JP2019182184A - Depth adjustment system and depth adjustment method - Google Patents

Abstract

To adjust a depth of a floating body without changing a length of a rope body.SOLUTION: A depth adjustment system 1 includes: a platform; a hollow rope body 3 with one end side retained to the platform; a floating body 4 connected with the other end side of the rope body 3 and floating in water; a linear weight 6 capable of being inserted in an inner space of the rope body 3; a drum device 5 provided on the platform and capable of feeding out and winding up the weight 6; and a controller 7. Sinking of the float body 4 is carried out by feeding out the weight 6 from the drum device 5 and increasing a portion into which the weight 6 is inserted in the rope body 3. Floating of the floating body 4 is carried out by reducing the portion into which the weight 6 is inserted in the rope body 3 by winding up the weight 6 into the drum 5.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a depth adjustment system and a depth adjustment method for adjusting the depth of a floating body moored or towed while floating in water.

  One of the methods to acquire various underwater information, such as water temperature measurement, measurement of components dissolved in water, observation or search of objects at the bottom of the water, is desired to float on the floating body by towing or mooring Measurement equipment used for measurement of underwater information is mounted, and underwater information measured by the measurement equipment is acquired in association with a position where a floating body is arranged at the time of measurement.

  By the way, when acquiring underwater information using a floating body, it is necessary to arrange | position the floating body equipped with the measuring device in the depth where acquisition of underwater information is desired. At this time, when it is required to acquire underwater information at a plurality of different depths in water, it is necessary to move the floating body to each depth at which acquisition of underwater information is desired.

  For this reason, a floating body used for obtaining this type of underwater information is required to have a function capable of adjusting the depth.

  As one of the techniques for making it possible to adjust the depth of the floating body, it is conceivable that the floating body includes a ballast tank or another type of buoyancy adjusting device. However, when the floating body is provided with a buoyancy adjusting device, the actual situation is that the floating body is enlarged.

  On the other hand, reducing the size of the floating body by omitting the buoyancy adjustment device from the structure of the floating body leads to a decrease in the resistance that the floating body generates in the water. This is advantageous in reducing the strength required at the connection point.

  For example, as a technique for enabling the depth of the floating body to be adjusted without providing a buoyancy adjustment device in the floating body, for example, a towing body that is a floating body towed from a ship via a cable, That is, a method of adjusting the depth of the towed body by adjusting the towing speed has been conventionally proposed (for example, see Patent Document 1).

Japanese Patent No. 2716078

  By the way, the towline receives tension due to the resistance of water generated in the towed towed body. The magnitude of water resistance generated in the towed body changes depending on the increase or decrease in the water speed of the towed body.

  Furthermore, the towline has a shape that is loosened by its own weight between the ship and the towed body, but the amount of slack varies depending on the length of the towline and the amount of tension acting on the towline. .

  For this reason, the method of adjusting the towed body depth by adjusting the length of the tow rope and the towed speed disclosed in Patent Document 1 includes a change in the length of the towed rope and a change in the water velocity of the towed body. However, it depends on each other, and therefore, the responsiveness of the change in the depth of the towed body to the change in the length of the towline is low.

  Therefore, when adjusting the depth of the towed body, the adjustment range of the length of the towed rope becomes large, and it may be difficult to grasp the actual position of the towed body.

  However, when collecting underwater information using a measuring device mounted on the towed body, it is desired to know more accurately the position where the towed body is located when the towed body collects information.

  Accordingly, the present invention is directed to a floating body floating in water while being towed or moored via a rope body, and a depth adjustment system capable of adjusting the depth without changing the length of the rope body, and It is intended to provide a depth adjustment method.

  In order to solve the above problems, the present invention provides a platform, a hollow cable body having one end held on the platform, a floating body connected to the other end side of the cable body and floating in water, A linear weight that can be inserted into an internal space, a drum device that is mounted on the platform and that can feed and take up the weight, and a control device, and the control device includes: A depth adjustment system having a configuration having a function of giving a command for feeding a weight and a function of giving a command for winding the weight.

  The control device includes a function for setting a target depth at which the floating body is to be arranged, a function for comparing the current depth of the floating body with the target depth, and the current depth of the floating body to match the target depth. A function of a determination process for determining whether the floating body is required to hold a depth and a rise and a sink, and a function of giving a command to feed the weight to the drum device when the determination process determines that a lift is necessary; When it is determined by the determination process that sedimentation is necessary, the drum device may have a function of giving a command to wind the weight.

