Research Article
Research on Pipeline Damage Imaging Technology Based on Ultrasonic Guided Waves
Table 3
Guide wave propagation distances between the signal receiving points and defect reflection point.
| Number | First signal time () | End echo signal time () | Transmission speed () | Damage signal time () | Time delay () | Propagation distance () |
| S1 | 95.30 | 1127.85 | 5229.77 | 362.35 | 267.05 | 698.30 | S2 | 95.35 | 1127.80 | 5230.28 | 363.00 | 267.65 | 701.57 | S3 | 95.45 | 1127.85 | 5230.53 | 365.80 | 270.35 | 715.76 | S4 | 95.40 | 1127.70 | 5231.04 | 370.30 | 274.90 | 739.70 | S5 | 95.35 | 1127.86 | 5229.98 | 376.45 | 281.10 | 771.84 | S6 | 95.30 | 1127.70 | 5230.53 | 370.25 | 274.95 | 739.82 | S7 | 95.45 | 1127.85 | 5230.53 | 365.75 | 270.30 | 715.50 | S8 | 95.50 | 1127.80 | 5231.04 | 363.10 | 267.60 | 701.52 |
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