WO2010007914A1 - 水中走行車両 - Google Patents
水中走行車両 Download PDFInfo
- Publication number
- WO2010007914A1 WO2010007914A1 PCT/JP2009/062346 JP2009062346W WO2010007914A1 WO 2010007914 A1 WO2010007914 A1 WO 2010007914A1 JP 2009062346 W JP2009062346 W JP 2009062346W WO 2010007914 A1 WO2010007914 A1 WO 2010007914A1
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- WO
- WIPO (PCT)
- Prior art keywords
- vehicle
- underwater
- vehicle body
- thruster
- traveling
- Prior art date
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63C—LAUNCHING, HAULING-OUT, OR DRY-DOCKING OF VESSELS; LIFE-SAVING IN WATER; EQUIPMENT FOR DWELLING OR WORKING UNDER WATER; MEANS FOR SALVAGING OR SEARCHING FOR UNDERWATER OBJECTS
- B63C11/00—Equipment for dwelling or working underwater; Means for searching for underwater objects
- B63C11/52—Tools specially adapted for working underwater, not otherwise provided for
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
- H02G1/06—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for laying cables, e.g. laying apparatus on vehicle
- H02G1/10—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for laying cables, e.g. laying apparatus on vehicle in or under water
Definitions
- the present invention relates to an underwater traveling vehicle that is used for undersea exploration, undersea cable laying, cleaning of the seabed and tank bottom, and the like, and travels with an endless track means.
- an underwater traveling device provided with a propeller capable of changing the rotation direction on a main body that can be driven by a tire for the purpose of enabling quick and stable ascent without being influenced by the surrounding water pressure even when the water depth is deep.
- Patent Document 1 An underwater traveling device provided with a propeller capable of changing the rotation direction on a main body that can be driven by a tire for the purpose of enabling quick and stable ascent without being influenced by the surrounding water pressure even when the water depth is deep.
- Patent Document 1 the underwater traveling device of Patent Document 1 is intended for a relatively shallow seabed, and it has been difficult to use tires, so that it floats in a stable state and floats at a predetermined position on the water surface. The purpose was to make it happen.
- unmanned spacecraft for deep exploration needs to be light weight to reduce tension on the cable.
- the vehicle is required to have mobility, and therefore it is desirable that the vehicle be in a state close to neutral buoyancy.
- the present invention solves the above-described problems, and an object thereof is to provide an underwater traveling vehicle that is formed with a simple structure and low weight, improves traveling performance, and reduces lifting.
- the underwater vehicle of the present invention includes a vehicle body, endless track means rotatably provided on the vehicle body, drive means provided on the vehicle body for driving the endless track means, and a thruster provided on the vehicle body. , Provided.
- storage means for storing the initial state of the vehicle body on land, measurement means for measuring the state of the vehicle body in water, thrust or propulsion of the thruster with respect to outputs from the storage means and the measurement means And a control means for controlling the direction.
- the storage means stores a weight, an initial gravity center position, and an initial buoyancy position of the underwater vehicle.
- the measuring means measures the position of the center of gravity and the floating position of the underwater traveling vehicle in water.
- control means includes a determination means for determining whether the vehicle body is stable or unstable with respect to outputs of the storage means and the measurement means.
- the storage means stores a threshold value that defines a boundary between a stable region and an unstable region based on a relationship between a center of gravity position and a buoyancy position for each weight of the underwater traveling vehicle, and the determination means includes the underwater traveling vehicle.
- the position of the center of gravity and the buoyancy position in water are compared with the threshold value to determine whether the vehicle body is stable or unstable.
- control means operates continuously while the underwater vehicle is traveling.
- An underwater vehicle of the present invention includes a vehicle body, endless track means rotatably provided on the vehicle body, drive means provided on the vehicle body for driving the endless track means, and a thruster provided on the vehicle body. Since it is equipped, the thruster is activated, the weight is applied to the underwater vehicle and the apparent weight and the center of gravity position of the underwater vehicle are changed. , Driving performance can be improved.