  The cord may have a function of allowing water to permeate inward and outward.

  The platform may be configured as a ship that sails on the water surface or a sailing body that sails in water.

  The platform may be configured as a buoy moored in water.

  When sinking a floating body connected to the other end of a hollow cable body having one end held by the platform, a linear weight that can be inserted into the internal space of the cable body from the drum device provided in the platform When the floating body is floated by performing a process of increasing the length dimension of the portion where the weight is inserted into the internal space in the longitudinal direction of the cord body, the weight is wound around the drum device. By taking this, a depth adjustment method is performed in which the weight in the longitudinal direction of the cord body is processed to reduce the length dimension of the portion inserted into the internal space.

  According to the depth adjusting system and the depth adjusting method of the present invention, the depth is adjusted without changing the length of the rope for a floating body floating in water while being towed or moored via the rope. be able to.

It is a figure which shows 1st Embodiment of a depth adjustment system. It is a figure which expands and shows the drum apparatus in the depth adjustment system of FIG. It is a figure for demonstrating the use condition of the depth adjustment system of FIG. It is a figure which shows 2nd Embodiment of a depth adjustment system. It is a figure which shows 3rd Embodiment of a depth adjustment system. It is a figure which expands and shows the drum apparatus in the depth adjustment system of FIG. It is a figure which shows 4th Embodiment of a depth adjustment system.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

[First Embodiment]
FIG. 1 is a partially cut schematic side view showing a first embodiment of a depth adjustment system. FIG. 2 is an enlarged view of the drum device in the depth adjustment system of FIG. FIG. 3 shows an example of use of the depth adjustment system, FIG. 3 (a) is a schematic diagram showing a state in which the floating body is levitated, and FIG. 3 (b) is a schematic diagram showing a state in which the floating body is sunk. It is.

  This embodiment shows an example applied to a configuration in which a floating body is towed as an example of a depth adjustment system.

  The depth adjustment system of this embodiment is shown by the code | symbol 1 in FIG. 1, the ship 2 as a platform, the hollow cable body 3 by which the one end side of the longitudinal direction was connected to the ship 2, and other than the cable body 3 The floating body 4 connected to the end side, the drum device 5 installed in the ship 2, and the drum device 5 is wound from one end side in the longitudinal direction, and the other end side is from the opening 3a on one end side of the rope body 3. A linear weight 6 disposed so as to be insertable inside the cable body 3 and a control device 7 for giving a command to the drum device 5 are further provided.

  In the present disclosure, the platform is a reference point for adjusting the depth of the floating body 4. In the present embodiment, the platform is a ship 2 that includes the propulsion device 8 and a steering device (not shown) and travels on the water surface W.

  The vessel 2 may be manned or unmanned as long as the floating body 4 can be towed along the set route. In FIG. 1, the propulsion device 8 of the ship 2 is shown as a propeller type for convenience of illustration, but it is needless to say that the propulsion device 8 may adopt any type other than the propeller type. Similarly, it is needless to say that any type of steering device for the ship 2 may be adopted.

  In the internal space of the cable body 3, the cross-sectional shape in the plane perpendicular to the longitudinal direction is set to a shape and size including the cross-sectional shape in the plane perpendicular to the longitudinal direction of the weight 6. The cord body 3 is configured to include this internal space so as to extend from the opening 3a on one end side toward the other end side in the longitudinal direction. The internal space in the cable body 3 may be provided over the entire length in the longitudinal direction, or may be provided in a range excluding a part on the other end side of the cable body 3.

  As shown in FIG. 2, the cable body 3 has a cylindrical guide 9 provided on the ship 2 covered with an opening 3 a on one end side, and one end side of the cable body 3 is near the guide 9 or the guide 9. It is attached to a connection portion (not shown).

  In the depth adjustment system 1 of the present embodiment, the other end side of the weight 6 wound around the drum device 5 is arranged so as to pass through the inside of the guide 9 in the ship 2. Thereby, when the weight 6 is drawn out from the drum device 5, the drawn-out weight 6 is inserted into the internal space from one end side of the rope body 3 through the opening 3a.

  Furthermore, in this embodiment, the cable body 3 is provided with water permeability that allows water to permeate inward and outward, and allows water existing outside the cable body 3 to enter the internal space of the cable body 3. Possible configuration.

