JPH04344428A - Storage of sensor suspension damping device - Google Patents

Abstract

PURPOSE:To damp oscillation due to influence of wave and others on the way so as not to transmit it to a sensor part by storing a disc member made of an elastic member with a diameter of five times larger than the inside diameter of a storage cylinder in the storage cylinder for a marine sensor. CONSTITUTION:After a disc member 13 made of a steel member with elasticity is folded to be threefold rings, two rings of the threefold rings are made smaller and arranged inside of the remaining large ring. This is regarded as a circular shape of the disc member 13 before it is trebly folded, and this circular shape is further folded to be threefold rings, and fivefold rings are made with these threefold rings and the first twofold rings, and by making a diameter which is about one fifth of the diameter before folding, the fivefold rings are stored in a storage cylinder.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention is used as a marine sensor, etc., and a sensor suspended from a buoy structure installed in the water is affected by the movement of the buoy structure due to waves generated on the water surface. The present invention relates to a storage method for storing a damping device that buffers and attenuates vibrations caused by waves in a storage section for an ocean sensor so that the damping device is suspended in a predetermined position without being suspended.

0002

[Prior Art] As a method for storing a sensor suspension damping device in a marine sensor, for example,
This is disclosed in a part of Japanese Patent No. 28, and the conventional storage method will be explained below based on this. FIG. 5 is an overall configuration diagram of an ocean sensor deployed underwater, FIG. 6 is an overall perspective view showing the structure of a conventional damping device, FIG. 7 is a side view of FIG. 6, and FIG. 8
9 is a top view of essential parts of a conventional damping device, and FIGS. 9(A) to 9(C) are explanatory diagrams showing a folding process when storing the unfolded damping device in a housing section for an ocean sensor.

First, the configuration of the ocean sensor will be explained with reference to FIG. 5. 1 is a buoy structure buoyed on the water surface, 2 is a storage cylinder attached to the bottom side of this buoy structure 1, and 3 is this buoy structure. A cable is suspended from the lower surface of the storage cylinder 2, a damping device 4 is attached to the lower end of the cable 3, and a marine sensor 5 is further suspended from the damping device 4 to the lowest end via a cable 6. The main part is the sensor part, which constitutes the marine sensor.Before being deployed underwater, the cable 3, damping device 4,
The sensor section 5 and the cable 6 are housed within the housing cylinder 2.

[0004] Next, the structure and function of the damping device 4 will be explained with reference to FIGS. The disk members 7 are connected by a tube 8, and are fixed to the tube 8 by an anti-sway band 9 so that the disk members 7 are tilted to each other so as not to sway due to the influence of water flow or the like. The disk member 7 has an inner ring 10 to which the tube 8 is attached at the center as shown in FIG.
It is composed of an outer ring 11 that extends in the radial direction around the inner ring 10, and a membrane member 12 made of a synthetic plastic film or the like that is stretched between the inner ring 10 and the outer ring 11. The outer ring 11 is made of an elastic steel material like a spring, can be bent, and has a restoring force to return to its original shape when external pressure is released. Note that the diameter of this outer ring 11 is approximately three times the diameter of the storage cylinder 2. Further, the inner ring 10 introduces water into the tube 8 connected between the inner ring 10 of the other disc member 7, and the influence of the water flow applied to the disc member 7 is reduced. Although adjustments are made, the explanation will be omitted here as it is outside the scope of this case.

When the disc member 7 is stored in the storage cylinder 2, it is folded and stored in a size corresponding to the diameter of the storage cylinder 2, and the ocean sensor is dropped into the water and the damping device 4 is activated. When removed from the storage cylinder 2, the outer ring 11 immediately expands due to the properties described above and forms a ring with a maximum diameter. Therefore, the membrane member 12 supported by the outer ring 11 and the inner ring 10 is expanded into a disk shape, and the disk member 7 is held in a disk shape.

