Appendix 4 Overall Sensitivity; A4.1 Overall Sensitivity Of Sd5 (2Mhz Wired Probe) - EDAN SD5 User Manual

SD5/SD6 Ultrasonic TableTop Doppler User Manual

Appendix 4 Overall Sensitivity

A4.1 Overall Sensitivity of SD5 (2MHz Wired Probe)

Diameter of
Target Distance Reflection
Reflector (d)(mm) Loss A(d)
(mm)
50
1.58
75
A=45.7dB@
2MHz
100
200
50
75
2.38
A=43.2dB@
2MHz
100
200
Doppler Frequency (Hz)
Two-way Attenuation
B=∑B
∑B (T: ultrasonic attenuation
phantom No. B :dB)
a
T 6#6#6#1#
39.8
B 78.3
a
T 6#6#6#
43.3
B 74.6
a
T 6#6#5#4#
45.8
B 72.6
a
T 6#6#4#3#
51.8
B 67.6
a
T 6#6#6#2#
37.2
B 80.0
a
T 6#6#6#1#
40.7
B 78.3
a
T 6#6#6#1#
43.2
B 78.3
a
T 6#6#4#3#
49.2
B 67.6
a
200
+B
V (r.m.s)
a w
S
B B mV
w
(dB) (dB)
0 78.3 70.06
0 74.6 69.39
0 72.6 69.72
0 67.6 54.04
0 80.0 60.47
0 78.3 58.64
0 78.3 63.61
0 67.6 52.58
Velocity of Target
- 43 -
( )
 
V r . m . . s
=    
V (r.m.s) s
C 20 log
( )
n 10
 V r . m . . s 
n
mV
dB
31.43 6.96
29.83 7.33
29.66 7.42
29.35 5.30
31.09 5.78
30.32 5.73
30.74 6.32
29.31 5.08
(cm/s)
Overall Sensitivity
Overall Sensitivity
(S=A(d)+B+C)
dB
125.06
125.23
125.82
124.70
122.98
124.73
127.82
121.88
10