  In the configuration in which the cable body 3 has water permeability, when the weight 6 is not inserted in the internal space of the cable body 3, the internal space of the cable body 3 can be made equal to the external water pressure and the pressure equalization. It can suppress that the rope body 3 deform | transforms so that it may be crushed with a hydraulic pressure. Further, when the weight 6 is inserted into the internal space of the rope body 3, it is necessary to discharge an amount of water corresponding to the insertion amount of the weight 6 from the internal space of the rope body 3. 3 can be easily performed using the water permeability of 3. Therefore, according to this configuration, the process of inserting the weight 6 into the internal space of the cable body 3 can be performed smoothly, and the energy required for the process of inserting the weight 6 can be reduced.

  When the purpose of use of the floating body 4 is, for example, acquisition of underwater information, the floating body 4 may be configured to include a measuring device used for measuring desired underwater information. It should be noted that the purpose of use of the floating body 4 is not limited to the acquisition of underwater information, and the configuration of the floating body 4 may be changed as appropriate according to the purpose of use.

  The weight and volume of the floating body 4 are set so as to have positive buoyancy. Note that the floating body 4 does not include a buoyancy adjustment mechanism that changes the buoyancy by changing the weight or volume.

  The posture of the floating body 4 floating in the water is determined based on the positional relationship between the floating center and the center of gravity. Further, the floating body 4 has a posture in which resistance is reduced when arranged in the water flow based on the shape of the floating body 4 itself, and the front end side arranged in the direction of arrival of the water flow is determined in this posture.

  The other end side of the cable body 3 is connected to the front end side of the floating body 4. Thereby, the floating body 4 becomes the structure connected to the ship 2 via the rope body 3. FIG. Therefore, when the ship 2 is sailed in this state, the floating body 4 is towed to the ship 2 via the cable body 3 and assumes a posture in which the front end side is directed in the traveling direction.

  The connecting portion between the other end side of the cable body 3 and the floating body 4 is configured to allow an angle change in the vertical direction and, further, a joint (not shown) that allows the angle change in the horizontal direction and rotation to be allowed. Is preferred. According to the configuration including this joint, it is possible to suppress the change in the angle near the other end of the cable body 3 caused by the slack of the cable body 3 from affecting the posture of the floating body 4.

  As shown in FIG. 2, the drum device 5 is connected to one end side in the longitudinal direction of the weight 6, a weight drum 10 in which the weight 6 is wound from one end side, and a drive device (not shown) that rotationally drives the weight drum 10. It is set as the structure provided with.

  Thereby, the drum device 5 feeds the weight 6 wound around the weight drum 10 by rotating the weight drum 10 in the feeding direction of the weight 6 (counterclockwise direction in FIG. 2) by the driving device, The guide 9 can be inserted into the internal space from one end side of the cable body 3.

  On the other hand, the drum device 5 is previously driven out of the weight drum 10 and inserted into the inner space of the cable body 3 by rotationally driving the weight drum 10 in the winding direction of the weight 6 (clockwise direction in FIG. 2) by the driving device. The weight 6 is pulled out from the cable body 3 and can be wound around the weight drum 10.

  Therefore, in the depth adjustment system 1 of the present embodiment, the weight 6 is fed out and wound by the drum device 5, so that the weight 6 is inserted into the internal space in the longitudinal direction of the cord body 3. The length dimension can be increased or decreased.

  The weight 6 is made of a material having a density higher than that of water existing in a region to which the floating body 4 is towed, for example, when the floating body 4 is towed in a certain region of the sea. In addition, the weight 6 has a flexibility that can be wound around the weight drum 10 and strength in the tensile direction, and is long so that it can be pushed into the internal space of the cable body 3 by being fed out from the drum device 5. It has properties that are difficult to compress in the direction. As the weight 6 having such properties, for example, a metal wire may be used. Needless to say, the weight 6 may be made of a material or a structure other than a metal wire as long as it has the predetermined properties.

  When the weight 6 is inserted into the cable body 3, the portion of the cable body 3 where the weight 6 is inserted increases in weight as compared with the portion where the weight 6 is not inserted, that is, the weight 6 is inserted. The gravity which acts on the part which increases is increased.

  The ship 2 has buoyancy that floats on the water surface W even when the weight 6 is wound around the drum device 5 to the maximum extent.