[0006] The action of the disc member 7 developed in the disc shape in this way is that when the ocean sensor is installed underwater, when waves are generated on the water surface and the buoy structure 1 is shaken up and down due to this influence, Accordingly, the damping device 4 also tries to swing up and down in the same way, but since the disk members 7 provided at the upper and lower ends try to move vertically in the water so as to cross the water,
The stretched membrane member 12 receives the drag force of water, and the movement of the disc member 7 is suppressed. This attenuates the vertical movement applied to the sensor part 5 suspended below the damping device 4, and holds the sensor part 5 at a predetermined hanging position.

Note that when the disk member 7 of the above-mentioned damping device 4 is stored in the storage cylinder 2, the steps shown in (A) to (C) in FIG.
After the folding process shown in , it is folded three times,
This makes the diameter of the disc member 7 approximately one third of the original diameter, that is, the diameter in the expanded state. By folding the disk member 7 three times in this way,
The diameter of the damping device 4 is made smaller than the diameter of the storage cylinder 2 so that the damping device 4 can be easily stored in the storage cylinder 2.

[0008]

[Problems to be Solved by the Invention] However, with the above-mentioned conventional method of folding a disc member, the outer diameter of the disc member can only be stored up to approximately three times the inner diameter of the storage cylinder; In order to obtain a damping effect, it is necessary to increase the diameter of the disk member, but disk members larger than this cannot be used because they cannot be stored in the storage cylinder as described above. , there was a problem that further damping effect could not be obtained. Further, as a solution to increasing the diameter of the disc member, it is possible to increase the size of the storage cylinder that stores the disc member, but this has its limitations and cannot be said to be a satisfactory solution. The present invention has been made to solve the above-mentioned problems, and it is possible to store a disc member having a diameter three times or more than the diameter of the storage cylinder without increasing the inner diameter of the storage cylinder, and further, The object of the present invention is to provide a method for storing a sensor hanging damping device that can obtain a large damping effect.

[0009]

[Means for Solving the Problems] In order to achieve the above-mentioned object, the present invention is capable of storing a large damping device in a small storage cylinder by folding a disc member which was conventionally folded three times into five times. This is what I did. In other words, a disc member is provided with a flexible membrane member stretched over an outer ring made of an elastic steel member, and when this disc member is removed from a storage cylinder in which it is stored in a folded state, In a method for storing a sensor suspension damping device, which suspends a sensor section at a predetermined depth underwater by expanding a disk member,
Lifting two opposing locations on the outer peripheral edge of the disc member, bending the disc member, and overlapping these two locations with each other;
Further, two other parts of the outer peripheral edge of the disc member which are shifted by about 90 degrees from these two parts are folded to the back side in the opposite direction to the bending direction and overlapped to form a triple layer of the disc member. Fold it to form a ring.

Furthermore, after this, two predetermined rings of the three rings are made smaller than the remaining one ring, and these two rings are made smaller than the remaining one ring.
Place the two small rings inside the remaining large ring, consider this remaining ring as one circle before folding it three times, and fold this circle further into three rings.
This three-fold ring and the two small rings are combined to form a five-fold ring which is accommodated in a manner corresponding to the inner diameter of the storage cylinder.

[0011]

[Operation] As mentioned above, the disc member is approximately one-fifth of its diameter before being folded, so it can be stored in a storage cylinder with an inner diameter that is one-fifth of the diameter of this disc member. Therefore, a marine sensor is formed by storing both the sensor part and the buoy structure in the storage cylinder. When this ocean sensor is dropped into the water, and each part stored in the storage cylinder is taken out and expanded into the water, the disc member is in a folded state due to the characteristics of the material of the outer ring that forms it. It quickly expands and becomes a disc member about five times the size of the stored state. Therefore, when the buoy structure sways vertically due to waves due to the increased drag generated when crossing water, this oscillation is greatly suppressed, and the vertical oscillations applied to the sensor section are greatly attenuated.

