the ultrasonic beam and receives
Fig.1
Fig.2
Fig.3
the echoes the same way as before, then at the end of the reception the motor moves again
the crystal, but now to the place where the line 3 is going to be generated and so forth, this
process is repeated until the crystal reaches the line 7 as is shown in figure 3, now when the
last echo is received, the motor moves the crystal to the initial position in order to generates
the first line of the next ultrasound area.
The mechanic probe with crystals that go around an axis have three crystals separated a
60 angle, as seen in figure 3. At the beginning the crystal 1 is at the site where the first line
(point A) will be generated, from here to (point B), the procedures is the same as the one
done by the pendulum probe, but after the last echo is received from the last line (point B),
the motor move the crystal in the same direction, away from the ultrasound area and at the
same time the crystal 2 is located at the line 1 (point A) in order to generate another ultrasound area, and the process is repeated until the crystal 2 reach the line 7 that is moved
away from the ultrasound area and then the crystal 3 is located in the first line of the coming
ultrasound area, and the process is repeated all the time the probe is sending ultrasonic
lines.
0
ELECTRONIC PROBES (transmission).
Linear sequential array probes, or linear array probes.
We begin to explain the electronic probe which generates a rectangular ultrasonic area
as seen in figure 5,