Figure 11.
Barely visible impact damage (BVID) impact detection on the SHM layer CFRP plate at 50 kHz, baseline recorded at 25 °C: (a) 0 °C, five transducers; (b) 0 °C, four transducers; (c) 35 °C, five transducers; (d) 35 °C, four transducers.
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