Filtern
Erscheinungsjahr
Dokumenttyp
- Beitrag zu einem Tagungsband (21) (entfernen)
Schlagworte
- Luftultraschall (4)
- Air-coupled ultrasound (3)
- Akustische Impedanz (3)
- Ferroelectret (2)
- Polypropylen (2)
- Sensor (2)
- Transducer (2)
- Air coupled ultrasound (1)
- Air-coupled ultrasonic transducers (1)
- Cellular polypropylene (1)
Ferroelectrets are promising materials for air-coupled ultrasonic transducers. A transducer made of polarized cellular polypropylene, including its electronic interface, was developed and compared with conventional air-coupled probes. Test pieces of fiber-reinforced polymer containing impact flaws and flat-bottom holes were inspected in transmission. The ferroelectret transducers achieved a considerably higher signal-to-noise ratio. The impacts were clearly visible with all transducers, but less noisy with ferroelectret transducers. The flat-bottom holes were better detectable than with a conventional probe with about the same focus size.
Making Cure Visible
(2005)