Apparatus and method for discerning a driver's intent and for aiding the driver

• US 7,239,958 B2
• Filed: 12/18/2003
• Issued: 07/03/2007
• Est. Priority Date: 12/18/2003
• Status: Expired due to Fees

• Current Assignee: GM Global Technology Operations LLC (General Motors Company)
• Original Assignee: General Motors Corporation (General Motors Company)
• Inventors: Grougan, Paul A., Zebehazy, Thomas C.
• Primary Examiner(s): Nguyen; Tan Q.
• Application Number:
  US10/739,615
• Publication Number:
  US 20050137784A1
• Time in Patent Office: 1,293 Days
• Field of Search: 701/200, 701/225, 701/207, 701/300, 701/301, 701/41, 367/99, 367/104, 367/106, 367/117, 367/118, 367/129, 367/130, 342/450, 340/431, 340/435, 340/436, 340/463, 340/903, 340/932.2, 180/167
• US Class Current: 701/200
• CPC Class Codes: B62D 13/06 for backing a normally drawn trailer
• CPC Class Codes: B62D 15/028 Guided parking by providing commands to the driver, e.g. acoustically or optically

Abstract

Methods and apparatus are provided for determining the intent of a driver of a motor vehicle in moving a trailer towed by the motor vehicle along a desired path. The method comprises the step of positioning a first reference point at a first location spaced apart from the motor vehicle and sequentially positioning a second reference point at a plurality of way points along the desired point. A signal relative to the motor vehicle, the first reference point, and the plurality of way points is transmitted as the second reference point is positioned at each of the way points. The transmitted signals corresponding to each of the way points are received and are used to determine the position of the plurality of way points relative to the motor vehicle by a process of triangulation. The position of the plurality of way points indicate positions along the desired path.

Claims

1. A method for creating a path to assist a driver in parking a trailer coupled to a motor vehicle, the method comprising the steps of:

transmitting a first signal from a first transmitter located at a fixed first position to a receiver located in the motor vehicle while the motor vehicle is located at a stationary second position;

transmitting a plurality of second signals from a second transmitter to the receiver while the motor vehicle is located at the second position, each of the plurality of second signals transmitted from a different way point to define the path; and

determining a location of each way point relative to the first position and the second position using triangulation based on the first signal and the plurality of second signals.

2. The method of claim 1 further comprising the steps of:

transmitting a third signal from the second transmitter to the receiver while the second transmitter is positioned proximate a rear corner of the trailer and while the motor vehicle is located at the second position.

3. The method of claim 2 further comprising the step of triangulating the first signal and the third signal to calculate a third position of the rear corner relative to the first position, the second position, and the location of each way point.

4. The method of claim 3 further comprising the steps of:

calculating a current position of the rear corner as the motor vehicle is moved along the path;

calculating the location of the way points relative to the current position as the motor vehicle is moved along the path; and

informing the driver of the current position relative to the location of the way points.

5. The method of claim 3 wherein the step of transmitting a plurality of second signals comprises the step of transmitting a plurality of second signals, one of the plurality of second signals transmitted from each of a plurality of way points located relative to an intended path of one of the first and second rear corners.

6. The method of claim 1 further comprising the steps of:

positioning the second transmitter at a third position spaced apart from the first position and from the second position after the step of transmitting the plurality of second signals; and

transmitting third signals from the second transmitter to the receiver while the motor vehicle is moving along the path to determine a current position of the motor vehicle.

7. The method of claim 6 further comprising the steps of:

transmitting fourth signals from the first transmitter to the receiver while the motor vehicle is moving;

determining a current position of the trailer as the motor vehicle travels along the path by triangulating the fourth signals and the third signals; and

calculating a current position of the trailer relative to the position of the plurality of way points.

8. The method of claim 7 further comprising the step of providing feedback to the driver indicating position of the trailer relative to the position of the plurality of way points.

