Page 142 - 《应用声学》2022年第1期

138 2022 年 1 月

12 12 12
14 14 14
16 16 16
18
18
ງएவՔ/mm 20 ງएவՔ/mm 20 ງएவՔ/mm 20
18
22
22
22
24 24 24
26 26 26
28 28 28
-5 0 5 -5 0 5 -5 0 5
ഷՔ/mm ഷՔ/mm ഷՔ/mm
(a) ௄ᮖᰤ (b) దᮖᰤళಣ൤ (c) దᮖᰤࣳಣ൤

图 7 多角度相干复合平面波散斑跟踪速度矢量估计分布图
Fig. 7 Multi-angle coherent composite plane wave speckle tracking velocity vector estimation distribution

ͥᝠϙ ͥᝠϙ
0.5 ᄾࠄϙ 0.5 ᄾࠄϙ

ᤴएͥᝠϙ/(mSs -1 ) 0.4 ᤴएͥᝠϙ/(mSs -1 ) 0.4

0.3
0.3
0.2

0.1 0.2
0.1
0.1 0.2 0.3 0.4 0.5 0.1 0.2 0.3 0.4 0.5
ᤴएᄾࠄϙ/(mSs -1 ) ᤴएᄾࠄϙ/(mSs -1 )
(a) ௄ᮖᰤ (b) దᮖᰤళಣ൤

ͥᝠϙ 0.2
0.5 ᄾࠄϙ
0
ᤴएͥᝠϙ/(mSs -1 ) 0.3 ឨࣀ/(mSs -1 ) -0.2
0.4

-0.4
0.2
-0.6
no-skull
0.1 -0.8 skull
corr-skull
-1.0
0.1 0.2 0.3 0.4 0.5 0.1 0.2 0.3 0.4 0.5
ᤴएᄾࠄϙ/(mSs -1 ) ᤴएᄾࠄϙ/(mSs -1 )
(c) దᮖᰤࣳಣ൤ (d) ᤴएͥᝠϙឨࣀࠫඋ

图 8 3 种情况下不同半径速度估计幅值大小及误差对比结果图
Fig. 8 Comparison results of estimated amplitudes and errors of velocity at different radii in three cases