0012

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. Fig. 1 is an explanatory diagram showing the folding procedure of the disc member, Fig. 2 is a top view showing the expanded state of the disc member, and Fig. 3 is Fig. 2
FIG. 4 is a perspective view of a damping device equipped with the disk member shown in FIG. 2. In this embodiment, the structure and function of the ocean sensor are as follows. Since the damping device is substantially the same as the conventional example except for the disk member of the damping device described in 1., the same reference numerals as in the conventional example will be used here, and the explanation thereof will be omitted.

In FIGS. 1 to 4, reference numeral 13 denotes a disk member, and its structure is the same as the conventional one except that when expanded, it has a diameter approximately five times larger than the inner diameter of the storage cylinder 2, as shown in FIG. As shown in FIG. 4, there is an inner ring 10 having a tube 8 shown in FIG. The outer ring 14 is made of a steel material with elasticity like a spring, and can be bent and released from external pressure. It also has the same ability to recover to its original shape when it is damaged. A damping device 16 using this disk member 13 is shown in FIG. It is held in the center of the tube 8, and is fixed so as not to sway due to water flow or the like.

[0014] In this way, the inner diameter of the storage cylinder 2 is approximately 4~
By using the disc member 13 with a diameter that is five times as large, the area of the membrane member 15 of the disc member 13 becomes larger compared to the conventional disc member, which is within three times the inner diameter of the storage cylinder 2. When the drag force generated when crossing water becomes large and the buoy structure 1 is shaken up and down by waves, the ocean sensor components below the storage cylinder 2 are greatly inhibited from shaking up and down in the same way, The vertical vibrations applied to the sensor section 5 are significantly attenuated, and the sensor section 5 is always supported at a predetermined hanging position.

Next, a method of storing the disc member 13 in the storage cylinder 2 in the damping device 16 will be explained with reference to FIGS. 1(A) to 1(G).
Explain using. First, as shown in FIG. 2A, there are two positions on the outer peripheral edge of the disk member 13 in the expanded state, for example, position a shown in the figure, and an end on the opposite side, that is, position b shown in the figure. As shown in (B), lift and fold the two pieces upward, and as shown in (C), one of them, for example, b, is rolled up along the lower side of a, so that they overlap one another. This results in outer ring 1 as shown in the figure.
In step 1, three closed loops A, I, and C are created. After this, the ends c and d at positions perpendicular to the positions a and b of the disk member 13 shown in the state (A),
In other words, (C) has the outer ends of loops A and C, and (D
), fold a and b at right angles to the direction in which they were folded and toward the back surface, and then overlap them so that one of them, for example, c, is inserted under d. As a result, the disk member 13 is folded three times as shown in (E), and its diameter becomes approximately one-third of the original diameter, that is, the diameter in the expanded state. The folding method up to this point is the same as the conventional one.

[0016] From this triple-folded state, as shown in (F), the part of the triple-folded ring that was folded the second time, that is, the part formed by c and d. Pull the two rings left and right to make the two rings smaller, and make the remaining one ring as shown in (G) above.
Let it be a circle that includes the two rings d and d. This is regarded as the disk member 13 before folding shown in (A), and the process of forming a triple ring is repeated once again. As a result, the two rings formed by the first folding operation and pulled on both sides, that is, the rings made by c and d, and the three rings formed by the second folding operation, create a five-fold structure. A ring is formed. In addition, in this second folding operation, it is easier to perform the operation if the two ring portions are regarded as a and b or c and d in the first folding operation. In this way, after five rings are formed, the diameter of the disc member 13 of the damping device 16 is approximately one-fifth of the diameter before folding. Become one.

As described above, each of the two disk members 13 of the damping device 16 can be folded to a diameter that is approximately one-fifth the size using the method described above, so that the storage cylinder 2 can be folded up to approximately five times its inner diameter. Disk member 1 having a diameter of
Therefore, the damping device 16 can accommodate the damping device 16 equipped with the buoy structure 1, the cables 3, 6
and the sensor section 5 are housed in the storage cylinder 2, forming an ocean sensor before deployment.

