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

Table 6

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	1.38410	0.57731	21.012	5.06%	23.531	17.65%
40	1.38407	0.57733	38.975	-2.56%	41.891	4.72%
60	1.38403	0.57741	61.211	2.02%	62.301	3.83%
80	1.38397	0.57742	82.007	2.50%	82.990	3.73%
100	1.38394	0.57744	101.250	1.25%	95.699	-4.30%
120	1.38388	0.57748	118.271	-1.43%	122.256	1.88%
140	1.38379	0.57751	142.571	0.11%	134.368	-3.88%
160	1.38372	0.57757	163.254	2.03%	163.021	1.88%
180	1.38363	0.57760	180.201	0.11%	181.336	0.74%
200	1.38357	0.57763	198.367	-0.82%	208.214	4.10%