- storage means for storing the initial state of the vehicle body on land
- measurement means for measuring the state of the vehicle body in water
- thrust or propulsion of the thruster with respect to outputs from the storage means and the measurement means
- a control means for controlling the direction, the lift can be further reduced and the running performance can be improved.
- the storage means stores the weight of the underwater vehicle, the initial center of gravity position, and the initial buoyancy position, the initial state can be accurately applied during control.
- the measuring means measures the position of the center of gravity and the buoyancy position of the underwater traveling vehicle in water, the accuracy during control can be improved.
- control means has a determination means for determining whether the vehicle body is stable or unstable with respect to the outputs of the storage means and the measurement means, it is possible to grasp the state of the vehicle body in water.
- the storage means stores a threshold value that defines a boundary between a stable region and an unstable region based on a relationship between a center of gravity position and a buoyancy position for each weight of the underwater traveling vehicle, and the determination means includes the underwater traveling vehicle.
- the position of the center of gravity and the buoyancy position in water are compared with the threshold value to determine whether the vehicle body is stable or unstable, so that the state of the vehicle body in water can be quickly grasped.
- FIG. 1 shows a schematic diagram of an underwater vehicle according to this embodiment.
- 1 is an underwater vehicle
- 2 is a vehicle body
- 3 is a crawler as endless track means
- 4 is a thruster
- 5 is an attitude sensor as measurement means
- 6 is a camera
- 7 is a light
- 8 is a buoyant body
- 9 Is the cable
- the underwater vehicle 1 is formed so that the crawler 3 can be rotated below both sides of the vehicle body 2 and the seabed can be moved by driving the crawler 3 by driving means such as a motor (not shown).
- the thruster 4 is provided in the vehicle body 2 and is used to change the position of the center of gravity or the floating position of the underwater traveling vehicle 1.
- a first thruster 4a and a second thruster 4b are provided.
- the first thruster 4a is arranged in the vertical direction as the first direction
- the second thruster 4b is arranged in the horizontal direction as the second direction.
- a propulsion direction can be defined by adjusting each thrust of the 1st thruster 4a and the 2nd thruster 4b.
- the thruster 4 can be rotated with respect to the vehicle body 2 and the propulsion direction can be changed by changing the angle. Further, it is more preferable that the thruster 4 is formed to be movable with respect to the vehicle body 2.
- the attitude sensor 5 measures the state of the vehicle body 2 such as the tilt angle and acceleration underwater.
- the state of the operation member such as the tilt angle and acceleration underwater.
- the camera 6 is for detecting the surrounding state of the underwater vehicle 1. In the case of submarine exploration, submarine cable laying or cleaning of the sea floor or tank bottom, the surroundings are photographed and a signal is transmitted to an operator on the sea.
- the light 7 has a role of illuminating a shooting location of the camera 6.
- the buoyancy body 8 can be expanded and contracted and can adjust the buoyancy of the underwater vehicle 1 and is mainly used when collecting on the water.
- the cable 9 connects the sea and the underwater vehicle 1 and sends electric power and various signals.
- FIG. 2 shows a block diagram of the underwater vehicle 1.
- the attitude sensor 5 and the camera 6 are for measuring the state of the vehicle body 2 in water. In particular, what measures the center-of-gravity position and buoyancy position of the underwater vehicle 1 in water is preferable.
- the storage means 10 stores the initial state of the vehicle body on land. In particular, it is preferable to store the weight F1, the initial center of gravity position, and the initial buoyancy position of the underwater vehicle.
- the control means 11 controls the thrust or propulsion direction of the thruster 4 with respect to outputs from the storage means 10, the attitude sensor 5, the camera 6, and the like.
- the control unit 11 includes a determination unit 12 that determines whether the vehicle body 2 is stable or unstable with respect to outputs from the storage unit 10, the attitude sensor 5, the camera 6, and the like.
- the storage means 10 has thresholds A, B, C that define the boundary between the stable region and the unstable region from the relationship between the center of gravity position and the buoyant position for each weight F1 of the underwater vehicle 1 as shown in FIG.
