EP2620358B1 - Remotely operated submersible vehicle - Google Patents
Remotely operated submersible vehicle Download PDFInfo
- Publication number
- EP2620358B1 EP2620358B1 EP20120153107 EP12153107A EP2620358B1 EP 2620358 B1 EP2620358 B1 EP 2620358B1 EP 20120153107 EP20120153107 EP 20120153107 EP 12153107 A EP12153107 A EP 12153107A EP 2620358 B1 EP2620358 B1 EP 2620358B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- mount
- camera
- propeller
- shaft
- center
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Not-in-force
Links
- 238000007789 sealing Methods 0.000 claims description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 20
- 230000005484 gravity Effects 0.000 claims description 17
- 230000004888 barrier function Effects 0.000 claims description 14
- 230000007246 mechanism Effects 0.000 claims description 8
- 230000008878 coupling Effects 0.000 claims description 7
- 238000010168 coupling process Methods 0.000 claims description 7
- 238000005859 coupling reaction Methods 0.000 claims description 7
- 230000003068 static effect Effects 0.000 claims description 5
- 239000011521 glass Substances 0.000 claims description 4
- 101100011369 Caenorhabditis elegans egl-26 gene Proteins 0.000 description 10
- 230000008901 benefit Effects 0.000 description 3
- 239000003643 water by type Substances 0.000 description 2
- 235000014653 Carica parviflora Nutrition 0.000 description 1
- 241000243321 Cnidaria Species 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000013505 freshwater Substances 0.000 description 1
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- 239000004519 grease Substances 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63G—OFFENSIVE OR DEFENSIVE ARRANGEMENTS ON VESSELS; MINE-LAYING; MINE-SWEEPING; SUBMARINES; AIRCRAFT CARRIERS
- B63G8/00—Underwater vessels, e.g. submarines; Equipment specially adapted therefor
- B63G8/001—Underwater vessels adapted for special purposes, e.g. unmanned underwater vessels; Equipment specially adapted therefor, e.g. docking stations
-
- 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
- B63C11/48—Means for searching for underwater objects
Definitions
- the present invention relates generally to a mechanism for adjusting the pitch of a subsea vehicle, and more particularly, a mechanism that is contained entirely within the body of the vehicle, such as known from WO8900527 .
- the present invention improves over the prior art by employing the use of as few as two thrusters and an internal mechanism used to control the pitch from within the shell of the submersible.
- No ballast system, rudder system, or additional thrusters are required, saving complexity and money while improving reliability.
- Output shafts through rotary seals or magnetic couplers are minimized to as few as the two essential thrusters, minimizing leak points.
- the submersible takes on a circular profile while looking at it from the side.
- a shaft crosses the submersible at the center on the pitch axis that is fixed to the external shell holding the thrusters. From this shaft the framework of the submersible hangs with all of the essential components and any additional weight required gaining the desired buoyancy.
- a motor such as a servo motor is mounted to the framework and is coupled to a gear, sprocket or pulley that is fixed on the center shaft. When activated the motor rotates the shell of the submersible along with the thrusters to the desired pitch while the internal frame remains low.
- This system allows the use of conventional low cost components to adjust pitch while remaining safely inside the confines of the submersible.
- the center of gravity for the submersible does not need to coincide at the same point as the center of buoyancy. However, as with any other submersible, the center of gravity needs to be beneath the center of buoyancy in order to take advantage of equilibrium and the natural righting moment used to remain stable.
- An additional advantage to this configuration allows a camera and floodlight to be mounted to the center shaft and rotate independently of the body around a center ring window. If the internal frame allows for it, the camera could potentially have an unobstructed 360 degree field of view around the pitch axis.
- the present invention is a submersible body that possesses the ability to remain stable while pitching.
- surge, sway and heave represent translation along the three axes of a vessel, while roll, pitch and yaw represent angular rotation about those axes.
- Pitch and heave is the freedom of a submersible to move in the vertical plane that differentiates it from a surface ship. It will be this motion and more specifically, the use of pitch, to move vertically in the present invention.
- Stability is the property of a body that causes it to develop forces, which work to return it to the original position when disturbed from a condition of equilibrium. When the resultant forces and moments acting on an underwater vehicle are zero, it is said to be in a state of equilibrium.
