Jeulin Moduson 2 Mode D'emploi page 19

Ultrasounds
®
Moduson 2 transmitter telemeter 12V
Ref : 222 082
2 Measuring the wave length of a single receiver
2.1 Experiment
• Set the transmitter to the "continuous" position
• View the transmitter signal on channel A of the oscilloscope, and the receiver signal on
2.2 Synchronise the oscilloscope on the transmitter signal
• Locate the initial position of the receiver.
• Move the receiver away (or closer to) from the source and observe the scrolling of 10
2.3 Note
The relation
oscilloscope.
with T = 2.5 x 10 -
and
we get C = 331 ms -1 .
3 Measuring distance using ultrasound waves
3.1 Objectives
To know the position of a small character enclosed in an opaque box. For this we will use
ultrasound waves employed in the sonar and scan techniques.
The On/Off switch is placed in the On position and the Continuous –
Bursts reversing switch on Bursts. The Long bursts – Short bursts
reversing switch is placed in the Short bursts position.
ENGLISH
channel B. (time base: 10 µs/div)
periods on the oscilloscope.

= C.T helps calculate the phase velocity C. The period T is measured with the
5
s.

= 8.29 mm at 20° C.
Source signal
Source signal
Receiver signal
Receiver signal
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