- the determination means 12 can determine whether the vehicle body is stable or unstable by comparing the center of gravity position and buoyancy position of the underwater traveling vehicle 1 with the threshold values A, B, and C. preferable.
- three threshold values are used.
- the threshold values are not limited to three, and the number of threshold values can be arbitrarily set according to the rotation speed and the rotation direction of the thruster gear.
- the solid line in FIG. 3 indicates the threshold value A when the weight F1 of the underwater traveling vehicle 1 is 300 kgf (underwater weight 100 kgf).
- the dotted line in FIG. 3 indicates the threshold value B when the weight F1 of the underwater traveling vehicle 1 is 350 kgf (underwater weight 150 kgf)
- the alternate long and short dash line in FIG. 3 indicates that the weight F1 of the underwater traveling vehicle 1 is 250 kgf (underwater weight 50 kgf).
- the threshold value C is shown.
- a case where the point corresponding to the relationship between the position of the center of gravity on the horizontal axis and the position of the vertical axis on the vertical axis is on the left side of each of the threshold values A, B, and C is defined as a stable region.
- An unstable region is defined as a case where the point corresponding to the relationship between the position of the center of gravity on the horizontal axis and the position of the vertical axis on the vertical axis is on the left side of each of the threshold values A, B, and C.
- FIG. 4 shows a control flowchart of the underwater vehicle 1.
- step 1 the initial weight, the initial center of gravity, and the initial buoyancy are stored in the storage means 10 before working in water (ST1).
- step 2 the gravity center position and the floating position of the underwater traveling vehicle 1 stored in the storage means 10, and the stable region for each weight F1 of the underwater traveling vehicle 1 stored in the storage means 10 as shown in FIG.
- the determination means 12 determines whether or not the vehicle body is unstable by comparing the threshold value based on the stable running / posture correction determination chart that defines the boundary of the unstable region (ST2).
- step 3 If it is determined in step 2 that the vehicle body is unstable, the thruster 4 is controlled in step 3 (ST3).
- the thruster 4 is controlled in its propulsion direction by the control means 11 based on thrust, thruster angle, thruster position, and the like. Subsequently, in step 4, the crawler 3 is driven to cause the underwater traveling vehicle 1 to travel (ST4).
- step 2 If it is determined in step 2 that the vehicle body is not unstable and stable, the crawler 3 is driven in step 4 to cause the underwater vehicle 1 to travel (ST4).
- step 5 the underwater state of the underwater traveling vehicle 1 is measured and observed by the attitude sensor 5, and for example, a fluid resistance F5 generated by running the underwater traveling vehicle 1 or a manipulator is attached. Whether or not the center of gravity position and the buoyancy position are changed and the vehicle is running stably is determined by the determination means 12 based on the resistance of the product (ST5).
- step 6 the peripheral state of the underwater vehicle 1 is measured by the attitude sensor 5 or the like ( ST6), return to step 2.
- step 5 If it is determined in step 5 that the underwater vehicle 1 is traveling stably, the control means 11 continues to operate while the underwater vehicle 1 is traveling, continuously performing observation, obtaining various data, Continue control.
- FIG. 5 is a diagram illustrating the operation of the underwater vehicle 1.
- FIG. 6 shows the force acting on the underwater vehicle 1, the weight F1, the buoyancy F2, the vertical drag F3, the thrust F4, the fluid resistance F5, and its action point.
- the coordinates representing the position of the action point are the origin at the upper end in the forward traveling direction of the underwater traveling vehicle 1, the X direction on the opposite side of the traveling direction, and the Z direction below.
- Table 1 below shows the main specifications of the underwater vehicle 1 used in the experiment.
- Table 1 Item Characteristics 600mm (length) Dimension 717mm (full width including crawler) 540mm (from the bottom of the crawler to the top of the cover) 48W motor with thruster encoder Initial position can be changed Crawler 48W motor with encoder Weight 34.0kgf (333.2N) Buoyancy 17.9kgf (175.4N)
- the thruster thrust is measured according to the input voltage and the motor rotation speed, and is 9.0 N at the rated voltage.
