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JPS63227490

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DESCRIPTION JPS63227490
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an
underwater sound intensity measuring jig for marine research vessels and the like. (Prior Art)
One of the methods of measuring underwater noise emitted from a ship is underwater acoustic
intensity measurement. When measuring the underwater noise of an actual ship by this
measurement method, a large measuring jig is required from the conditions such as the
measuring object or the measuring environment. FIG. 8 shows an example of the intensity
measurement method. In this method, four hydrophones a as shown in FIG. 9 are used, and the
three-dimensional intensity probe A disposed on the χey * Z axis where the acoustic centers of
each hydrophone a are orthogonal to each other and its origin O The intensity measurement is
carried out using this method, and the magnitude and direction of the synthesized intensity
vector can be obtained by the method shown in FIG. This three-dimensional intensity probe A is
placed on a hydrophone stand B (FIG. 8), and as shown in FIG. 8, the diper C uses the magnet
stand D at the measurement point position on the hull plate E. By mounting, it is fixed to the
measurement point. However, in this method, since the hydrophone stand B is attached by the
diper C at each measurement point, it is unsuitable for a wide range of measurement.
Furthermore, the measurement points need to be docked and marked in advance, which is
difficult to do easily. Also, there is a method of measuring using two floats on the weir side, but
this has the disadvantage of poor workability in terms of working environment. (Problems to be
Solved by the Invention) Acoustic intensity measurement of underwater noise in an actual ship
can be easily carried out over a wide range in the longitudinal direction, width direction and
depth direction of the ship by operation on the ship such as the upper deck. It is an attempt to
provide a measuring jig that can be performed. (Summary of the Invention) A support metal
which is guided by a slide rail installed on an upper deck and is movable in the longitudinal
direction of the ship, and whose end is extended to the outside of the heel side, and an overhang
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of the support metal in the vertical direction A movably supported vertical movement jig, a
hydrophone rail pivotally supported at a lower portion of the vertical movement jig and mounted
so as to be fixed at a predetermined angular position, a hydrophone It consists of a hydrophone
stand movably attached to the movement rail, and the jig for the vertical movement and the
hydrophone stand are made movable by rope operation on the upper deck. (Embodiment) In FIG.
1, S is a bottom shell. 1 is a slide rail provided on the deck of the ship. Reference numeral 2
denotes a support metal which can slide in the longitudinal direction of the ship on the slide rail
1, and in which the hydrophone movement rail 4 equipped with the hydrophone base 5 at the
lower part is pivotally supported vertically The jig 3 is supported.
FIG. 2 is a detailed view around the support metal 2 on the deck. The support 2 is mounted on
the slide rail 1 placed on the ship so as not to fall. That is, the U-shaped seal 6 is fixed to the
upper portion of the slide rail 1. An upper slide guide roller 7 is supported by a bracket 8 on the
side of the support metal 2 with respect to the U-shaped seal 6. Lower slide guide rollers 9 are
provided on both sides of the slide rail 1 at the lower part of the U-shaped seal 6 and are
pivotally supported by a support bracket 10 attached to the lower part of the support 2. A similar
slide mechanism is provided on the upper portions of the left and right slide rails 1 and 1, and
the support metal 2 is supported by the upper and lower sides of the U-shaped seal 6 so that it
can slide. The jig 3 for moving the up and down direction has a ladder shape, and as shown in
FIG. 3, the side frame members 3a on both sides thereof are two guide rollers 11.11. They are
guided by three sides to go up and down. Each guide roller 11.12 is supported by a support
bracket relative to the support 2 respectively. Reference numeral 13 denotes a vertical
movement rope which can be wound by a hoist or the like (not shown) via a sheave 14 fixed at
the lower end to the lower part of the side frame member 3a of the vertical movement jig 3 and
mounted on the support metal 2 Is configured. A hydrophone transfer rope 15 is wound around
sheaves 16a, 16b, 16c and 16d attached to both end corners of the hydrophone transfer rail 4,
and the upper end is wound by a winch or the like provided on a ship (not shown). , Rewindable.
When the hydrophone frame 5 is attached to the hydrophone transfer rope 15 and the transfer
rope 15 is taken up, the hydrophone frame 5 extends outward along the hydrophone transfer rail
4 as viewed in the width direction of the bottom shell S. When it moves and is wound in the
opposite direction, it moves inward (toward the center) as viewed in the width direction. Further,
the hydrophone moving rail 4 is pivotally attached to the lower portion of the vertical moving jig
3 at a position close to the end thereof by a pin 17 and can be rotated to a parallel position with
the bottom inclination direction by this configuration. An angle adjustment frame 18 for the
hydrophone movement rail 4 provided at the lower end of the vertical movement jig 3 includes a
slant frame 18a having a long hole 18c and a vertical frame 18b to which the pin 17 is attached.
It is configured. Then, in a state where the hydrophone moving rail 4 is set parallel to the bottom
outer plate S by rotating around the pin 17, the bolt 19 can be tightened to the long hole 18c to
fix the set position.