- the two natural factors that determine the stability of a submerged vehicle is the positional relationship between the center of buoyancy and the center of gravity, along with the magnitude of the effective mass.
- the center of buoyancy (COB) is the geometric center of volume of the displaced water.
- the center of gravity (COG) is the effective center of mass of the submersible. In order to become neutrally buoyant, the submersible must have a mass equal to that of the water it is displacing.
- the submersible COG 4 In order to gain stability, the submersible COG 4 must be as far away from the COB 3 as possible. As shown in FIG. 2 , FIG. 3 , and FIG. 4 , in the case of the present invention as well as the vast majority of submersibles, the submersible COG 4 is located in the lower portion of the vehicle. With any distance between these two points, the submersible will naturally move towards equilibrium, which places the submersible COG 4 directly underneath the COB 3 due to the forces of gravity. It is this natural righting moment that gives the submersible its stability. Illustrated in FIG. 5 , the magnitude of the righting moment is determined by the mass of the submersible located at the submersible COG 4 multiplied by its distance, M, from an axis drawn through the COB 3 in the direction gravity is acting.
- the present invention comprises of two main structures including an external body 1 and an internal body 2.
- the external body 1 comprises of a charge port 11, a control tether port 12, shell bodies 13, thrusters 14, a viewing window 15, a tether support 16, window sealing o-rings 17, and a center shaft 22.
- the shell bodies 13 and the viewing window 15 together define the structure of the overall external body 1.
- the shell bodies 13 have circular profiles and comprise of a thruster mount 131, a propeller guarding collar 132, propeller guards 133, and sealing fastener ports 134.
- the frontal profile of the submersible should be symmetrical across the XY plane to balance the drag on the frontal area of the submersible.
- the viewing window 15 is a transparent tube of the same size and radius as the circular profile of the shell bodies 13.
- the center shaft 22 is connected to the center of the circular profiles between the shell bodies 13. This design allows the submersible to maintain stability and control.
- the shell bodies 13 are connected to both sides of the viewing window 15.
- the window sealing orings 17 are o-rings that are placed between the viewing window 15 and the shell bodies 13 to seal the connection. The window sealing o-rings 17 ensure that the space within the external body 1 remains water tight.
- sealing fasteners 502 are inserted to secure the corresponding shell bodies 13 together at the sealing fastener ports 134.
- the submersible will include four sealing fasteners 502 to tighten and hold the bodies together.
- the submersible may be smaller and will have a single sealing fastener inserted through the pitching axis of the submersible for securing the bodies together. The location of the sealing fastener 502 on the pitching axis will not obstruct the view of the video camera 30.
- the external body 1 is used primarily to hold out water and to mount the thrusters 14.
- the viewing window 15, being a tube, will have shell bodies 13 on the right side and the left side.
- the control tether port 12 is positioned adjacent to the propeller guarding collar 132 and the viewing window 15 on the right shell body.
- the charge port 11 is positioned adjacent to the propeller guarding collar 132 and the viewing window 15 on the left shell body.
- the charge port 11 and the control tether port 12 are positioned opposite of each other over the viewing window 15.
- Between the charge port 11 and the control tether port 12 is connected the tether support 16.
- the tether support 16 is fastened to the right and left shell bodies 13 by the tether support fasteners 501.
- the charge port 11 is for connecting to a smart charger 6 to charge the submersible's batteries.
- the control tether port 12 is used for connection to a game pad controller by a long control tether. The game pad controller allows the user to control the submersible remotely.
- the internal body 2 consists of all the necessary components to make up the mechanisms for operating the submersible including an internal frame 21, a pitch servo motor 23, a pitch shaft train 24, a camera servo motor 25, a camera train 26, a camera arm 27, a camera shaft mount 28, a flood light 29, a video camera 30, a camera arm mount 31, a control circuit 32, battery packs 33, and weight sets 34.
- the internal frame 21 is the supporting structure of the internal body 2 that holds all of the internal body 2 components together. Additionally, the internal frame 21 is shaped to have mechanical stops 216 to ensure that the external body 1 does not pivot too far and damage the pitch train system.
- the internal frame 21 comprises of a circuit board mount 211, a camera servo mount 212, a pitch servo mount 213, a battery mount 214, and a shaft frame mount 215.
- the internal body 2 hangs downwardly from and is able to pivot about the center shaft 22 at the shaft frame mount 215.
