System and method for controlling an automatic liftgate in a motor vehicle

Patent metadata

Field	Value
Publication number	US-10676979-B2
Application number	US-201816161888-A
Country	US
Kind code	B2
Filing date	Oct 16, 2018
Priority date	Oct 16, 2018
Publication date	Jun 9, 2020
Grant date	Jun 9, 2020

Abstract

A method for controlling an automatic liftgate in a vehicle includes detecting a garage door frame of a garage using a front camera or a rear camera mounted on the vehicle, determining a garage height of the garage door frame, determining whether the vehicle has entered the garage, and setting a custom height to which the automatic liftgate can open to the garage height of the garage door frame when the vehicle has entered the garage.

First claim

What is claimed is:

1. A method for controlling an automatic liftgate in a vehicle, the method comprising:
detecting a garage doorframe of a garage using a front camera or a rear camera mounted on the vehicle;
determining a garage height of the garage door frame;
determining whether the vehicle has entered the garage; and
setting a custom height to which the automatic liftgate can open to the garage height of the garage door frame when the vehicle has entered the garage.

2. The method of claim 1 further comprising determining a vehicle speed of the vehicle and wherein detecting the garage door frame occurs if the vehicle speed is less than a speed threshold.

3. The method of claim 2 wherein the speed threshold is about 5 mph.

4. The method of claim 1 further comprising determining an operating state of the vehicle and wherein detecting the garage door frame occurs if the operating state of the vehicle is in Drive or Reverse.

5. The method of claim 1 wherein the garage height of the garage door frame is measured from an upper horizontal edge to a lower horizontal edge of the garage door frame.

6. The method of claim 1 further comprising setting the automatic liftgate to open to a maximum height if the vehicle has not entered the garage.

7. The method of claim 1 wherein determining the garage height of the garage door frame includes using an edge detection and classification algorithm to detect an upper horizontal edge and a lower horizontal edge of the garage door frame and to provide a confidence metric to the garage height.

8. The method of claim 7 further comprising setting a fully open height to which the automatic liftgate can open if the confidence metric is below a threshold.

9. The method of claim 1 wherein determining the garage height of the garage door frame includes using a convolutional neural network (CNN) algorithm.

10. The method of claim 1 further comprising comparing the garage height to a range of standardized garage heights to determine if the garage height is within an expected range.

11. The method of claim 1 further comprising determining whether the vehicle is at a home location.

12. The method of claim 11 further comprising saving the garage height and associating the garage height to the home location if the vehicle is at the home location.

13. The method of claim 12 wherein determining whether the vehicle is at the home location includes determining if a user switch in the vehicle was activated to open the garage.

14. The method of claim 12 wherein determining whether the vehicle is at the home location includes using a Global Navigation Satellite System (GNSS) in the vehicle to determine if the vehicle is at the home location.

15. The method of claim 12 wherein determining whether the vehicle is at the home location includes using a vehicle communication system to determine if the vehicle has connected to a known Wi-Fi network at the home location.

16. The method of claim 1 further comprising notifying a user of the vehicle when the automatic liftgate is set to open at the garage height.

17. The method of claim 1 further comprising storing the garage height if the vehicle is keyed off, determining whether the vehicle has moved when the vehicle is keyed back on, and setting the automatic liftgate to open to the garage height if the vehicle has not moved.

18. The method of claim 1 further comprising setting the custom height to which the automatic liftgate can open to the garage height less an offset amount when the vehicle has entered the garage.

19. A system for controlling an automatic liftgate in a motor vehicle, the system comprising:
memory storing computer executable instructions; and
at least one processor configured to read and execute the computer executable instructions, the computer executable instructions causing the at least one processor to:
detect a garage door frame of a garage using a front camera or a rear camera mounted on the vehicle;
determine a garage height of the garage door frame;
determine whether the vehicle has entered the garage; and
set a custom height to which the automatic liftgate can open to the garage height of the garage doorframe when the vehicle has entered the garage.

20. A system in a motor vehicle, the system comprising:
an automatic liftgate connected to the motor vehicle;
a motor connected to the automatic liftgate, the motor configured to move the automatic liftgate between a closed position, an open position, and a custom position upon receipt of an input command;
a liftgate control module in communication with the motor;
a camera mounted to the motor vehicle;
a video processing module in communication with the liftgate control module and the camera, wherein the video processing module detects a garage door frame of a garage using the camera and determines a garage height of the garage door frame;
wherein the liftgate control sets the custom position to which the automatic liftgate can open to the garage height of the garage door frame when the vehicle has entered the garage.

Assignees

• Gm Global Tech Operations Llc
• Gm Giobal Tech Operations Llc

Inventors

• Naserian Mohammad
• Lewis Allan K
• Chaney Jr Michael T

Classifications

• B60J5/102

  comprising door or part of door being pivotable downwards about horizontal axis to open position · CPC title

• E05F15/73 Primary

  responsive to movement or presence of persons or objects · CPC title

• E05Y2900/546

  Tailboards, tailgates or sideboards opening upwards · CPC title

• B60Y2400/3015

  Optical cameras · CPC title

• E05F2015/767

  using cameras · CPC title