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Resonance ultrasonic thermography: Highly efficient contact and air-coupled remote modes
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10.1063/1.4792236
/content/aip/journal/apl/102/6/10.1063/1.4792236
http://aip.metastore.ingenta.com/content/aip/journal/apl/102/6/10.1063/1.4792236
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Frequency response (a) and vibration pattern at 11 kHz (b) for LDR in a circular FBH (10 mm radius and thickness 0.8 mm) in PMMA plate (200 × 40 × 4 mm3).

Image of FIG. 2.
FIG. 2.

ULT-LDR image of a circular FBH (radius 10 mm and thickness 0.8 mm) in PMMA plate at LDR frequency 11 kHz. Insonation time 15 s; input voltage of the transducer 80 V.

Image of FIG. 3.
FIG. 3.

Temperature variation of a FBH at LDR (11 kHz) as a function of input voltage of ultrasonic transducer. Insonation time 15 s.

Image of FIG. 4.
FIG. 4.

Comparison between FBH temperature frequency response and LDR acoustic frequency response (shown in Fig. 1 ) squared.

Image of FIG. 5.
FIG. 5.

LDR lock-in phase (modulation 0.02 Hz, (a)) and conventional temperature (60 s insonation, ∼3 mW input, (b)) images of a circular FBH in PMMA plate at LDR frequency 11 kHz.

Image of FIG. 6.
FIG. 6.

Temperature ACU ULT image of FBH (3 mm radius and 1 mm thickness) in PMMA plate (50 kHz LDR excitation and 54 mW ACU input power (a)); LDR induced temperature rise as a function of ACU power (b).

Image of FIG. 7.
FIG. 7.

Imaging of impact-induced damage in multi-ply CFRP plate (photo (a)); laser vibrometry image (b) and ACU-ULT lock-in phase image (modulation 0.03 Hz, (c)) at LDR frequency 69.6 kHz.

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/content/aip/journal/apl/102/6/10.1063/1.4792236
2013-02-12
2014-04-19
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Resonance ultrasonic thermography: Highly efficient contact and air-coupled remote modes
http://aip.metastore.ingenta.com/content/aip/journal/apl/102/6/10.1063/1.4792236
10.1063/1.4792236
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