- the underwater vehicle 1 travels in the water tank.
- the dimensions of the aquarium are 40 m long, 4 m wide, and 2 m deep.
- the operation of the underwater vehicle 1 in the water tank can be observed from above and from the observation window on the side wall.
- position of the underwater vehicle 1 is obtained from the mounted gyro.
- the experiment was performed by changing the buoyancy F3 by changing the number of block members that give the buoyancy F3.
- FIG. 7 is a graph showing the resistance F5 by water obtained by the towing test and the position Z R of the action point in the Z direction of the resistance F5.
- the resistance F5 by water and the position Z R of the action point of the resistance F5 are parameters of stable running characteristics. As shown in FIG. 7, when the towing speed corresponding to the traveling speed increases, the resistance F5 due to the fluid increases in proportion to the square of the approximate speed. For this reason, the underwater vehicle 1 tends to float on the side opposite to the direction in which it is pulled. On the other hand, the position Z R of the action point becomes constant when the speed increases to some extent.
- Table 2 shown below shows the driving operation when the underwater vehicle 1 is driven with various specifications.
- the underwater vehicle 1 was driven forward at a motor speed of 3000 rpm corresponding to a running speed of about 0.3 m / s. In such low speed and low speed experiments, it is expected to reduce the dynamic effects observed at the start.
- the underwater traveling vehicle 1 when the buoyancy F3 is lower than a predetermined value, the underwater traveling vehicle 1 can maintain a horizontal posture and can travel stably.
- FIG. 8 is a graph in which the traveling state of the underwater traveling vehicle in cases 2, 4 and 5 of this experiment in which the underwater traveling vehicle 1 travels stably is discriminated.
- the horizontal axis of the graph represents the barycentric position X G in the x direction, and the vertical axis represents the floating center position X B in the x direction.
- having the thruster 4 is substantially equivalent to increasing the weight F1, and the center of gravity (X G , Z G ) can be changed. As a result, the underwater vehicle 1 can maintain a horizontal posture and travel stably.
- FIG. 9 is a graph in which the traveling state of the underwater traveling vehicle 1 with and without the thruster 4 in the case 6 is discriminated. As shown in FIG. 8, when the thruster 4 is not present in the case 6, the traveling state of the underwater traveling vehicle 1 is in an unstable region, but when the thruster 4 is present, the traveling state of the underwater traveling vehicle 1 is In the stable region.
- FIG. 10 is a graph that discriminates the traveling state of the underwater traveling vehicle 1 with and without the thruster 4 in the case 7.
- the traveling state of the underwater vehicle 1 in the case 7, is in a stable region both when the thruster 4 is originally provided and when the thruster 4 is not present.
- Table 2 when the thruster 4 is not present, one of the traveling states of the underwater traveling vehicle 1 is lifted and unstable.
- the reason for the rise is thought to be the effect of the measurement accuracy of the buoyancy center and the center of gravity.
- FIG. 10 when the thruster 4 is provided, it is in a more stable region as compared to the case without the thruster 4, and having the thruster 4 changes the center of gravity and leads to stable traveling. Therefore, there is no substitute for a more effective method.
- Table 3 shown below shows the running operation when the underwater vehicle 1 is run with the same specifications as in Table 2.
- the underwater vehicle 1 of the present embodiment is provided in the vehicle body 2, the crawler 3 that is rotatably provided on the vehicle body 2, the driving means that is provided in the vehicle body 2 and drives the crawler 3, and the vehicle body 2. Therefore, by changing the position of the center of gravity of the underwater traveling vehicle 1 with the thruster 4, it is possible to form a low weight with a simple structure, to reduce the lift, and to improve the traveling performance. it can.
- the storage means 10 for storing the initial state of the vehicle body 2 on land, the attitude sensor 5 for measuring the state of the vehicle body 2 in water, and the thrust of the thruster 2 with respect to the outputs from the storage means 10 and the attitude sensor 5 Alternatively, since the control means 11 for controlling the propulsion direction is provided, the lift can be further reduced and the running performance can be improved.
