Intelligent tow bar

• US 20070194557A1
• Filed: 01/27/2006
• Published: 08/23/2007
• Est. Priority Date: 01/27/2006
• Status: Abandoned Application

• Current Assignee: Lockheed Martin Corporation (Martin Marietta Corporation)
• Original Assignee: Lockheed Martin Corporation (Martin Marietta Corporation)
• Inventors: Wisniewski, Michael, Caporali, Michael
• Application Number:
  US11/341,031
• Publication Number:
  US 20070194557A1
• Time in Patent Office: Days
• US Class Current: 280/493
• CPC Class Codes: B60D 1/155 comprising telescopic or foldable parts
• CPC Class Codes: B60D 1/167 consisting of articulated or rigidly assembled bars or tubes forming a V-, Y-, or U-shaped draw gear B60D1/173 takes precedence
• CPC Class Codes: B60D 1/242 for supporting braking actions, e.g. braking means integrated with hitches; Braking sensors
• CPC Class Codes: B60D 1/30 for sway control , e.g. stabilising or anti-fishtail devices; Sway alarm means
• CPC Class Codes: B60D 1/58 Auxiliary devices
• CPC Class Codes: B62D 12/02 for vehicles operating in tandem
• CPC Class Codes: B62D 53/00 Tractor-trailer combinations; Road trains traction couplings other than fifth wheel coupling B60D ; tracked vehicles comprising at least two articulated parts B62D55/0655
• CPC Class Codes: B62D 59/04 driven from propulsion unit on trailer

Abstract

A tow bar for connecting and controlling two autonomous vehicles with respect to one another. The tow bar including a plurality of sections with at least one sensor, mounted or coupled onto each, for measuring and determining the orientation of one autonomous vehicle in relation to the other autonomous vehicle. A signal may be transmitted to either or to both of the autonomous vehicles to control propulsion and/or steering and/or braking of the vehicles when an adjustment is required to maintain stability of the tandem vehicles.

Claims

1. A tow bar for connecting a first autonomous vehicle to a second autonomous vehicle in a tandem arrangement, the tow bar comprising:

a first section, said first section capable of being coupled to the first autonomous vehicle and to a strain module;

a second section, said second section capable of being coupled to said strain module and to a roll sensor;

a third section, said third section capable of being coupled to said roll sensor and to a first angular sensor;

a fourth section, said fourth section capable of being coupled to said first angular sensor and to a second angular sensor; and

a terminal section, said terminal section capable of being coupled to said second angular sensor and to the second autonomous vehicle.

2. The tow bar of claim 1, wherein said terminal section comprises:

a fifth section, said fifth section capable of being coupled to said second angular sensor and to a sixth section;

a sixth section, said sixth section capable of being coupled to said fifth section and to the second autonomous vehicle; and

a seventh section, said seventh section capable of being coupled to said fifth section and to the second autonomous vehicle.

3. The tow bar of claim 1, wherein said roll sensor is a detector of a roll angle between said first section and said second section.

4. The tow bar of claim 1, wherein said first angular sensor is a detector of a pitch angle between said third section and said fourth section.

5. The tow bar of claim 4, wherein said pitch angle is an angular displacement of the third section from a plane defined by said terminal section.

6. The tow bar of claim 1, wherein said second angular sensor is a detector of a yaw angle between said fourth section and said fifth section.

7. The tow bar of claim 2, wherein said sixth section is adjustable in length.

8. The tow bar of claim 7, wherein said sixth section includes a plurality of subsections, each said subsection held in position by a biasing mechanism.

9. The tow bar of claim 2, wherein said seventh section is adjustable in length.

10. The tow bar of claim 9, wherein said seventh section includes a plurality of subsections, each said subsection held in position by a biasing mechanism.

11. A method for maintaining a tandem arrangement of a first autonomous vehicle and a second autonomous vehicle, the method comprising:

measuring at least one angle, the at least one angle characterizing an orientation of the first autonomous vehicle relative to the second autonomous vehicle;

measuring a force between the first autonomous vehicle and the second autonomous vehicle;

determining a propulsion, a braking, and a steering of the second autonomous vehicle on the basis of the at least one measured angle and the measured force, the propulsion, the braking, and the steering consistent with maintenance of the tandem arrangement; and

effecting the propulsion, the braking, and the steering of the second autonomous vehicle so as to maintain the tandem arrangement of the first autonomous vehicle and the second autonomous vehicle.

12. The method of claim 11, wherein measuring said at least one angle between the first autonomous vehicle and the second autonomous vehicle includes measuring a roll angle.

13. The method of claim 12, wherein measuring said roll angle includes measuring with a roll sensor.

14. The method of claim 11, wherein measuring said at least one angle between the first autonomous vehicle and the second autonomous vehicle includes measuring a pitch angle.

15. The method of claim 14, wherein measuring said pitch angle includes measuring with an angular motion sensor.

16. The method of claim 11, wherein measuring said at least one angle between said first autonomous vehicle and said second autonomous vehicle includes measuring a yaw angle.

17. The method of claim 16, wherein measuring said yaw angle includes measuring with an angular motion sensor.

18. The method of claim 11, further including transmitting said at least one measured angle.

19. The method of claim 11, wherein measuring said force between the first autonomous vehicle and the second autonomous vehicle includes measuring with a strain module.

20. The method of claim 11, further including transmitting said measured force between the first autonomous vehicle and the second autonomous vehicle.

21. The method of claim 11, further including determining a likelihood of a roll over of the tandem arrangement.

22. A system for maintaining a tandem arrangement of a first autonomous vehicle and a second autonomous vehicle, the method comprising:

means for measuring at least one angle, said at least one angle characterizing an orientation of the first autonomous vehicle relative to the second autonomous vehicle;

means for measuring a force between the first autonomous vehicle and the second autonomous vehicle;

means for determining a propulsion, a braking, and a steering of the second autonomous vehicle on the basis of said at least one measured angle and said measured force, said propulsion, said braking, and said steering consistent with maintenance of the tandem arrangement; and

means for effecting said propulsion, said braking, and said steering of the second autonomous vehicle so as to maintain the tandem arrangement of the first autonomous vehicle and the second autonomous vehicle.

23. The system of claim 22, further including means for transmitting said at least one measured angle.

24. The system of claim 22, further including means for transmitting said measured force.

25. A multi-vehicle control system, the system comprising:

a first vehicle;

a second vehicle; and

a tow bar interconnecting said first vehicle with said second vehicle, said tow bar comprising a plurality of sections and at least one sensor, said sensor coupled to at least one of said sections and for measuring an orientation of said first vehicle in relation to said second vehicle.

26. The multi-vehicle control system of claim 25, wherein said tow bar comprises:

a first section, said first section capable of being coupled to said first autonomous vehicle and to a strain module;

a second section, said second section capable of being coupled to said strain module and to a roll sensor;

a third section, said third section capable of being coupled to said roll sensor and to a first angular sensor;

a fourth section, said fourth section capable of being coupled to said first angular sensor and to a second angular sensor; and

a terminal section, said terminal section capable of being connected to said second angular sensor and to said second autonomous vehicle.

27. The multi-vehicle control system of claim 26, wherein said terminal section comprises:

a fifth section, said fifth section capable of being coupled to said second angular sensor and to a sixth section;

a sixth section, said sixth section capable of being coupled to said fifth section and to said second autonomous vehicle; and

a seventh section, said seventh section capable of being coupled to said fifth section and to the second autonomous vehicle.