- the pitch servo motor 23 is fastened onto the pitch servo mount 213 by the pitch servo fasteners 504.
- the pitch servo motor 23 allows the user to control the pitching of the submersible.
- the pitch servo motor 23 is connected to the center shaft 22 by the pitch shaft train 24.
- the pitch shaft train 24 is able to transfer rotational forces directly to the center shaft 22.
- the pitch shaft train 24 can be, but is not limited to, a gear set, a belt and pulley system, a chain and sprocket system, or any other suitable systems.
- the activation of the pitch servo motor 23 causes the angle of the external body 1 to change in relation to the internal body 2. This allows the external body 1 to rotate while the internal body 2 remains stationary in the bottom of the circular profile.
- the thrust from the thrusters 14 is now utilized to not only gain movement in the surge direction but also the heave direction.
- the unique configuration of the internal body 2 in relation to the external body 1 along with the circular and symmetrical shape allows the COB 3 and submersible COG 4 to remain in the same position.
- the internal body 2 will not rotate around the center shaft 22 while the external body 1 holds its position with the submersible COG 4 of the internal frame 21 off set from the COB 3. This causes the submersible to leave the state of equilibrium.
- the pitching mechanism works entirely within the confines of the external body 1 to force the external body 1 and the propulsion system to pitch to any desired angle.
- the range of the pitch angle for the submersible could be from a few degrees to a full 360 degrees or even continual pitching.
- the submersible can be pitched at any angle while maintaining a constant COB 3 and submersible COG 4 for stability.
- the submersible can also be fitted with the control tether 7 by connection to the control tether port 12 and held by the tether support 16, as shown in FIG. 13 .
- the optimum positioning of the tether support 16 would be the rear of the external body 1 parallel with the thrusters 14 to prevent drag.
- the tether support 16 is also on the same XY plane as the thruster 14 such that no moment is incurred on the submersible when thrusting. This way the control tether 7 will not inflict any moment on the submersible when in motion and will simply trail behind.
- the present invention utilizes the video camera 30 and the flood light 29 to help the user to navigate the submersible underwater.
- the video camera 30 and the flood light 29 are mounted onto the camera arm mount 31.
- the camera arm mount 31 is extended out from the center shaft 22 by the camera arm 27.
- the camera arm 27 is mounted to and is able to pivot about the center shaft 22 by the camera shaft mount 28.
- the user is able to control the viewing direction of the video camera 30 and flood light 29 independently from the angle of pitch by the camera servo motor 25.
- the camera servo motor 25 is fastened onto the camera servo mount 212 by camera servo fasteners 505.
- the camera servo motor 25 is connected to the camera shaft mount 28 by means of the camera train 26 in a pivoting manner, similar to the pitch shaft train 24 to the center shaft 22.
- the camera train 26 allows rotational forces to be transferred to the camera shaft mount 28 for the independent pivoting of the video camera 30 and the flood light 29 about the center shaft 22.
- This video camera 30 and flood light 29 mechanism allows the user more freedom in observing the submersible's surroundings.
- the video camera 30 also serves to allow the users to see objects ahead for navigation and control of the submersible.
- the flood light 29 serves to illuminate the path that the submersible is taking and the areas the video camera 30 is displaying to the user.
- the submersible makes use of the battery pack 33 to power the video camera 30, the flood light 29, the thrusters 14, the pitch servo motor 23, and the camera servo motor 25.
- the battery pack 33 is positioned on and secured to the battery mount 214 of the internal frame 21. To ensure that the center of gravity for the internal body 2 is centered, the internal frame 21 will have a battery mount 214 on the left and right side. By mounting battery packs 33 on both the left and right side, there is no unutilized space within the external body 1. Attached with the battery pack 33 are the weight sets 34.
- the weight sets 34 serve to add additional mass to the submersible to ensure that the mass of the submersible is equal to the mass of the volume of water the submersible is displacing. This ensures that the submersible possesses neutral buoyancy so the submersible will not need to continually work against vertical forces to hold a depth.
- all of the components of the submersible including the thrusters 14, the pitch servo motor 23, the camera servo motor 25, the video camera 30, and the flood light 29 are connected and controlled by the control circuit 32.
- These components are similarly powered by means of the control circuit 32 as the battery pack 33 is connected and acts as a power source for the control circuit 32.
