesamte Industrie. Teil 2
Berlin, 1992 (DGZfP-Berichtsbände 33)
Deutsche Gesellschaft für Zerstörungsfreie Prüfung (Jahrestagung) <1992, Fulda>
Fraunhofer IZFP ()
Eisenbahn; electromagnetic transduction; elektromagnetische Ultraschallwandlung; filling level; Füllstand; high-speed train; high-temperature probe; Hochgeschwindigkeitszug; Hochtemperaturprüfkopf; inservice inspection; inspection system; modular system; modulares System; monitoring; Oberflächenprüfung; Prüfsystem; railway wheel; railways; Rohr; surface inspection; tube; Überwachung; Ultraschall; Ultraschallgerät; Ultraschallprüfkopf; Ultraschallprüfung; ultrasonic equipment; ultrasonic materials testing

The state of the art of the EMUS (electromagnetic-ultrasonic) system technology is illustrated presenting as examples two typical systems, an 8-channel phase array system for ultrasonic inspections in the field especially of the primary circuit of nuclear power plants, and a 2-channel standard system. The phased array technique provides a significant enhacement of the signal-to-noise ratio and the bandwidth, suppression of the sensitivity in the backward direction of the ultrasonic probe, and allows electronic setting and changing of the angle of incidence at a fixed frequency. Production costs of EMUS systems will be reduced by modular design of all electronic components. Miniaturization using SMD and PAL technology will alow to build e.g. a 8-channel phased array system housing with a height of 150 mm. Miniaturized EMUS probes allow new applications of the EMUS technique utilizing Rayleigh waves, shear horizontal waves, and normally incident linearly polarized shear waves.