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JPS55130477

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DESCRIPTION JPS55130477
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows an embodiment of the present invention,
FIG. 2 shows a reference diagram for explaining the operation of this embodiment, and FIG. 3
shows another embodiment of the present invention. Indicates Correction Akira 54.6. 16
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an ultrasonic
transducer holding device which directs the transmission / reception wavefront of an ultrasonic
transducer mounted on a ship in a specific direction by utilizing the force of a vehicle regardless
of the swing of the ship. In particular, when the cycle of ship's sway is long, always pointing in a
specific direction independently of the sway of ship '' □ ”-A 'J and can make the cycle of ship's
sway become short. Even in this case, it relates to an ultrasonic transducer holding device
capable of changing the pointing direction of the transmission / reception wavefront of the
transducer in synchronization with the sway of the ship and making the transducer search within
the same range as the transducer identified on the bottom searches. . For example, in a fish
finder that searches for water in the vertical direction under water and searches for fish schools
etc., an ultrasonic transducer that emits ultra tte energy into the water or receives a reflected
wave has its transmission / reception surface directly below It was equipped to agree with the
bottom of the ship to point. しかし、こ\。、うKfabFi:、KUiうゎ75. □. When
the ship rolls or pitches, it is not possible to accurately search the underwater situation because
the pointing direction of the transmission / reception wavefront changes in synchronization with
the sway of the ship. 2 In order to determine this failure point km, use gravity to direct the
transmission and reception wavefronts of the ultrasonic transducer in the direction of the ship's
swing 5) sound and vibration. A holding and rice came to be used. These devices are disclosed,
for example, in Japanese Utility Model Publication No. 7080 or U.S. Pat. See, for example, Oj
9.497. This 3, the 0 device holds the vibrator via · -xi '-"jk)" C and always directs the transmission
and reception of the vibrator downward just by the action of gravity even when the ship swings.
It is a thing. In these conventional devices, when the swing period of the ship is long, the
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transducer transmission / reception wavefront can always be directed directly downward, but
when the swing period is short, the vibrator is shaken by the ship. It can not be made
independent of motion, and its transmission / reception wavefront randomly fluctuates
completely independently of the ship's rocking direction, and also irregularly searches a wider
range than when the oscillator is fixed to Japanese paper Therefore, it was not possible to display
an accurate underwater situation. In this invention, the vibrator is suspended by a holding shaft
which is held horizontally and in the same direction so as to be movable and identified, and the
holding shaft. , · Q! -The above problems are solved and the rocking cycle of the ship is solved by
fixing the floating bodies and holding them integrally formed in a dome filled with a viscous
liquid. To provide an ultrasonic transducer holding device capable of obtaining movement
equivalent to the case of the above-mentioned bottom fixed type even in the worst case even
when the movement of the vibrator is long and the movement of the vibrator is independent of
the swing of the ship. With the goal.
Hereinafter, the present invention will be described with reference to the drawings. FIG. 1 shows
an embodiment of the present invention, and FIG. 2 shows an explanatory diagram for explaining
the operation of the embodiment shown in FIG. FIG. 3 shows another embodiment of the present
invention. In FIG. 1, the ultrasonic transducer 1 is held by the support plates 2 and 5 so that the
transmission and reception faces are directed downward. The support plates 2 and 5 are
penetrated by the holding shaft 4 held horizontally and put in place (5) to hold it. The floating
body 5 is held above the holding shaft 4 by the support plates 42 and 6. The floating body 5 and
the vibrator 1 are momentarily balanced as in the following equation. → *: mT1, = In 212 “”
“” tli where ml: mass 11 of the vibrator 1; distance m2 from the center of gravity of the
vibrator 1 to the center of the holding shaft 4: mass 12 of the floating body 12: floating body 5
The distance holding shaft 4 from its center of gravity to the center of the holding shaft 4 is held
horizontally and concavely by the support arms 6 and 7 at its both ends. The upper ends of the
support arms 6 and 7 are fixed to the bottom 8. These components are provided in a dome 10
which is filled with a viscous liquid such as castor oil 9. Hereinafter, those with the same-sign or
symbol indicate the same thing. FIG. 2 (A) shows the relative relationship between the dome 10
and the vibrator 1 in the case where the ship performs an arc movement in a long cycle. The
floating body 5 receives an upward force A by the liquid 9. On the other hand, the floating body
5 and the vibrator 1 receive the pressing force B in the direction perpendicular to the center
1111 c of the dome. 23. Lifting with a long swing cycle of the ship & KR · “” ′ ′ ′ ′
“Press EE” B, 1 :! l) * el / + Of · The transmission and reception wavefront of the oscillator 1
always points in the vertical direction. -FIG. 2 (B) shows the relative relationship between the
vibrator 1 and the dome when the ship makes a circular motion in a short cycle. In the same
figure (in the same manner as in the case of A +, the floating body 5 simultaneously receives the
buoyancy C by the liquid 9 and the pressing force perpendicular to the center line of the dome.
At this time, since the pressing force is larger than the floating force ε, the floating body 5 and
the vibrator 1 are positioned on the center line of the dome. This is equivalent to that the
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vibrator is fixed to the bottom of the ship. When the floating body 5 receives a pressing force, the
vibrator 1 also receives the same pressing force. As described above, according to the present
invention, it is possible to direct the transmission and reception wavefronts of the transducers
directly downward regardless of the swing of the ship, and fix the transducers to the bottom even
in the worst situation. It is possible to provide an ultrasonic transducer holding device that can
be put in the same state as in the case.
In FIG. 3, the vibrator 11 is identified by the bearing 16 of the holding shaft 12. The balance
weight 14 is also fixed to the bearing 13. The holding shaft 12 is horizontally and rotatably held
by the support arms 15 and 16. The gear wheel '' and the holding plate '° force' are fixed to the
wheel and holding shaft '. Another gear 20 is engaged with the gear 17 and is ground by a motor
21 fixed to the balance weight 14. Weights 22.25 are fixed to the lower part of the holding plates
18.19, respectively, and the floating body 24 is held between the upper ends thereof. The
vibrator 11 and the balance weight 14, and the weight 2225 and the floating body 24 are each
momentarily balanced as shown in the following equation. m3 Is = malaf 21 m 515 = m 616 f 3)
Here, m3; mass 13 of the vibrator 11: deviation m4 from the center of gravity of the vibrator 11
to the center of the holding shaft 12; mass 714 of the balance weight 14: center of gravity of the
balance weight 14 Distance to center of m5: mass 15 of storage 22.23; distance of center of
gravity of weight to center of holding axis m6: mass of # body 24. The upper end of the distance
support arm 15.16 at the "float body 0 type" force holding shaft 0 in the middle, and at the end
"J-2" is fixed to the bottom 8. The dome 10 is filled with a viscous liquid. The finger direction of
the transmission / reception wavefront of the vibration system 11 can be set to an arbitrary
direction on the vertical plane by driving the motor 21. In the case of a long swing cycle of the
ship, the pointing direction of the transmission / reception wavefront of the transducer can be
maintained in the above-mentioned specific direction regardless of the swing of the ship. Even
when the ship's sway period becomes short, the oscillators can be changed regularly in
synchronization with the ship's sway as in the case of the embodiment shown in FIG. In the above
embodiment, 8 below the holding shaft, ff1i-Jl'tll "'! JKiff '+ t'L6'lfl: t-F = -1yf: described in the
case of counterbalance, but the viscosity of the liquid and the float or oscillator or the weight
even if the momentary is not balanced By appropriately setting the relationship with the above,
the same effect as in the above embodiment can be obtained.
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