UNMANNED SUBMERSIBLE VEHICLES AND METHODS FOR OPERATING THE SAME IN A BODY OF LIQUID

• US 20120137949A1
• Filed: 05/07/2009
• Published: 06/07/2012
• Est. Priority Date: 05/09/2008
• Status: Active Grant

• Current Assignee: iRobot Corporation
• Original Assignee: iRobot Corporation
• Inventors: Vosburgh, Frederick
• Granted Patent: US 8,418,642 B2
• Time in Patent Office: Days
• US Class Current: 114/330
• CPC Class Codes: B63G 2008/002 unmanned
• CPC Class Codes: B63G 8/001 Underwater vessels adapted for special purposes, e.g. unmanned underwater vessels; Equipment specially adapted therefor, e.g. docking stations self-propelled or direction controlled diving chambers with mechanical link to a base B63C11/42
• CPC Class Codes: B63G 8/22 Adjustment of buoyancy by water ballasting; Emptying equipment for ballast tanks conduits for emptying or ballasting on vessels in general B63B13/00; stabilising vessels using ballast tanks B63B43/06
• CPC Class Codes: F42B 12/365 Projectiles transmitting information to a remote location using optical or electronic means F42B12/385 takes precedence
• CPC Class Codes: F42B 19/005 Nose caps for torpedoes; Coupling torpedo-case parts together
• CPC Class Codes: F42B 19/38 with means for causing torpedoes to surface at end of run

Abstract

An unmanned submersible vehicle for use in a body of liquid having a top surface and in air overlying the top surface includes a hull, an integral antenna, and an antenna positioning system. The hull has first and second opposed ends. The hull includes a first hull portion adjacent the first end and a second hull portion adjacent the second end. The antenna is disposed within the first hull portion and/or is mounted on the first hull portion. The antenna positioning system is configured to reorient the hull from a transit position to a signal position. When the hull is in the signal position: the first hull portion and the antenna are disposed above the second hull portion a greater vertical distance than when the hull is in the transit position; the first hull portion and the antenna are disposed above the top surface and in the air while at least the second hull portion remains submerged in the body of liquid; and the antenna is operative to emit signals through the air above the top surface and/or to receive signals through the air above the top surface.

Claims

1. An unmanned submersible vehicle for use in a body of liquid having a top surface and in air overlying the top surface, the vehicle comprising:

a hull having first and second opposed ends, the hull including a first hull portion adjacent the first end and a second hull portion adjacent the second end;

an integral antenna disposed within the first hull portion; and

an antenna positioning system configured to reorient the hull from a transit position to a signal position, wherein, when the hull is in the signal position;

the first hull portion and the antenna are disposed above the second hull portion a greater vertical distance than when the hull is in the transit position;

the first hull portion and the antenna are disposed above the top surface and in the air while at least the second hull portion remains submerged in the body of liquid; and

the antenna is operative to emit signals through the air above the top surface and/or to receive signals through the air above the top surface.

2. The vehicle of claim 1 wherein:

the vehicle has a center of buoyancy (CB) and a center of mass (CM);

the antenna positioning system is configured to reorient the hull from the transit position to the signal position by changing pitching moments tending to counteract CB and CM-induced moments during transit, changing the buoyancy of the vehicle and/or altering the position of at least one of the CB and the CM; and

when the hull is in the signal position, the CB is located vertically above the CM.

3. The vehicle of claim 2 where the antenna positioning system is configured to reorient the hull by altering the relative positions of the CB and the CM within the hull.

4. The vehicle of claim 2 where the antenna positioning system is configured to reorient the hull by altering the position of at least one of the CB and the CM with respect to the hull.

5. The vehicle of claim 2 where the antenna positioning system is configured to reorient the hull by altering the buoyancy of the vehicle.

6. The vehicle of claim 5 including a flood tank, wherein the antenna positioning system is configured to reorient the hull from the transit position to the signal position by altering an amount of the liquid from the body of liquid in the flood tank to thereby controllably alter the buoyancy of the vehicle.

7. The vehicle of claim 2 wherein the antenna positioning system is configured to reorient the hull by changing a pitching moment.

8. The vehicle of claim 1 including a propulsion system to forcibly and controllably drive and steer the vehicle through the body of liquid in the transit position and/or down into the body of liquid from the signal position to fully submerge the hull in the body of liquid.

9. The vehicle of claim 1 including a sensing device mounted on and/or in the hull to sense a parameter external to the vehicle.

10. The vehicle of claim 1 including a communications device operably connected to the antenna to generate and/or receive and process signals propagated through the air over the top surface.

