FLOAT DEVICE
专利汇可以提供FLOAT DEVICE专利检索，专利查询，专利分析的服务。并且A float device includes a drive motor provided inside a float hull, a plunger reciprocating along with rotation of the drive motor, an internal oil reservoir for housing an hydraulic oil therein, an externally-opened cylinder attached to the float bull, a buoyant force adjustment piston reciprocating in the cylinder along with exit/entry of the hydraulic oil, and a three-way valve having a first connection port connected to the plunger, a second connection port connected to the internal oil reservoir, and a third connection per connected to the cylinder, for switching the flow between the first connection port and the second connection ports and the flow between the first connection port and the third connection port.，下面是FLOAT DEVICE专利的具体信息内容。
What is claimed is:
This application is a Continuation Application of PCT Application No. PCT/JP2010/069089, filed Oct. 27, 2010 and based upon and claiming the benefit of priority from prior Japanese Patent Application No. 2009-246472, filed. Oct. 27, 2009, the entire contents of all of which are incorporated herein by reference.
1. Field of the Invention
The present invention relates to a float device such as ocean observation float device, which is called a “profiling float” used for an ocean monitoring system (which will be called Argo program below), and particularly to a technique capable of reducing the number of parts and adjusting a buoyant force with high accuracy.
2. Description of the Related Art
In order to address the environmental problems such as global warming, it is necessary to reveal environmental variation mechanisms in the global environment and to determine the total amount and the circulation of greenhouse gas. The Argo program is being promoted in order to address the problems. Under the Argo program a cylinder-shaped ocean observation float device having a length of 1 m which is called a “profiling float” is deployed from a ship, then automatically descends up to a depth (about 2000 m) in balance with a preset density of around water, and drifts for several days. When the power supply is turned on by an internal timer, the ocean observation float device comprising a float hull having a certain buoyancy is raised by a buoyant force adjustment mechanism.
The ocean observation float device is ascending while measuring water temperature and salinity. The ocean observation float device floating on the sea surface is powered off after transmitting the observation data from the sea surface via satellites, and is caused to descend by the buoyant force adjustment mechanism. The operation is repeated for several years.
The above buoyant force adjustment mechanism is configured as follows, for example. That is,
In the buoyant force adjustment mechanism 100, when the hydraulic oil is carried from the internal oil reservoir 110 to the external buoyant force adjustment bladder 130, the plunger 120 is moved in the arrow α direction In
On the other hand, when the ocean observation float device descends, the hydraulic oil is returned from the external buoyant force adjustment bladder 130 to the internal of reservoir 110. In this case, the valve 152 is opened so that the hydraulic oil is returned to the internal oil reservoir 110 by a contraction force of the external buoyant force adjustment bladder 130.
The above buoyant force adjustment mechanism has the following problems. That is, three valves are required, and thus the number of parts increases and the float hull can be increased in its size. The buoyant force adjustment mechanism can be controlled by the plunger during the ascent but cannot be controlled by the plunger during the descent, and thus there is a problem that the buoyant force is difficult to be controlled with high accuracy.
It is therefore an object of the present invention to provide a float device capable of reducing the number of parts and controlling a buoyant force with high accuracy during both ascent and descent.
The float device according to the present invention is configured as follows in order to meet the object.
A float device is characterized in that the float device comprises a float hull having a certain buoyancy, a drive motor provided inside the float hull, a plunger reciprocating along with rotation of the drive motor, an internal it reservoir for housing hydraulic oil therein, an externally-opened cylinder attached to the float hull, a buoyant force adjustment piston reciprocating in the cylinder along with exit/entry of the hydraulic oil, and a three-way valve having a first connection port connected to the plunger, a second connection port connected to the internal oil reservoir and a third connection port connected to the cylinder, for switching the flow between the first connection port and the second connection port and the flow between the first connection port and the third connection port.
A float device is characterized in that the float device comprises a float hull having a certain buoyancy, a drive motor provided inside the float hull, a plunger reciprocating along with rotation of the drive motor, an internal oil reservoir for housing an hydraulic oil therein, an externally-opened cylinder attached to the float hull, a buoyant force adjustment piston reciprocating in the cylinder along with exit/entry of the hydraulic oil, a branch pipe connected at the branch point to the plunger, a first two-way valve attached to one side of the branch pipe and connected to the internal oil reservoir, and a second two-way valve attached to the other side of the branch pipe and connected to the cylinder.
The ocean observation float device 10 comprises a float hull 11 formed in a cylinder-like shape. The float hull 11 is provided with a hollow or the like inside or outside, and is set to have a predetermined buoyant force. An electronic part mounting unit 20 mounting an antenna for transmission and reception with external communication devices, and various ocean observation electronic devices thereon is mounted on a top part 12 of the float hull 11. Part of the buoyant force adjustment mechanism 30 is mounted on a bottom part 13 of the float hull 11.
The buoyant force adjustment mechanism 30 comprises a plunger mechanism 40 arranged inside the float hull 11, an internal oil reservoir 50 for storing an hydraulic oil therein, a three-wav valve mechanism 60, a buoyant force adjustment mechanism 70 provided outside the float hull 11, and a control unit 35 for controlling them in an associated manner. An oil pipe 80, an oil pipe 81, and an oil pipe 82 connect between the plunder mechanism 40 and the three-way valve mechanism 60, between the internal of reservoir 50 and the three-way valve mechanism 60, and between the buoyant force adjustment unit 70 and the three-way valve mechanism 60, respectively.