  Therefore, under the condition that the towing speed of the floating body 4 by the ship 2 is constant, the depth at which the floating body 4 floats depends on the gravity acting on the floating body 4 and the rope body 3, the buoyancy acting on the floating body 4 and the rope body 3, It is determined by balancing the vertical component of the tension of the body 3.

  As described above, since the rope 3 can put water into the internal space, the volume in which the rope 3 excludes water does not change regardless of whether or not the weight 6 is inserted. The working buoyancy does not change.

  Therefore, in the present embodiment, as shown in FIG. 3A, the state in which the weight 6 is not inserted into the cable body 3 minimizes the gravity acting on the cable body 3, and thus the depth at which the floating body 4 floats. Is the smallest (shallow). The depth in this state is hereinafter referred to as the minimum depth Da of the floating body 4.

  On the other hand, in the present embodiment, as shown in FIG. 3B, the state in which the weight 6 is inserted to the maximum in the cable body 3 maximizes the gravity adopted for the cable body 3 including the weight 6. The depth at which the floating body 4 floats is the largest (deep). The depth in this state is hereinafter referred to as the maximum depth Db of the floating body 4.

  Therefore, in this embodiment, when a depth range in which the floating body 4 is desired to be operated, for example, a depth range in which underwater information is desired to be acquired by a measurement device mounted on the floating body 4 is determined, the minimum depth of the floating body 4 is set to the minimum value of the depth range. Various parameters relating to the floating and sinking of the floating body 4 may be set so that Da corresponds and the maximum depth of the floating body 4 corresponds to the maximum value of the depth range. Parameters relating to the floating and sinking of the floating body 4 include the weight and volume of the floating body 4, the weight and volume and length of the rope body 3, the density of the weight 6, and the weight per unit length.

  FIG. 3A shows an example of a state where the floating body 4 floats in the vicinity of the water surface W when the minimum depth Da, but the floating body 4 floats when the minimum depth Da is the water surface W. Or a depth away from the water surface W.

  Thereby, in this embodiment, the depth of the floating body 4 is changed within the range from the minimum depth Da to the maximum depth Db by changing the length of the weight 6 that is fed out from the drum device 5 and inserted into the cable body 3. Can be changed.

  In this embodiment, since the rope body 3 is configured to have water permeability, the weight 6 inserted into the rope body 3 comes into contact with water. In view of this point, in the present embodiment, it is preferable that the section of the ship 2 where the drum device 5 is disposed has a water immersion structure. According to this configuration, it is not necessary to provide the drum device 5 or the hull of the ship 2 with a seal structure for obtaining water-tightness in a path where the rope body 3 is arranged or a place where the weight 6 is put in and out. it can.

  Of course, the drum device 5 may be provided in a state where it is not immersed in water. In this case, what is necessary is just to set it as the structure suitably provided with the seal structure for obtaining watertightness in the location where the weight 6 in the ship 2 is taken in and out. Further, the cable body 3 and the weight 6 or the weight 6 may be arranged on a route passing through a position above the water surface W.

  The control device 7 has a function of receiving a detection result of the current depth of the floating body 4 from a depth detection device (not shown) that detects the depth of the floating body 4. Note that the depth detection device may be a depth meter provided in the floating body 4 or detects the relative position of the floating body 4 using an acoustic signal or the like from the ship 2 side to detect the depth of the floating body 4. It may be a device.

  The control device 7 further has a function of setting a target depth at which the floating body 4 is to be arranged, a function of comparing the current depth of the floating body 4 received from the depth detection device with the target depth, and a result of the comparison. In order to make the current depth coincide with the target depth, the function of the determination process for determining whether the floating body 4 is to be maintained in the depth, ascending or sinking, and when the determination process determines that the ascending is necessary, the drum device 5 has a function of giving a command for feeding the weight 6 and a function for giving a command for winding the weight 6 to the drum device 5 when it is determined that sedimentation is required by the determination process.

  In addition, when performing the said determination process, the control apparatus 7 may be provided with a dead zone according to the precision requested | required for operation which arrange | positions the floating body 4 to target depth.

  Thereby, in the depth adjustment system 1 of this embodiment, when there is not much difference between the depth of the floating body 4 detected by the depth detection device and the target depth, the floating body 4 is held at the same depth. On the other hand, when there is a difference between the depth of the floating body 4 detected by the depth detection device and the target depth exceeding the dead zone, the operation of the drum device 5 according to the command from the control device 7 is performed. 4 floats or sinks, and the depth of the floating body 4 is adjusted to match the target depth.

