End Surface-Neutral Positioning of a Camera on a Vehicle

• US 20180009395A1
• Filed: 08/15/2017
• Published: 01/11/2018
• Est. Priority Date: 02/16/2015
• Status: Active Grant

• Current Assignee: Bayerische Motoren Werke AG
• Original Assignee: Bayerische Motoren Werke AG
• Inventors: HOFFMANN, Philipp
• Granted Patent: US 10,532,700 B2
• Time in Patent Office: Days
• CPC Class Codes: B60R 11/04 Mounting of cameras operative during drive; Arrangement of controls thereof relative to the vehicle
• CPC Class Codes: B60R 2300/8046 for replacing a rear-view mirror system
• CPC Class Codes: B60R 2300/8066 for monitoring rearward traffic
• CPC Class Codes: H04N 7/188 Capturing isolated or intermittent images triggered by the occurrence of a predetermined event, e.g. an object reaching a predetermined position signal generation from motion picture films H04N5/253

Abstract

A method is provided for determining a position for a camera on an outer skin of a vehicle, the position being determined such that the camera can detect an object at a visual reference point behind the vehicle. The method identifies a lateral surface which, in an initial position, is parallel to an XZ plane of the vehicle at a lateral distance from a central x-axis of the vehicle, the lateral distance depending on a maximum width of the vehicle. The method identifies an axis of rotation for the lateral surface which is parallel to a z-axis of the vehicle and which extends through the visual reference point. The method determines a point of intersection of the lateral surface rotated, starting from the initial position, about the axis of rotation with the outer skin of the vehicle. The method determines the position for the camera based on the point of intersection.

Claims

1. A method for determining a position for a camera on an outer skin of a vehicle such that the camera can capture an object at a visual reference point behind the vehicle, the method comprising the steps of:

ascertaining a lateral area which, in an initial position parallel to an XZ-plane of the vehicle, extends at a lateral distance from a central X-axis of the vehicle, wherein the lateral distance depends on a maximum width of the vehicle;

ascertaining an axis of rotation for the lateral area, which extends parallel to an Z-axis of the vehicle and which extends through the visual reference point;

determining a point of intersection between the lateral area, which, proceeding from the initial position, has been rotated about the axis of rotation, and the outer skin of the vehicle; and

determining the position for the camera depending on the point of intersection.

2. The method as claimed in claim 1, wherein

the lateral distance corresponds to half the maximum width of the vehicle excluding outside mirrors.

3. The method as claimed in claim 1, wherein

the visual reference point is arranged at a predefined reference distance behind a seat reference point of the vehicle;

and

the seat reference point depends on a seat position of the vehicle for a driver of the vehicle.

4. The method as claimed in claim 3, wherein

the predefined reference distance depends on a statutory regulations.

5. The method as claimed in claim 1, wherein

the point of intersection is determined such that the point of intersection satisfies one or more of the following constraints:

(a) a condition that the point of intersection is arranged in front of a seat reference point of the vehicle in the direction of travel of the vehicle;

(b) a condition that the camera, which has a predefined aperture angle, is able to capture, at the position that is determined on the basis of the point of intersection, a predefined region of a lateral environment of the vehicle;

(c) a condition that the camera, which has a predefined aperture angle, is able to capture, at the position that is determined on the basis of the point of intersection, the same region of a lateral environment of the vehicle as an outer mirror of the vehicle; and

(d) a condition that the vehicle has available installation space for receiving the camera at the position that is determined on the basis of the point of intersection.

6. The method as claimed in claim 1, wherein the step of determining the position for the camera comprises:

determining an end surface distance between the point of intersection and the lateral area in the initial position; and

determining the position for the camera also depending on the end surface distance.

7. The method as claimed in claim 6, wherein the step of determining the position for the camera comprises:

ascertaining a lateral distance from the point of intersection along a Y-axis of the vehicle such that there is at least a line of sight between the camera and the visual reference point.

8. The method as claimed in claim 1, wherein the step of determining the position for the camera comprises:

ascertaining a lateral distance from the point of intersection along a Y-axis of the vehicle such that there is at least a line of sight between the camera and the visual reference point.

9. The method as claimed in claim 7, wherein the step of determining the position for the camera comprises:

ascertaining a horizontal area which extends parallel to an XY-plane of the vehicle and which passes through the point of intersection;

ascertaining a further point of intersection of the horizontal area with the outer skin of the vehicle; and

determining the position for the camera depending on the further point of intersection.

10. The method as claimed in claim 1, wherein the step of determining the position for the camera comprises:

ascertaining a horizontal area which extends parallel to an XY-plane of the vehicle and which passes through the point of intersection;

ascertaining a further point of intersection of the horizontal area with the outer skin of the vehicle; and

determining the position for the camera depending on the further point of intersection.

11. The method as claimed in claim 1, wherein the method further comprises:

determining a horizontal distance between an area on which the vehicle stands and a seat reference point of the vehicle, wherein the horizontal distance depends on a load of the vehicle; and

determining the visual reference point depending on the horizontal distance.

12. The method as claimed in claim 9, wherein the method further comprises:

determining a horizontal distance between an area on which the vehicle stands and a seat reference point of the vehicle, wherein the horizontal distance depends on a load of the vehicle; and

determining the visual reference point depending on the horizontal distance.

13. A vehicle, comprising:

a camera configured to capture an object at a visual reference point behind the vehicle in the direction of travel, wherein

the camera is arranged at a position on an outer skin of the vehicle, the position being determined by;

ascertaining a lateral area which, in an initial position parallel to an XZ-plane of the vehicle, extends at a lateral distance from a central X-axis of the vehicle, wherein the lateral distance depends on a maximum width of the vehicle;

ascertaining an axis of rotation for the lateral area, which extends parallel to an Z-axis of the vehicle and which extends through the visual reference point;

determining a point of intersection between the lateral area, which, proceeding from the initial position, has been rotated about the axis of rotation, and the outer skin of the vehicle; and

determining the position for the camera depending on the point of intersection.

14. The vehicle as claimed in claim 13, wherein the vehicle has no outer mirror.