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JPH0685595

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DESCRIPTION JPH0685595
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
sonar device including a transducer unit including a transducer for transmitting an ultrasonic
wave and receiving a reflected wave from a school of fish and a beam combining circuit for
controlling an ultrasonic beam. The present invention relates to an ultrasonic transducer having
a part.
[0002]
2. Description of the Related Art Heretofore, among such ultrasonic transducers, the one shown
in FIG. 2 is known. In FIG. 2, the transducer unit 1 </ b> A includes a vibrator 1 immersed in oil 9
filled in the dome 4.
[0003]
On the other hand, the beam synthesizing circuit unit 2 for controlling the ultrasonic beam is
connected to the transmitter / receiver unit 1A by a signal transmission cable 11 accommodated
in a sliding shaft 7.
[0004]
As described above, in the conventional ultrasonic transducer, the transducer unit 1A and the
beam synthesis circuit unit 2 are separately housed in separate housings. Therefore, a signal
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1
transmission cable 11 for transmitting a large number of signals is required between the two,
thereby increasing the number of wiring steps and causing an increase in cost, and requiring a
large space. The
[0005]
An object of the present invention is to provide an ultrasonic transducer which solves the
problems of the prior art.
[0006]
SUMMARY OF THE INVENTION In order to solve the problems of the prior art as described
above, the present invention provides a transducer unit incorporating a transducer for
transmitting ultrasonic waves and receiving the reflected waves. A beam synthesis circuit unit for
controlling an ultrasonic beam is disposed on at least one same printed circuit board and housed
in the same housing.
[0007]
[Function] Since the transducer unit incorporating the ultrasonic transducer and the beam
synthesis circuit unit controlling the ultrasonic beam are unitedly arranged in a single PC board,
the signal as in the prior art example It is possible to significantly reduce the number of
transmission cables, thereby reducing the number of wiring steps, suppressing the cost increase
factor, and achieving the compactness of the device without requiring a lot of space.
[0008]
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present
invention will be described in detail with reference to FIG.
In FIG. 1, the same or equivalent members as the members described in FIG. 2 showing the
conventional example are given the same reference numerals, and the description thereof is
omitted.
[0009]
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2
The difference from the prior art shown in FIG. 2 is that a transducer unit incorporating a
transducer for transmitting an ultrasonic wave and receiving a reflected wave inside the dome 4
and a beam combining circuit for controlling an ultrasonic beam The point is that the part 2 is
disposed on at least one same printed circuit board (a plurality of printed circuit boards in FIG.
1).
The insulating oil 9 filled between the dome 4 and the vibrator 1 is for not attenuating ultrasonic
waves.
[0010]
A single transducer 1 and a single beam combining circuit 2 are disposed on each one PC board
(printed substrate) 3.
A plurality of such PC boards 3 are arrayed in the radial direction of the entire case including
four domes and the case 5.
The fixation of the PC board 3 is performed by being inserted into the slit portions provided in
the connection holder 6 respectively.
The electrical connection between the transducer 1 and the beam combining circuit 2 is made by
printed wiring provided on the PC board 3.
[0011]
Since a filler (not shown) is provided in the slit portion of the connection holder 6, the oil 9 does
not move upward, and the oil 9 is prevented from entering the beam synthesis circuit 2. It has
become. The dome 4 and the case 5 are configured to be split up and down, and the two can be
separated by removing the hexagonal bolt 10 connecting the two, so that the PC board 3 can be
taken out from the case 5, convenient for maintenance and inspection It is.
[0012]
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3
As described above, since the vibrator 1 and the beam synthesis circuit 2 are integrally arranged,
the number of signal transmission cables 11 as in the conventional example is only four, and one
of the conventional examples can be obtained. It can be reduced to / 5.
[0013]
As described above, according to the present invention, a transducer unit incorporating a
transducer and a beam synthesis circuit unit for controlling an ultrasonic beam are combined
into a single PC board. Because of the arrangement, it is possible to significantly reduce the
number of signal transmission cables as in the prior art, thereby reducing the number of wiring
steps, suppressing the cost increase factor, and eliminating the need for a large space.
Compactification can be achieved.
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