  Therefore, in the depth adjustment method implemented using the depth adjustment system 1 of the present embodiment, when the floating body 4 is submerged, the weight 6 is fed out from the drum device 5 installed in the ship 2 and the longitudinal direction of the rope body 3 The process of increasing the length dimension of the portion where the weight 6 is inserted into the internal space is performed. On the other hand, when the floating body 4 is levitated, the weight 6 is wound around the drum device 5 installed in the ship 2 so that the length dimension of the portion in which the weight 6 in the longitudinal direction of the rope body 3 is inserted into the internal space is set. Process to decrease.

  Therefore, according to the depth adjustment system and the depth adjustment method of the present embodiment, it is necessary to change the length of the rope body 3 for the floating body 4 floating in the water while being towed to the ship 2 via the rope body 3. And the depth can be adjusted.

  Thus, in the depth adjustment system and the depth adjustment method of the present embodiment, when the depth of the floating body 4 towed by the ship 2 is changed, it is not necessary to change the length of the rope 3. Compared to the technique involving changing the length of the towing line as shown in Document 1, it is possible to more easily grasp the actual position of the floating body 4.

  For this reason, when acquiring underwater information using the measuring device mounted in the floating body 4, it becomes possible to know more accurately the position where the floating body 4 is located at the time of collecting information.

[First Application Example of First Embodiment]
In the said 1st Embodiment, the cable body 3 demonstrated as a structure provided with water permeability.

  On the other hand, the rope body 3 may have a configuration that does not have water permeability.

  Thus, when the cable body 3 does not have water permeability, when the cable body 3 is disposed in water, a water pressure is applied to the cable body 3 from the outside. For this reason, the cable body 3 may have a rigidity that does not cause a deformation to be crushed even when water pressure at a depth at which the floating body 4 is assumed to be disposed acts. According to this configuration, the internal space of the cable body 3 is filled with air when the weight 6 is not inserted. Therefore, in this state, the buoyancy of the rope body 3 in water can be increased by the amount of air present in the internal space of the rope body 3.

  On the other hand, when the weight 6 is inserted into the internal space of the cable body 3, air corresponding to the volume of the inserted weight 6 is excluded from the internal space of the cable body 3. In this case, if a gap is formed between the peripheral wall of the internal space of the rope body 3 and the outer peripheral surface of the weight 6, air is discharged from the internal space of the rope body 3 through this gap. be able to.

  Therefore, in the case of this application example, a greater buoyancy can be applied to the portion of the cable body 3 where the weight 6 is not inserted, as compared with the first embodiment. On the other hand, the buoyancy acting on the portion where the weight is inserted into the cable body 3 is the same as in the first embodiment.

  Therefore, in the case of this application example, the depth adjustment of the floating body 4 can be performed in the same manner as in the first embodiment even if the buoyancy of the floating body 4 is reduced as much as the buoyancy of the rope body 3 is increased. For this reason, this application example can be made advantageous when the size of the floating body is reduced.

  In this application example, the weight 6 does not come into contact with water even when the weight 6 is inserted into the cord body 3. Therefore, in this application example, the drum device 5 may be arranged in a section filled with air in the ship 2. What is necessary is just to make it provide the seal structure for obtaining watertightness in the location where the rope body 3 in the ship 2 penetrates, or the location where the rope body 3 was connected.

  Also according to this application example, the same effect as that of the first embodiment can be obtained by implementing the depth adjustment method for the floating body 4 as in the first embodiment.

[Second Application Example of First Embodiment]
In the first embodiment, as illustrated in FIG. 1, the ship 2 that travels on the water surface W is illustrated as a platform for towing the floating body 4 via the cable body 3.

  On the other hand, although not shown, the platform for towing the floating body 4 via the cable body 3 may be a traveling body that travels underwater.

  Also according to this application example, the same effect as that of the first embodiment can be obtained by implementing the depth adjustment method for the floating body 4 as in the first embodiment.

[Second Embodiment]
4A and 4B show a second embodiment of the depth adjustment system. FIG. 4A is a partially cut schematic side view showing a state where the floating body is levitated, and FIG. FIG.

