454
W. Wu et al.
Fig. 40.6 Velocity
calculation- error bar and
regression line
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0
400
800
1200
1600
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2400
2800
y=4622x-28
Mean(Time Difference) vs Distance Difference
Linear Fit
Distance Difference (mm)
Time Difference (ms)
(a) Location analysis
Fig. 40.7 Location analysis in region of A2
(a) Location by AST at Vu=4500m/s
(b) Location by AST at Vu =4000m/s
Fig. 40.8 Location diagrams generated by automatic sensor test(AST) at different sound velocities