- the storage means 10 stores the weight of the underwater vehicle 1, the initial center of gravity position, and the initial buoyancy position, the initial state can be accurately applied during control.
- attitude sensor 5 measures the position of the center of gravity and the buoyancy position of the underwater traveling vehicle 1 in water, the accuracy during control can be improved.
- control unit 11 includes the determination unit 12 that determines whether the vehicle body 2 is stable or unstable with respect to the outputs of the storage unit 10 and the attitude sensor 5, it is possible to grasp the state of the vehicle body 2 in water. it can.
- the storage means 10 stores, for each weight of the underwater traveling vehicle 1, a threshold value that defines the boundary between the stable region and the unstable region based on the relationship between the center of gravity position and the buoyancy position. Since the center of gravity position and the buoyancy position in water are compared with the threshold value to determine whether the vehicle body 2 is stable or unstable, the situation of the vehicle body 2 in water can be quickly grasped.
- control means since the control means continues to operate while the underwater vehicle is traveling, it can quickly grasp the state of the vehicle body 2 underwater and control it even if it becomes unstable after it has been stable. can do.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Control Of Position, Course, Altitude, Or Attitude Of Moving Bodies (AREA)
Abstract
Description
項目 特性
600mm(長さ)
寸法 717mm(クローラを含む全幅)
540mm(クローラの下端からカバーの上端まで)
スラスタ エンコーダ付き48Wモータ
初期位置は変更可能
クローラ エンコーダ付き48Wモータ
重量 34.0kgf(333.2N)
浮力 17.9kgf(175.4N)
ケース 重量 浮力 重心 浮力中心 動作(スラスタ無) 動作(スラスタ有)
(kgf) (kgf) (mm) (mm)
1 34.5 18.6 285.6 308.3 安定 -
2 34.5 20.6 285.6 280.1 安定 -
3 34.5 22.6 285.6 306.8 安定 -
4 34.5 24.6 285.6 283.3 安定 -
5 34.5 26.6 285.6 305.3 安定 -
6 34.5 28.6 285.6 285.1 浮き上がり 安定
7 34.5 30.6 285.6 305.9 浮き上がり 安定
ケース 重量 浮力 重心 浮力中心 動作(スラスタ無) 動作(スラスタ有)
(kgf) (kgf) (mm) (mm)
1 34.5 18.6 285.6 308.3 安定 -
2 34.5 20.6 285.6 280.1 浮き上がり 安定
3 34.5 22.6 285.6 306.8 浮き上がり 安定
4 34.5 24.6 285.6 283.3 浮き上がり 浮き上がり
5 34.5 26.6 285.6 305.3 浮き上がり 安定
6 34.5 28.6 285.6 285.1 浮き上がり 浮き上がり
7 34.5 30.7 285.6 305.9 浮き上がり 安定
Claims (7)
- 車体と、
前記車体に回転可能に設けられる無限軌道手段と、
前記車体に設けられ前記無限軌道手段を駆動させる駆動手段と、
前記車体に設けられたスラスタと、
を備えたことを特徴とする水中走行車両。 - 前記車体の陸上での初期状態を記憶する記憶手段と、
前記車体の水中での状態を計測する計測手段と、
前記記憶手段及び前記計測手段からの出力に対して前記スラスタの推力又は推進方向を制御する制御手段と、
を備えたことを特徴とする請求項1に記載の水中走行車両。 - 前記記憶手段は、前記水中走行車両の重量、初期重心位置及び初期浮心位置を記憶する
ことを特徴とする請求項2に記載の水中走行車両。 - 前記計測手段は、前記水中走行車両の水中での重心位置及び浮心位置を計測する
ことを特徴とする請求項2又は請求項3に記載の水中走行車両。 - 前記制御手段は、前記記憶手段と前記計測手段の出力に対して、前記車体が安定か不安定かを判断する判別手段を有する
