Vehicle docking assistance system

• US 8,191,915 B2
• Filed: 10/17/2008
• Issued: 06/05/2012
• Est. Priority Date: 10/17/2008
• Status: Active Grant

• Current Assignee: GM Global Technology Operations LLC (General Motors Company)
• Original Assignee: GM Global Technology Operations LLC (General Motors Company)
• Inventors: Freese, Charles E. V, Hendrickson, Brent D.
• Primary Examiner(s): Phan, Hau
• Application Number:
  US12/253,274
• Publication Number:
  US 20100096203A1
• Time in Patent Office: 1,327 Days
• Field of Search: 280/455.1, 280/477, 280/439, 280/511, 303/123, 303/124, 340/431, 340/435, 340/465, 340/539.25, 340/686.2, 145/51, 147/7, 143/9, 151/1, 701/50, 701/213, 180/167
• US Class Current: 280/477
• CPC Class Codes: B60D 1/36 for facilitating connection, e.g. hitch catchers , visual guide means, signalling aids B60D1/465 takes precedence; vehicle signalling in general B60Q; optical arrangements specially adapted for viewing trailer-hitches B60R1/003
• CPC Class Codes: B60D 1/58 Auxiliary devices
• CPC Class Codes: B62D 15/0285 Parking performed automatically

Abstract

An automatic docking system for docking a towing vehicle with a towed vehicle includes a sensing device, a controller, an automatic steering system, an automatic braking system, and a plurality of targets. The sensing device detects the plurality of targets located on a hitch of the towed vehicle. The controller determines the location of the towing vehicle relative to the towed vehicle based on the detection of the plurality of targets. The controller automatically steers the towing vehicle towards the towed vehicle to assist in the docking of the towing vehicle to the towed vehicle. The controller engages the automatic braking system to slow or stop the towing vehicle as required.

Claims

1. A system for assisting in coupling a vehicle to a remote coupling member, the vehicle having at least one steerable wheel, the system comprising:

a vehicle coupling member fixedly secured to the vehicle, wherein the coupling member is configured to receive the remote coupling member;

a sensing device mounted to the vehicle;

a steering system mounted in the vehicle and coupled to the at least one steerable wheel of the vehicle;

an adjustable suspension system operable to control a height of the vehicle;

at least one sensing element attachable to the remote coupling member; and

a controller in communication with the sensing device, the adjustable suspension system, and the steering system, wherein the controller includes a first control logic for receiving a first sensor input signal from the sensing device indicative of the location of the at least one sensing element relative to the vehicle coupling member, a second control logic for receiving a second sensor input signal from the sensing device indicative of the location of the at least one sensing element relative to the vehicle coupling member after the vehicle has moved, a third control logic for determining the location of the vehicle coupling member relative to the remote coupling member by comparing the first input sensor signal to the second input sensor signal, a fourth control logic for sending a steering control signal to the steering control system to steer the vehicle coupling member toward the remote coupling member, and a fifth control logic for sending a suspension control signal to the adjustable suspension system in order to control a height of the vehicle in order to match a height of the vehicle coupling member with a height of the remote coupling member.

2. The system of claim 1 further comprising a braking system in communication with the controller and operable to brake the vehicle, and the controller includes a sixth control logic for sending a braking control signal to the braking system to brake the vehicle.

3. The system of claim 2 further comprising an object sensor mounted on the vehicle and in communication with the controller, wherein the control logic includes a seventh control logic for receiving an object detection signal indicative of an object located between the vehicle and the remote coupling member, wherein the braking control signal is sent when the controller receives the object detection signal.

4. The system of claim 1 wherein the at least one sensing element includes a plurality of targets.

5. The system of claim 4 wherein the targets are placed on the remote coupling member at known locations at known distances apart from one another.

6. The system of claim 5 wherein the controller determines the distance and a steer angle from the first and second input sensor signals by comparing the sensed location of the plurality of targets relative to the known location of the plurality of targets.

7. The system of claim 1 wherein the sensing device is a video camera that optically detects the at least one sensing element.

8. The system of claim 1 wherein the at least one sensing element is magnetically secured to the remote coupling member.

9. The system of claim 1 wherein the sensing device includes a spool having a line that is secured at one end to the spool and secured at an opposite end to the at least one sensing element, and the sensing device is operable to detect the angle from which the line extends out from the sensing device and is operable to detect the length of the line between the sensing device and the sensing element.

10. A method for coupling a vehicle coupling member on a vehicle to a remote coupling member, the method comprising:

sensing a location of a sensing element located on the remote coupling member relative to the vehicle coupling member;

calculating a distance between the vehicle coupling member and the remote coupling member;

calculating a steer angle between the vehicle coupling member and the remote coupling member;

steering the vehicle using an automatic steering system at the steer angle;

controlling an adjustable suspension system in order to control a height of the vehicle in order to match a height of the vehicle coupling member with a height of the remote coupling member;

moving the vehicle;

sensing a location of the sensing element after the vehicle has moved;

determining whether the vehicle coupling member has reached the remote coupling member.

11. The method of claim 10 wherein the method begins when an operator of the vehicle initiates the method.

12. The method of claim 10 further comprising the step of braking the vehicle using an automatic braking system if an object detection sensor detects an object behind the vehicle.

13. The method of claim 10 wherein the steps of calculating the distance and the steer angle include comparing the sensed location of the sensing element to a known location of the sensing element.

14. The method of claim 10 wherein the steer angle is an angle between a longitudinal axis of the remote coupling member relative to the vehicle coupling member.

15. The method of claim 10 wherein the method repeats until the vehicle coupling member has reached the remote coupling member or the operator of the vehicle deactivates the method.