  4 (a) and 4 (b), the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  The depth adjustment system of the present embodiment is indicated by reference numeral 1A in FIGS. 4A and 4B. In the same configuration as that of the first embodiment, the floating body 4 is replaced with a structure towed by the ship 2, and the floating body 4 is moored.

  Therefore, this embodiment is configured to use a buoy 13 moored via a mooring line 12 and anchored in the anchor 11 disposed on the bottom of the water as a platform serving as a reference point for depth adjustment of the floating body 4. ing.

  The floating body 4 is connected to the buoy 13 via the hollow cable body 3. Thereby, the floating body 4 is moored to the buoy 13 through the rope body 3.

  In addition, since the connection part of the rope body 3 with which the buoy 13 was equipped, the drum apparatus 5, and the weight 6 are the structures similar to the corresponding thing in the ship 2 of 1st Embodiment, description is abbreviate | omitted.

  The buoy 13 has a balance between the buoyancy acting on the buoy 13 and the gravity so that the buoy 13 has a positive buoyancy even when the weight 6 is wound around the drum device 5 to the maximum extent.

  FIG. 4A shows an example in which the floating body 4 floats in the vicinity of the water surface W when the minimum depth Da, but the floating body 4 floats when the minimum depth Da is the water surface W. Or a depth away from the water surface W.

  FIG. 4B shows an example of a state where the floating body 4 floats at the same depth as the buoy 13 when the floating body 4 has the maximum depth Db, but the floating body 4 floats at the maximum depth Db. , May be above the buoy 13, may be below, or near the bottom of the water.

  According to the depth adjustment system of the present embodiment configured as described above, the depth adjustment method can be performed on the moored floating body 4 as in the first embodiment, and the same as in the first embodiment. An effect can be obtained.

[Third Embodiment]
FIG. 5 is a partially cut schematic side view showing a third embodiment of the depth adjustment system. 6 is an enlarged view of the drum device in the depth adjustment system of FIG.

  5 and 6, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  The depth adjustment system of the present embodiment is denoted by reference numeral 1B in FIG. 5. In the same configuration as that of the first embodiment, the vessel 2 is replaced with a configuration in which the drum device 5 for the weight 6 is provided in the vessel 2. In addition to the function of feeding and winding the weight 6, the drum device 14 having the function of feeding and winding the cord body 3 is provided.

  As shown in FIG. 6, the drum device 14 is connected to one end side in the longitudinal direction of the cord body 3, and includes a cord drum 15 that winds the cord body 3 from one end side, and the cord drum 15 that rotates. The weight drum 10 is the same as that of the first embodiment, and the drive device (not shown) that rotationally drives the weight drum 10 is provided inside the cord drum 15.

  The feeding and winding of the rope body 3 by the rotational driving of the rope drum 15 can be performed independently of the feeding and winding of the weight 6 by the rotational driving of the weight drum 10.

  Thereby, in the depth adjustment system 1B of this embodiment, the length dimension of the rope body 3 which connects the ship 2 and the floating body 4 is adjusted by performing the delivery of the rope body 3 by the drum apparatus 14, and winding-up. can do.

  Accordingly, the depth adjustment system 1B of the present embodiment can be used in the same manner as in the first embodiment to obtain the same effect, and in addition, the length of the rope 3 connected to the ship 2 and the floating body 4 is increased or decreased. By doing so, it becomes possible to expand and contract the vertical width of the depth range in which the floating body 4 is raised and lowered.

[Fourth Embodiment]
FIG. 7 is a partially cut schematic side view showing a fourth embodiment of the depth adjustment system.

  In FIG. 7, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  The depth adjustment system of the present embodiment is indicated by reference numeral 1C in FIG. 7. In the same configuration as that of the first embodiment, the floating body 4 is replaced with a configuration in which the other end side of the cable body 3 is simply connected to the floating body 4. However, the configuration includes the rope body drum device 16 having the function of feeding and winding the rope body 3.

  The cord body drum device 16 has a configuration in which the other end side in the longitudinal direction of the cord body 3 is connected, and the cord body 3 is wound so as to be fed out from the other end side.

  The feeding and winding of the rope body 3 by the rope body drum device 16 can be performed independently of the feeding and winding of the weight 6 by the drum device 5 on the ship 2 side.

  Thereby, in the depth adjustment system 1C of this embodiment, the length dimension of the rope body 3 which connects the ship 2 and the floating body 4 by feeding out and winding the rope body 3 by the rope body drum device 16. Can be adjusted.