ことを特徴とする請求項2乃至請求項4のいずれか1つに記載の水中走行車両。 - 前記記憶手段は、前記水中走行車両の重量ごとに、重心位置と浮心位置の関係から安定領域と不安定領域の境界を定めた閾値を記憶し、
前記判別手段は、前記水中走行車両の水中での重心位置及び浮心位置と、前記閾値とを比較して前記車体が安定か不安定かを判断する
ことを特徴とする請求項5に記載の水中走行車両。 - 前記制御手段は、前記水中走行車両の走行中、継続して作動する
ことを特徴とする請求項1乃至請求項6のいずれか1つに記載の水中走行車両。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/003,686 US8511247B2 (en) | 2008-07-17 | 2009-07-07 | Underwater traveling vehicle |
EP09797840.7A EP2301838B1 (en) | 2008-07-17 | 2009-07-07 | Underwater traveling vehicle |
JP2010520831A JP5371985B2 (ja) | 2008-07-17 | 2009-07-07 | 水中走行車両 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2008-186046 | 2008-07-17 | ||
JP2008186046 | 2008-07-17 |
Publications (1)
Publication Number | Publication Date |
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WO2010007914A1 true WO2010007914A1 (ja) | 2010-01-21 |
Family
ID=41550320
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2009/062346 WO2010007914A1 (ja) | 2008-07-17 | 2009-07-07 | 水中走行車両 |
Country Status (4)
Country | Link |
---|---|
US (1) | US8511247B2 (ja) |
EP (1) | EP2301838B1 (ja) |
JP (1) | JP5371985B2 (ja) |
WO (1) | WO2010007914A1 (ja) |
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JP2016043848A (ja) * | 2014-08-25 | 2016-04-04 | 学校法人金沢工業大学 | 探査装置 |
JP2019533599A (ja) * | 2016-09-20 | 2019-11-21 | サウジ アラビアン オイル カンパニー | 水中艇及び検査方法 |
CN113525633A (zh) * | 2021-07-22 | 2021-10-22 | 南通理工学院 | 一种大范围巡航自主水下机器人结构及使用方法 |
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CN109878667B (zh) * | 2019-04-04 | 2019-11-08 | 南京涵铭置智能科技有限公司 | 一种水下观察用机器人及其观察方法 |
CN110588917A (zh) * | 2019-10-25 | 2019-12-20 | 金龙 | 水下船底清理装置 |
CN113431986B (zh) * | 2021-06-24 | 2022-06-17 | 浙江科技学院 | 一种水下管道智能巡检机器人 |
CN115027649A (zh) * | 2022-08-10 | 2022-09-09 | 青岛澳西智能科技有限公司 | 一种水下桥墩检测机器人 |
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- 2009-07-07 JP JP2010520831A patent/JP5371985B2/ja not_active Expired - Fee Related
- 2009-07-07 WO PCT/JP2009/062346 patent/WO2010007914A1/ja active Application Filing
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JP2014518801A (ja) * | 2011-04-22 | 2014-08-07 | ウエスチングハウス・エレクトリック・カンパニー・エルエルシー | 水中ロボット式ベント及び検査システム |
JP2016043848A (ja) * | 2014-08-25 | 2016-04-04 | 学校法人金沢工業大学 | 探査装置 |
JP2019533599A (ja) * | 2016-09-20 | 2019-11-21 | サウジ アラビアン オイル カンパニー | 水中艇及び検査方法 |
CN113525633A (zh) * | 2021-07-22 | 2021-10-22 | 南通理工学院 | 一种大范围巡航自主水下机器人结构及使用方法 |
CN113525633B (zh) * | 2021-07-22 | 2022-04-01 | 南通理工学院 | 一种大范围巡航自主水下机器人结构及使用方法 |
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US8511247B2 (en) | 2013-08-20 |
JP5371985B2 (ja) | 2013-12-18 |
JPWO2010007914A1 (ja) | 2012-01-05 |
EP2301838A1 (en) | 2011-03-30 |
EP2301838A4 (en) | 2013-04-03 |
US20110107955A1 (en) | 2011-05-12 |
EP2301838B1 (en) | 2017-03-22 |
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