Research on Pipeline Damage Imaging Technology Based on Ultrasonic Guided Waves

Table 6

Experimental data of the guided wave signals in single damage section.

Number	First signal time ()	End echo signal time ()	Damage signal time ()	Calculated distance (mm)
S1	109.10	1125.70	370.65	1389.308
S2	109.80	1125.80	371.50	1390.104
S3	109.20	1125.65	372.90	1400.728
S4	109.00	1125.65	377.45	1425.959
S5	109.25	1127.40	384.85	1463.939
S6	109.10	1125.70	377.70	1426.756
S7	109.20	1125.60	373.10	1401.790
S8	109.25	1125.80	371.05	1390.636