- the control circuit 32 is able to control all of the electronics of the submersible, the commands and signals are relayed to the control circuit 32 by the control tether port 12.
- the operator makes use of a game pad controller to relay commands and signals to the control circuit 32 through the control tether 7.
- the charge port 11 is connected to the control circuit 32 to allow for connection of a smart charger 6 to charge the battery packs 33 when the submersible is not in use.
- the control circuit 32 is fastened onto the circuit board mount 211 on the internal frame 21 by circuit board fasteners 506.
- the present invention makes use of two independently controlled thrusters 14 for propulsion.
- the thrusters 14 comprise of a magnetic couple 141, a propeller 142, a driving motor 143, and a shaft coupling cover 144.
- the thrusters 14 are located at the sides of the shell bodies 13 on the XY plane parallel with the roll axis of the submersible.
- the thrusters 14 are inserted and secured onto the thruster mount 131.
- the thruster mount 131 is a protruding cup-like structure that is protruding laterally from the shell bodies 13.
- the thruster mount 131 is arranged horizontally and centered, having the opening face the rear of the submersible.
- the driving motor 143 is the portion of the thrusters 14 that will be inserted and sealed within the thruster mount 131.
- the hole leading into the interior space allows the driving motor 143 to be connected to the control circuit 32 for powering and control.
- the presence of this hole requires the connection of the thrusters 14 into the thruster mount 131 to be sealed water tight.
- the thruster utilizes the magnetic couple 141 for propulsion of the propeller 142.
- the magnetic couple 141 comprises of a driver 141a, a follower 141b, a barrier 141c, and a thruster sealing o-ring 141d.
- the driver 141a is connected directly to the driving motor 143 and protrudes out of the thruster mount 131 in a conical shaped manner.
- the barrier 141c is fastened to the thruster mount 131 by thruster fasteners 503.
- the barrier 141c will completely cover and seal the driving motor 143 and the driver 141a within the thruster mount 131.
- the thruster sealing o-ring 141d is positioned between the barrier 141c and the thruster mount 131.
- the barrier 141c similar to the drive possesses a protruding conical shape.
- the follower 141b envelopes the barrier 141c and is able to pivot about the barrier 141c.
- the driver 141a and the follower 141b are able to couple by magnetic force through the barrier 141c. While the driving motor 143 is physically rotating the driver 141a, the follower 141b is able to rotate along with the driver 141a without the need of physical connection by means of magnetic force.
- the propeller 142 is able to protrude and extend out from the thruster 14 by means of a propeller shaft 142a.
- the follower 141b comprises of a propeller water bearing housing 141b.1 and a static o-ring seal 141b.2.
- the propeller shaft 142a is secured onto the propeller water bearing housing 141b.1 and extends the propeller 142 towards the rear of the submersible.
- the propeller water bearing housing 141b.1 is an oil compensated underwater bearing, that further comprises of two small ball bearings, a oil/grease chamber, and is sealed from the water by a rotary shaft seal and the static o-ring seal 141b.2. This allows the propeller 142 to spin freely with little drag.
- the propeller 142 is enveloped and protected by the propeller guarding collar 132.
- the propeller guarding collar 132 is a laterally protruding tubular structure positioned towards the rear of the shell bodies 13 to prevent the propeller 142 from impacting any hard surfaces such as rocks or coral under water.
- the static o-ring seal 141b.2 is positioned within and between the propeller water bearing housing 141b.1 and the propeller shaft 142a.
- the shaft and the follower 141b are covered and secured onto the thruster 14 by the shaft coupling cover 144.
- the shaft coupling cover 144 is a funnel type structure that envelops the propeller shaft 142a and the follower 141b.
- the propeller 142 is enclosed within the propeller guarding collar 132 by the propeller guards 133.
- the propeller guards 133 are ribbed structures that prevent anything from getting caught in the rotating propeller 142 while still allowing the propeller 142 to catch water for propulsion.
- the present invention is a submersible vehicle with a circular profile that is able to achieve stability with its design.
- the present invention makes use of the configuration of the external body 1 and the internal body 2 to control the submersible COG 4 and the COB 3.
- the first COG 18 of the external body 1 closely coincides with the COB 3.
- the external body 1 is unstable and will be unable to maintain a steady level of control.
- the advantage of this configuration is that external forces can work to reposition the external body 1 without a righting moment working against it.