The plunger mechanism 40 comprises a drive motor 41, a deceleration mechanism 42 for transmitting a rotation force of the drive motor 41 while decelerating, a gear unit 43 for transforming the rotation force transmitted by the deceleration mechanism 42 into a reciprocating power, and a plunger 44 reciprocating by the gear unit 43.
The three-way valve mechanism 60 comprises a three-way valve 61, and an operation motor 62 for operating the three-way valve 61. The three-way valve 61 has a first connection port 61a connected to the plunger 44, a second connection port 61b connected to the internal oil reservoir 50, and a third connection port 61c connected to a cylinder 71 described later, and switches the flow between the first connection port 61a and the second connection port 61b and the flow between the first connection port 61a and the third connection port 61c.
The buoyant force adjustment unit 70 comprises an externally-opened cylinder (variable volume body) 71, and a buoyant force adjustment piston 72 reciprocating in the cylinder 71 along with exit/entry of the hydraulic oil.
The plunger mechanism 40 and the three-way valve mechanism 60 are controlled such that an associated operation is performed as follows. That is, the three-way valve 61 is switched to cause the first connection port 61a and the second connection port 61b to permit flow during the movement of the plunger 44 to one side, and the three-way valve 61 is switched to cause the first connection port 61a and the third connection port 61c to permit flow during the movement of the plunger 44 to the other side, thereby carrying the hydraulic oil between the internal oil reservoir 50 and the cylinder 71.
With the thus-configured ocean observation float device 10, a buoyant force is adjusted as follows. That is, the hydraulic oil is carried from the internal oil reservoir 50 to the cylinder 71 during the ascent. At first, the drive motor 41 is operated to move the plunger 44 in the X-direction in
Accordingly, a buoyant force increases and the float hull 11 slightly ascends. The same operations are repeated so that the amount of hydraulic oil inside the cylinder 71 increases and the float hull 11 ascends to a predetermined position.
On the other hand, during the descent, the hydraulic oil is carried from the cylinder 71 to the internal oil reservoir 50. At first, the drive motor 41 is operated to move the plunger 44 in the X-direction in
The same operations are repeated so that the amount of hydraulic oil inside the cylinder 71 decreases and the float hull 11 descends to a predetermined position.
With the ocean observation float device 10 according to the present embodiment, the transport of the hydraulic oil can be controlled only by the three-way valve 61, and thus the number of parts can be reduced and the float hull can be downsized. The float device can be controlled by the plunger 44 during both the ascent and the descent, and thus the buoyant force can be controlled with high accuracy, thereby positioning the float hull 11 at a desired position. Thus, the ocean data can be measured with high accuracy.
The position of the cylinder 71 is measured by an encoder 45 and the position of the plunger 44 is measured by an encoder 46 with high accuracy, and the positions may be input into the control unit 35 to be used as positioning information and buoyant force adjustment information. A potentiometer may be used instead of the encoder 45.
A bellows type bap or the like may be used as a variable volume body instead of the cylinder 71.
A working robot may be attached to the float hull 11 and may be used as an undersea robot.
In the present variant, a two-way valve mechanism 90 is provided instead of the three-way valve mechanism 60. The two-way valve mechanism 90 comprises a branch pipe 91 connected at the branch point to the plunger 44, a first two-way valve 92 attached to one side of the branch pipe 91 and connected to the internal oil reservoir 50, a second two-way valve 93 attached to the other side of the branch pipe 91 and connected to the cylinder 71, and an operation motor 94 for opening and closing the first two-way valve 92 and the second two-way valve 93.
The plunger mechanism 40 and the two-way valve mechanism 90 are controlled to perform an associated operation as follows. That is, the first two-way valve 92 is opened and the second two-way valve 93 is closed during the movement of the plunger 44 to one side and the first two-way valve 92 is closed and the second two-way valve 93 is opened during the movement of the plunger 44 to the other side, thereby transporting the hydraulic oil between the internal it reservoir 50 and the cylinder 71 via the plunger 44.
With the thus-configured buoyant force adjustment mechanism 30A, a buoyant force is adjusted as follows. That is, the hydraulic oil is carried from the internal oil reservoir 50 to the cylinder 71 during the ascent. At first, the drive motor 41 is operated to move the plunger 44 in the X-direction in
Accordingly, a buoyant force increases and the float hull 11 slightly ascends. The same operations are repeated so that the amount of hydraulic oil inside the cylinder 71 increases and the float hull 11 ascends to a predetermined position.
On the other hand, during the descent, the hydraulic oil is carried from the cylinder 71 to the internal oil reservoir 50. At first, the drive motor 41 is operated to move the plunger 44 in the X-direction in
The same operations are repeated so that the amount of hydraulic oil inside the cylinder 71 decreases and the float hull 11 descends to a predetermined position.
Also with the buoyant force adjustment mechanism 30A according to the present variant, a buoyant force can be adjusted similarly to the buoyant force adjustment mechanism 30 and thus similar effects can be obtained.
The present invention is not limited to the embodiment. For example, the ocean observation float device has been described in the above example, but any float devices for adjusting a buoyant force of the float hull may be applied to other use, not limited to measurement. Additionally, the embodiment can be variously modified without departing from the spirit of the present invention.
According to the present invention, it is possible to provide a float device capable of reducing the number of parts and controlling a buoyant force with high accuracy during both ascent and descent.
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