JPS5622891

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DESCRIPTION JPS5622891
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view showing an embodiment
of the present invention. 1 ...... transducer body, 4 ...... signal conveying cable. 6.7 · · · · · · · floats.
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an ultrasonic
transducer used in a fish finder, a depth sounder, and the like, and more particularly to an
ultrasonic transducer having a float like a float so that it can be used by floating on a water
surface. Since this type of ultrasonic transducer with floats can be used by floating on the surface
of the water, it can be easily stored, simplified, etc. However, it has not been possible to properly
measure the current at 9 positions away from the ship. That is, while the transmitter / receiver
body floats and the position to be measured goes away from the ship, the length of the good
signal carrier cable derived from the transmitter / receiver r / 'r', "" "is long, its weight Because
the body of the cable is pulled down toward the hand (ship) immediately because the bulk of the
cable itself sinks down due to its own weight, the measurement at the nine points far away from
the ship is nearly impossible. The present proposal is made in view of the above problems, and
an embodiment of the drawings will be described below. In the drawing, l denotes a transmitter /
receiver main body, and as is well known, it has electrodes 2a, λ) on both sides and is polarized
to form a nine-disc-like piezoelectric element and a front liquid transmission surface of a
piezoelectric element. A pair of vibration reflectors J such as sponge, cork, etc., which covers the
entire circumference of the piezoelectric element − and the vibration reflector 3 and is
connected to both electrodes λa and cobK of the piezoelectric element. Lead wire 41a, 4! It is
molded by injection molding or the like so as to cover one end of the signal transfer cable having
b, and is formed of an insulating outer shell j of round plastic, rubber or the like. The other end of
the signal carrier cable is led to the outside from a conduit j && apos; centrally provided on the
upper surface of the transmitter / receiver main body l, and is mounted on a ship and extended
to a destination transmitter / receiver. In the next KA, the above-mentioned transmitter / receiver
main body I has its sound wave transmitting / receiving surface (lower surface jb of the
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insulating shell) downward K and float on the water (sea) surface, preferably protruding on the
upper surface of the insulating shell! It is a float attached to &. The configuration up to this point
is the same as the conventional one, but this proposal leads to the outside from the transmitter /
receiver main body l and the good signal carrier cable # is a cable as illustrated so that it floats
on the water surface like the transmitter / receiver main body l. A plurality of floats 7... Are
appropriately attached to the portions in contact with the surface of the water at intervals.
According to the above routing method, since the signal carrying cable can be configured to float
on the water surface, there is no concern that the body of the transmitter / receiver can be drawn
to hand by the weight and sinking of the cable as in the prior art. Away from the ship, it is
possible to run at 9 positions and have an '& ゐ effect.
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