- the second COG 35 of the internal body 2 is shown in FIG. 9 at a position well below the center of the present invention.
- the internal body 2 is positioned within the external body 1. Therefore, the internal body 2 does not possess its own COB 3, as it does not displace water.
- the resulting submersible COG 4 is simply a combination of the first COG 18 and the second COG 35 of the separate entities.
- the COB 3 will remain in the same position because the same amount of water is being displaced.
- the COB 3 will also remain in the same position regardless of the pitch of the submersible due to its position on the pitch center of axis. Due to a lower second COG 35 of the internal body 2, the submersible COG 4 of the combined bodies pulls the overall COG down away from the COB 3 and in turn allows the present invention to gain stability.
- the present invention also comprises of a buoyancy weight set 5, a smart charger 6, a control tether 7, a game pad controller 8, a pair of video glasses 9, and a video receiver 10.
- the buoyancy weight set 5 is an optional addition that is able to fasten onto the sealing fastener ports 134.
- the buoyancy weight set 5 allows users to fine tune the submersible to gain the desired center of buoyancy 3. This may be needed with using the submersible between fresh water and sea water. There is approximately 3% deviation of density between the two types of waters.
- the buoyancy weight set allows the user to account for this deviation when using the submersible in both types of waters.
- To charge the battery packs 33 of the submersible the user can attach the smart charger 6 to the charge port 11.
- the control tether 7 is a long cable that connects the game pad controller 8 with the submersible at the control tether port 12. Additionally the control tether 7 serves to stream video from the submersible to the game pad controller 8.
- the video receiver 10 is connected to the game pad controller 8 and connected to the pair of video glasses 9. By using the pair of video glasses 9, the user will be able to see what the submersible sees and control the submersible remotely with the game pad controller 8.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Aviation & Aerospace Engineering (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Ocean & Marine Engineering (AREA)
- Toys (AREA)
- Motorcycle And Bicycle Frame (AREA)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP20120153107 EP2620358B1 (en) | 2012-01-30 | 2012-01-30 | Remotely operated submersible vehicle |
ES12153107.3T ES2527039T3 (es) | 2012-01-30 | 2012-01-30 | Vehículo sumergible operado de forma remota |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP20120153107 EP2620358B1 (en) | 2012-01-30 | 2012-01-30 | Remotely operated submersible vehicle |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2620358A1 EP2620358A1 (en) | 2013-07-31 |
EP2620358B1 true EP2620358B1 (en) | 2014-10-08 |
Family
ID=45557923
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20120153107 Not-in-force EP2620358B1 (en) | 2012-01-30 | 2012-01-30 | Remotely operated submersible vehicle |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP2620358B1 (es) |
ES (1) | ES2527039T3 (es) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107933856B (zh) * | 2017-12-07 | 2023-12-12 | 青岛策海自动化科技有限公司 | 一种水下机器人 |
CN109515658A (zh) * | 2019-01-08 | 2019-03-26 | 天长市未名机器人有限责任公司 | 水下机器鱼主板舱结构 |
CN109665078B (zh) * | 2019-02-11 | 2024-05-24 | 深圳鳍源科技有限公司 | 遥控潜水器 |
CN109941412B (zh) * | 2019-04-25 | 2024-02-09 | 福州大学 | 一种多功能的通用遥控无人潜水器平台及其应用方法 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2288031A1 (fr) * | 1971-09-21 | 1976-05-14 | France Etat | Engin sous-marin comportant une source d'energie autonome |
WO1985003269A1 (en) * | 1984-01-17 | 1985-08-01 | John Thomas Pado | Remotely operated underwater vehicle |
ZA885156B (en) * | 1987-07-16 | 1989-03-29 | Remotely Operated Vehicles Lim | Underwater remotely controlled vehicle |
US8717844B2 (en) * | 2010-02-23 | 2014-05-06 | Westerngeco L.L.C. | Seismic data acquisition using self-propelled underwater vehicles |
-
2012
- 2012-01-30 EP EP20120153107 patent/EP2620358B1/en not_active Not-in-force
- 2012-01-30 ES ES12153107.3T patent/ES2527039T3/es active Active
Also Published As
Publication number | Publication date |
---|---|
ES2527039T3 (es) | 2015-01-19 |
EP2620358A1 (en) | 2013-07-31 |
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