When the marine sensor with the above structure is dropped into the water and deployed, the damping device 16 begins to expand due to the restoring force of the outer ring 11 made of an elastic material as soon as it is taken out from the storage cylinder 2, and the disk member 13 expands into a circular shape before being bent, and is larger than the outer diameter of the storage cylinder 2, and has a size up to approximately 5 times the inner diameter of the storage cylinder 2, so it more effectively suppresses agitation caused by waves generated on the water surface. Demonstrate strength.

Note that the procedure for folding the disc member 13 three times as described above shows the basics of folding, and as a result, a portion of the outer peripheral edge at the two places that were first pinched Overlapping, about 9 points from these two parts
It is sufficient to bend the two parts that are 0° apart from each other in the direction opposite to the direction in which they were bent, and the folding method is such that it can be quickly unfolded without getting tangled when taken out from the storage cylinder 2. It is obvious that there are other procedures that are slightly modified, such as a method of twisting the disc member 13.

[0020]

As explained above, according to the present invention, a damping device including a disk member made of a flexible membrane member stretched over an outer ring made of an elastic steel member, After folding the disc member into a triple ring,
Two predetermined rings out of these three rings are smaller than the remaining one ring, and these two small rings are placed inside the remaining one large ring, and this remaining ring is made into three rings. This circle is further folded into three rings, and these three rings and the two small rings are combined to form a five-fold ring on the inner diameter of the storage cylinder. Since the damping device has a disk member with a diameter approximately 4 to 5 times larger than the inner diameter of the storage cylinder, it can be stored in three layers using conventional disk members. It can be easily stored in a storage cylinder of the same size as the previous one.

[0021] Therefore, even if the buoy structure is shaken by waves generated on the water surface, the area of the disc member is large, so that
Because it traverses the water over such a large area, it is subject to a large amount of water resistance, and its oscillation is greatly attenuated by the water's drag. As a result, even if the buoy structure sways due to the influence of waves on the water surface, the oscillation is absorbed and attenuated by the damping device, so the effect does not reach the lowest sensor section, and the sensor section is always stable. The effect is that the device can be held at a predetermined hanging position.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing a procedure for folding a disk member in this embodiment.

FIG. 2 is a top view showing the expanded state of the disc member.

FIG. 3 is a configuration diagram of an ocean sensor including the disc member shown in FIG. 2.

4 is a perspective view of a damping device including the disk member also shown in FIG. 2. FIG.

FIG. 5 is an overall configuration diagram of a conventional ocean sensor showing a state in which it is deployed underwater.

FIG. 6 is an overall perspective view showing the structure of a conventional damping device.

FIG. 7 is a side view of FIG. 6;

FIG. 8 is a top view of essential parts of a conventional damping device.

FIG. 9 is an explanatory diagram showing a conventional folding process of a disc member.

[Explanation of symbols]

1 Buoy structure 2 Storage cylinder 13 Disk member 14 Outer ring 15 Membrane member 16 Attenuation device

Claims (2)

[Claims] [Claim 1] A storage cylinder comprising a disc member made of a flexible membrane member stretched over an outer ring made of an elastic steel member, and storing the disc member in a folded state. In a method for storing a sensor suspension damping device, in which the disk member is expanded when taken out and the sensor unit is suspended at a predetermined depth underwater, the outer ring of the disk member is folded to form a triple ring, and then, Two predetermined rings out of these three rings are made small rings, and these two small rings are placed inside the remaining large ring, and this remaining ring is regarded as one circular ring, and furthermore, this is folded to form a three-fold ring, and the three-fold ring and the two small rings are combined to form a five-fold ring and are stored in a manner corresponding to the inner diameter of the storage cylinder. How to store the damping device. 2. A method of folding a disc member to form a triple ring is to lift two opposing parts of the outer peripheral edge of the disc member, fold the disc member, and overlap these two parts with each other. , Furthermore, two other locations on the outer peripheral edge of the disk member that are approximately 90 degrees apart from these two locations,
2. The method for storing a sensor suspension damping device according to claim 1, wherein the sensor suspension damping devices are folded to the back side in a direction opposite to the bending direction and overlapped.