Research on Pipeline Damage Imaging Technology Based on Ultrasonic Guided Waves

Figure 6

Time domain diagram of guided waves in single-defective sections at different excitation frequencies. (a) 30 kHz guided wave signal; (b) 40 kHz guided wave signal; (c) 50 kHz guided wave signal; (d) 60 kHz guided wave signal; (e) 70 kHz guided wave signal; (f) 80 kHz guided wave signal; (g) 90 kHz guided wave signal; (h) 100 kHz guided wave signal.

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