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5 and 6 are detailed views of the tip of the hydrophone transfer rail 4 and the hydrophone
mount 5. As shown in FIG. The hydrophone moving rail 4 is composed of two rail members 4a
and 4a (FIG. 6) provided in parallel with a width W (FIG. 5), and a long hole 5a matching the
width W is a hydrophone mount 5 The upper and lower ends of the elongated hole 5a of the
hydrophone rack 5 are guided by the rail members 4a and 4a to slide. Further, the ends of the
hydrophone transfer ropes 15 are fixed to the upper sides of the hydrophone mount 5. The lower
part passes through a U-shaped groove 5 b provided in the hydrophone frame 5. (Method of
adjustment) 1) Jig 3 for moving up and down so that the hydrophone movement rail 4 and the jig
3 for up and down movement can follow the inclination of the bottom shell S with the above
configuration. Since the inclination angle of the hydrophone movement rail 4 with respect to the
upper and lower direction movement ropes 13 can be adjusted by the operation of the vertical
movement rope 13 and the angle adjustment frame 18. Before measurement, the inclination of
the bottom outer plate S in the measurement range is checked from the hull diagram, and set at
an arbitrary angle when the measurement jig is installed. 2) Also, the measurement distance j1
(Fig. 1) from the hull outer plate S is determined in advance, and the vertical movement jig 3
equipped with the hydrophone movement rail 4 is supported so as to be the measurement
distance a. Attach to hardware 2 3) When moving the measurement position further in the
longitudinal direction of the ship, the support 2 is slid on the slide rail 1 and moved. Since the
hydrophone frame 5 is movable in the width direction with respect to the hydrophone transfer
rail 4, the hydrophone frame 5 is moved in the width direction of the ship by operating the
hydrophone transfer rope 15 on the ship. Perform measurement work. (Measurement Method)
Next, an example of the measurement procedure in the measurement area shown in FIG. 7 will be
described. Among the measurement points, one reference position is determined (for example, χ
direction number 1. y direction number 1 ° 2 direction number 1, and thereafter (denoted as χ
@ '/ v z) = (1, 1, 1)), as described above Set the measuring jig. In order to ensure the accuracy of
the measurement position in the state of (1m '/ tz) = (1t1t1), the measurement distance Q1 may
be confirmed with a diper, (χt V e Z) = (1e After the measurement at the position of 1 e 1), in
order to measure (χ * V e Z) = (1 e 2 * 1), operate the hydrophone transfer rope 15 and move it
in the y direction by Δ y After the measurement at the position number 9 in the 6 width
direction to finish 1 next (χ, y. z) In order to measure (1, 9, 2), the mounting of the vertical
movement jig 3 moves the position up and down so that the measurement distance Q2 is
obtained.
After setting, measurement in the width direction is performed in the same manner as in the two
directions 1. After measuring the position number 3 in the two directions, in order to measure
the position number 2 in the 船 direction, the support hardware 2 is moved by χ in the χ
direction on the ship. Measurement is performed at two measurement positions in the y direction
and two directions in the same manner as 1 at two positions in the weir direction. (Effect) A
vertically movable movement recovery guide which is guided by a slide rail installed on the
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upper deck and movable in the longitudinal direction of the ship, and whose end is vertically
movably supported by a supporting metal projecting out to the heel side It consists of a
hydrophone movement rail pivotally supported at the lower part of the tool and fixed to a
predetermined angular position, and a hydrophone mount movably mounted on the movement
rail, said vertical direction Since the moving jig and the hydrophone frame are made movable on
the upper deck by rope operation, the acoustic intensity measurement of the underwater noise of
the ship can be performed in the longitudinal direction, width direction and depth by operation
on the upper deck or the like. It moved easily in a direction and in three dimensions, and it
became possible to measure safely and with high accuracy.
[0002]
Brief description of the drawings
[0003]
FIG. 1 is a measuring jig according to the present invention.
FIG. 2 is a detailed view of the support hardware and the vertical movement jig. 3 is a view in the
direction of the arrow m-m in FIG. FIG. 4 shows the adjustment mechanism of the lower part of
the vertical movement jig. FIG. 5 is a detailed view of the tip of the hydrophone transfer rail. FIG.
6 is a view taken along the line VI-Vl of FIG. FIG. 7 shows an example of the measuring method
by this jig. FIG. 8 shows the installation of the known hydrophone stand. FIG. 9 is a detail view of
the intensity probe. FIG. 10 is an intensity vector diagram measured by the intensity probe. In the
figure; S Bottom plate 1 Slide rail 2 Support hardware 3 Jig for vertical movement 4 Rail for
hydrophone movement 5 Hydrophone base 5a Long hole 5b U-shaped groove 6 U-shaped seal 7
Guide roller 8 Bracket 9 Guide roller Reference Signs List 10 support bracket 11 guide roller 12
guide roller 13 vertical moving rope 14 sheave 15 hydrophone moving rope 16a, 16b, 16c, 16d
sheave 17 pin 18 angle adjustment frame 18a oblique frame 18b vertical frame 18c long hole 19
bolts or more applications Person Sumitomo Heavy Industries, Ltd. Return Agent Patent Attorney
Isamu Ohashi Figure 1 Figure 5 Figure 7 (zfIfl) Figure 8 Figure 9 @
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