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1992
Conference Paper
Title
EMUS-Gerätetechnik - Stand, Anwendungen, Entwicklungstendenzen
Abstract
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.
Language
German
Keyword(s)
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