9. A method for creating a path to assist a driver in parking a motor vehicle the method comprising the steps of:

positioning a first reference point at a fixed first location spaced apart from the motor vehicle;

sequentially positioning a second reference point at a plurality of way points along the path;

transmitting a first signal from the fixed first location to the motor vehicle while the motor vehicle is stationary;

transmitting a second signal from each of the plurality of way points to the motor vehicle while the motor vehicle is stationary;

receiving the transmitted signals; and

using triangulation based on the first signal and the second signals to determine a position of each way point relative to the motor vehicle.

10. The method of claim 9 further comprising the step of fixing a third reference point at a second location spaced apart from the first location and from the motor vehicle.

11. The method of claim 10 further comprising the step of using triangulation to determine the position of the trailer relative to the first location and the second location as the motor vehicle is moved along the path.

12. The method of claim 11 further comprising the step of calculating the position of the trailer relative to the plurality of way points.

13. The method of claim 12 further comprising the step of providing feedback information in response to calculating the position of the trailer relative to the plurality of way points to direct a driver of the motor vehicle.

14. A method for assisting a driver in parking a trailer coupled to a motor vehicle comprising the steps of:

positioning a first beacon at a first fixed location spaced apart from the motor vehicle;

moving a second beacon along a path including a plurality of way points defining the path;

triangulating signals transmitted from the first beacon and the second beacon to determine the coordinates of the plurality of way points relative to the first beacon and the motor vehicle;

transmitting signals from predetermined elements of the trailer to the motor vehicle to determine a position of the elements relative to the motor vehicle and the first beacon;

positioning the second beacon at a second fixed location spaced apart from the first fixed location and from the motor vehicle;

determining the location of the predetermined elements as the motor vehicle moves along the desired path by triangulation;

calculating a position of the predetermined elements relative to the plurality of way points as the motor vehicle moves along the path; and

providing feedback information to the driver in response to the step of calculating.

15. The method of claim 14 wherein the step of providing feedback information comprises the step of providing visual feedback information.

16. The method of claim 14 wherein the step of providing feedback information comprises the step of providing audible feedback information.

17. The method of claim 14 wherein the step of determining the location of predetermined elements comprises the steps of:

determining the location of a right rear corner of the trailer and of a left rear corner of the trailer by positioning the second beacon proximate the right rear corner and transmitting a first signal and positioning the second beacon proximate the left rear corner and transmitting a second signal; and

receiving the first and second signals and using triangulation to determine the coordinates of the right rear corner and the left rear corner, respectively, relative to the motor vehicle.

18. The method of claim 17 further comprising the step of constructing a model of the trailer relative to the motor vehicle in response to determining the location of the right rear corner of the trailer and the left rear corner of the trailer.

19. A system for creating a path to assist a driver in parking a trailer coupled to a motor vehicle comprising:

a first transmitter positioned at a fixed location spaced apart from the motor vehicle and configured to transmit a first signal to the motor;

a second transmitter configured to transmit a second signal at each of a plurality of way points defining the path;

a receiver located in the motor vehicle and configured to receive the first signal and the second while the motor vehicle is stationary;

a calculating device configured to calculate a location of the plurality of way points relative to the fixed location by triangulation in response to the receiver receiving the first signal and the second signals, the calculating device further configured to calculate a location of the trailer relative to the plurality of calculated locations of the way points as the motor vehicle and the trailer move along the path; and

a feedback display configured to provide information to a driver of the motor vehicle relating to the location of the trailer relative to the plurality of calculated locations of the way points.

20. The system of claim 19 wherein the calculating device comprises an engine control unit integral with the motor vehicle.

21. The system of claim 19 wherein the feedback device comprises a visual display visible to a driver of the motor vehicle.

22. The system of claim 19 wherein the feedback device comprises an audible device configured to emit an audible signal discernable by a driver of the motor vehicle if the trailer is not moving along the path.