13. The vehicle of claim 1 wherein:

the hull is elongated and defines a longitudinal axis;

the longitudinal axis is substantially horizontal when the hull is in the transit position; and

the longitudinal axis is substantially vertical when the hull is in the signal position.

25. The vehicle of claim 1 wherein the vehicle is not tethered to another object.

26. The vehicle of claim 25 including a propulsion system to forcibly and controllably drive and steer the vehicle through the body of liquid in the transit position and/or down into the body of liquid from the signal position to fully submerge the hull in the body of liquid.

27. The vehicle of claim 1 wherein, when the hull is in the signal position, the antenna is disposed entirely in the hull and is operative to emit signals through the air above the top surface and/or to receive signals through the air above the top surface.

11. (canceled)

12. (canceled)

14. A communications system for use in a body of liquid having a top surface and in air overlying the top surface, the communications system comprising:

a plurality of unmanned submersible vehicles adapted to be distributed in the body of liquid, each of the vehicles including;

a hull having first and second opposed ends, the hull including a first hull portion adjacent the first end and a second hull portion adjacent the second end;

an integral antenna disposed within the first hull portion;

an antenna positioning system configured to reorient the hull from a transit position to a signal position, wherein, when the hull is in the signal position;

the first hull portion and the antenna are disposed above the second hull portion a greater vertical distance than when the hull is in the transit position;

the first hull portion and the antenna are disposed above the top surface and in the air while at least the second hull portion remains submerged in the body of liquid; and

the antenna is operative to emit signals through the air above the top surface and/or to receive signals through the air above the top surface; and

a communications device operably connected to the antenna to generate and/or receive and process signals propagated through the air over the top surface.

15. A method for operating an unmanned submersible vehicle, the method comprising:

providing an unmanned submersible vehicle including;

a hull having first and second opposed ends, the hull including a first hull portion adjacent the first end and a second hull portion adjacent the second end;

an integral antenna disposed within the first hull portion;

an antenna positioning system configured to reorient the hull from a transit position to a signal position; and

using the antenna positioning system, reorienting the hull from a transit position to a signal position, wherein, when the hull is in the signal position;

the first hull portion and the antenna are disposed above the second hull portion a greater vertical distance than when the hull is in the transit position;

the first hull portion and the antenna are disposed above the top surface and in the air while at least the second hull portion remains submerged in the body of liquid; and

the antenna is operative to emit signals through the air above the top surface and/or to receive signals through the air above the top surface.

16. The method of claim 15 including reorienting the hull from the transit position to the signal position by changing pitching moments tending to counteract CB and CM-induced moments during transit, changing the buoyancy of the vehicle and/or altering the position of at least one of the CB and the CM, wherein, when the hull is in the signal position, the CB is located vertically above the CM.

17. The method of claim 16 including reorienting the hull from the transit position to the signal position by altering the relative positions of the CB and the CM within the hull.

18. The method of claim 16 including reorienting the hull from the transit position to the signal position by altering the position of at least one of the CB and the CM with respect to the hull.

19. The method of claim 16 including reorienting the hull from the transit position to the signal position by altering the buoyancy of the vehicle.

20. The method of claim 15 wherein the vehicle includes a propulsion system to and including forcibly and controllably driving and steering the vehicle through the body of liquid in the transit position using the propulsion system.

21. The method of claim 15 wherein the vehicle includes a propulsor and including forcibly driving the vehicle down into the body of liquid from the signal position using the propulsor to fully submerge the hull in the body of liquid.

22. The method of claim 15 including sensing a parameter external to the vehicle using a sensing device mounted on and/or in the hull.

23. The method of claim 15 including generating and/or receiving and processing signals propagated through the air over the top surface using a communications device operably connected to the antenna.

24. The method of claim 15 including propelling the vehicle through the body of water in a fully submerged condition while in the transit position, wherein:

the hull is elongated and defines a longitudinal axis;

the longitudinal axis is substantially horizontal when the hull is in the transit position; and

the longitudinal axis is substantially vertical when the hull is in the signal position.

28. The method of claim 15 wherein the vehicle is not tethered to another object.

29. The method of claim 28 wherein the vehicle includes a propulsion system and including forcibly and controllably driving and steering the vehicle through the body of liquid in the transit position using the propulsion system.

30. The method of claim 15 wherein, when the hull is in the signal position, the antenna is disposed entirely in the hull and is operative to emit signals through the air above the top surface and/or to receive signals through the air above the top surface.