Parameter Recognition of Mode-Converted Wave in Single-Source Ultrasound Using Gabor Transform for Bolt Axial Stress Evaluation

Table 7

Measurement result of sample .

Preset stress (MPa)			Result of LC-L (MPa)	Error of LC-L	Result of L-S (MPa)	Error of L-S
20	1.38022	0.57145	22.103	10.51%	17.655	-11.72%
40	1.38017	0.57147	38.127	-4.68%	40.239	0.59%
60	1.38013	0.57148	58.699	-2.16%	55.627	-7.28%
80	1.38004	0.57154	81.475	1.84%	88.044	10.05%
100	1.38001	0.57157	96.583	-3.42%	105.215	5.21%
120	1.37992	0.57159	119.338	-0.55%	123.144	2.62%
140	1.37985	0.57161	140.152	-0.10%	144.878	3.48%
160	1.37979	0.57162	163.254	2.03%	157.716	-1.42%
180	1.37974	0.57165	179.563	-0.24%	182.771	1.53%
200	1.37969	0.57164	199.361	-0.32%	204.885	2.44%