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Les langues disponibles
Les langues disponibles
Ultrasounds
Moduson table
Ref :
223 008
1.2 Step 2: Protocol
Directivity of ultrasonic waves
It is obtained in determining the receiver position on the arc of circle that yield the highest
amplitude for the received signal.
Specify the settings used for the oscilloscope:
In the frame below, draw a diagram of what you see on the oscilloscope screen.
What is the value of the angle that produces the maximum amplitude of the received signal?
The ultrasonic waves are emitted by the transmitter in a zone to be determined.
In the table below, record the amplitude values a of the received signal for the values θ of the
angle that identifies the ultrasonic receiver position.
(θ is negative on the left of the graduation zero and positive on the right).
a
in V
θ
-40
-35
-30
in deg.
ENGLISH
Determination of the reception peak :
•
vertical amplification
•
horizontal sweep
Sound transmission cones:
-25
-20
-15
-10
:
:
-5
0
5
10
54
15
20
25
30
35
40
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