  Accordingly, the depth adjustment system 1C of the present embodiment can be used in the same manner as in the first embodiment to obtain the same effect, and in addition, the length of the rope body 3 connecting the ship 2 and the floating body 4 can be obtained. By increasing / decreasing, it becomes possible to expand and contract the vertical width of the depth range in which the floating body 4 is raised and lowered.

  In addition, this invention is not limited only to each said embodiment and each application example.

  The shape of the floating body 4 is for convenience of illustration, and does not reflect the actual shape of the floating body 4.

  Of course, the floating body 4 may be of any purpose other than the acquisition of underwater information.

  In each of the first, third, and fourth embodiments, the shape of the illustrated ship 2, the arrangement of the propulsion device 8 in the ship 2, the dimensional ratio between the ship 2 and the drum devices 5, 14, the ship 2 and the floating body 4 The dimensional ratio and the distance from the ship 2 to the floating body 4 are for convenience of illustration, and do not reflect actual arrangement, dimensional ratio, distance, and the like.

  In the second embodiment, the shape of the buoy 13 illustrated, the dimensional ratio between the buoy 13 and the drum device 5, the dimensional ratio between the buoy 13 and the floating body 4, and the distance from the buoy 13 to the floating body 4 are shown for convenience of illustration. It does not reflect the actual shape, dimensional ratio, distance, etc.

  In FIG. 2, the drum device 5 shows a state in which the weight 6 is spirally wound around the outer periphery of the weight drum 10 for convenience of illustration, but the drum device 5 is wound around the outer periphery of the weight drum 10 while shifting the position of winding in the axial direction. Of course, it may be good.

  6, the drum device 14 shows a state in which the cord body 3 is spirally wound around the outer periphery of the cord drum 15 and a state in which the weight 6 is spirally wound around the outer periphery of the weight drum 10 in FIG. However, the cable body 3 may be wound around the outer periphery of the cable drum 15 while shifting the winding position in the axial direction, and the weight 6 is wound around the outer periphery of the weight drum 10 while shifting the position wound in the axial direction. Of course, it may be good.

  In each of the third and fourth embodiments, the buoy 13 in the second embodiment may be adopted as a platform instead of the ship 2.

  Any platform other than the ship 2 and the buoy 13 may be adopted as long as it is a reference point for the depth adjustment of the floating body 4.

  Of course, various modifications can be made without departing from the scope of the present invention.

2 ship (platform), 3 cable body, 4 floating body, 5 drum device, 6 spindles, 7 control device, 13 buoy (platform), 14 drum device

Claims (6)

Platform,
A hollow cable body having one end held on the platform;
A floating body connected to the other end of the cable body and floating in water;
A linear weight that can be inserted into the inner space of the cord;
A drum device mounted on the platform and capable of feeding and winding the weight;
A control device,
The depth adjustment system characterized by the said control apparatus having the function to give the command which pays out the said weight to the said drum apparatus, and the function to give the command which winds up the said weight. The controller is
A function for setting a target depth at which the floating body is to be arranged;
A function of comparing the current depth of the floating body with the target depth;
A function of a determination process for determining whether it is necessary to maintain the depth of the floating body and to float and sink in order to match the current depth of the floating body with the target depth;
When it is determined by the determination process that flying is necessary, a function of giving a command to feed the weight to the drum device;
The depth adjustment system according to claim 1, further comprising: a function of giving a command to wind the weight to the drum device when it is determined by the determination processing that sedimentation is necessary. The depth adjustment system according to claim 1, wherein the cable body has a function of transmitting water inward and outward.   The depth adjustment system according to any one of claims 1 to 3, wherein the platform is a ship that travels on a water surface or a traveling body that travels underwater. The depth adjustment system according to any one of claims 1 to 3, wherein the platform is a buoy moored in water. When sinking a floating body connected to the other end of a hollow cable body having one end held by the platform, a linear weight that can be inserted into the internal space of the cable body from the drum device provided in the platform To extend the length of the portion where the weight is inserted into the internal space in the longitudinal direction of the cord body,
When the floating body is levitated, a process of reducing the length dimension of the portion where the weight is inserted into the internal space in the longitudinal direction of the cord body is performed by winding the weight around the drum device. Depth adjustment method characterized.

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