Obstacle avoidance system for aircraft

Patent metadata

Field	Value
Publication number	US-10838068-B2
Application number	US-201816176238-A
Country	US
Kind code	B2
Filing date	Oct 31, 2018
Priority date	Nov 7, 2017
Publication date	Nov 17, 2020
Grant date	Nov 17, 2020

Abstract

An obstacle avoidance system for an aircraft includes distance sensors mounted to the aircraft. The distance sensors each have one or more lasers for illuminating nearby obstacles and a detector for receiving laser light reflected off the nearby obstacles. A controller is configured for controlling the distance sensors and for determining distances between the distance sensor and the nearby obstacles based on data received from the detector. At least one camera may be externally mounted to the aircraft to provide images of the nearby obstacles. A user interface displays the images and the distances of the nearby obstacles.

First claim

The invention claimed is:

1. An obstacle avoidance system for an aircraft, comprising:
a plurality of distance sensors mounted to the aircraft, the plurality of distance sensors each having one or more lasers for illuminating nearby obstacles and a detector for receiving laser light reflected off the nearby obstacles, wherein the plurality of distance sensors provide a laser-scanning pattern in a two-dimensional plane that extends wider than a wingspan of the aircraft and higher than a tail of the aircraft for identifying potential collisions with nearby obstacles;
a controller configured for controlling the plurality of distance sensors and for determining distances between each distance sensor and the nearby obstacles based on data received from each detector;
a user interface for displaying information about the distances, wherein the user interface provides an alert when a nearby obstacle has been identified for a potential collision; and
at least one camera mounted to the aircraft for imaging an area adjacent the aircraft, wherein information about distances of nearby obstacles is coupled with images from the at least one camera and displayed on the user interface.

2. The obstacle avoidance system of claim 1 , wherein the user interface is a mobile interface for providing information about distances of nearby obstacles remotely.

3. The obstacle avoidance system of claim 1 , wherein the plurality of distance sensors are mounted in a respective plurality of locations on an exterior of the aircraft for illuminating obstacles nearby wings and a fuselage of the aircraft.

4. The obstacle avoidance system of claim 3 , wherein the plurality of distance sensors are mounted in an aft-facing direction for illuminating obstacles behind the wings and the fuselage of the aircraft.

5. The obstacle avoidance system of claim 1 , wherein the plurality of distance sensors each include a flush mount such that the one or more lasers and the detector are retracted with respect to an outer skin surface of the aircraft.

6. The obstacle avoidance system of claim 1 , wherein the controller is adapted to operate the plurality of distance sensors when a weight-on-wheels signal is received indicating that the aircraft is on the ground.

7. An obstacle avoidance system for an aircraft, comprising:
at least one laser externally mounted to the aircraft for illuminating nearby obstacles with laser light;
at least one detector externally mounted to the aircraft for receiving laser light reflected off of the nearby obstacles;
a controller for determining distances of the nearby obstacles based on information received from the at least one detector;
at least one camera externally mounted to the aircraft for providing images of the nearby obstacles;
a user interface for displaying the images and the distances of the nearby obstacles;
the at least one laser is adapted to illuminate an illumination field adjacent the aircraft wherein the illumination field extends wider than a wingspan of the aircraft and higher than a tail of the aircraft for identifying potential collisions with nearby obstacles;
the at least one camera is adapted to capture images of the illumination field adjacent the aircraft and the user interface is adapted to display the images of the illumination field; and
the user interface is adapted to display distances of nearby obstacles overlaid upon images of the illumination field and update the distances in real time while the aircraft is moving.

8. The obstacle avoidance system of claim 7 , further comprising a housing that partially encloses the at least one laser and the at least one detector to form a modular unit, wherein the modular unit may be installed on existing aircraft as a retrofit, and the housing is mounted flush within an external surface of the aircraft.

9. The obstacle avoidance system of claim 7 , wherein the at least one laser, the at least one detector, and the at least one camera are oriented in an aft-facing direction such that the illumination field is positioned behind the wings and fuselage of the aircraft.

10. The obstacle avoidance system of claim 7 , wherein the user interface provides images of nearby obstacles with distance information for avoiding collisions while taxiing the aircraft.

11. The obstacle avoidance system of claim 7 , wherein the system remains idle when a weight-on-wheels signal is off, and the system becomes active when a weight-on-wheels signal is on.

12. The obstacle avoidance system of claim 7 , wherein the at least one laser emits pulses of laser light, wherein each pulse produces an echo after reflecting off of nearby objects, such that the controller determines distances to the nearby objects based on time-of-flight measurements of the pulses of laser light.

13. The obstacle avoidance system of claim 1 , wherein the plurality of distance sensors comprise a sensor array configured to receive a plurality of echoes reflected off of one or more objects adjacent the aircraft, wherein the controller determines one or more distance measurements for the one or more objects, respectively, based on the plurality of echoes received.

14. The obstacle avoidance system of claim 13 , wherein the sensor array is configured to provide redundant information about the one or more objects adjacent the aircraft, and the controller is adapted to analyze the redundant information such that the controller determines one or more distance measurements with improved accuracy for the one or more objects, respectively, based on the redundant information.

Assignees

• Textron Aviation Inc
• Textron Innovations Inc

Inventors

• Lukoschat Jens Jorgen
• Johnson Andrew Kent

Classifications

• B64U2101/30

  for imaging, photography or videography · CPC title

• B64D47/08

  Arrangements of cameras · CPC title

• G01S17/933 Primary

  of aircraft or spacecraft · CPC title

• B64D45/00

  Aircraft indicators or protectors not otherwise provided for · CPC title

• G01S17/87

  Combinations of systems using electromagnetic waves other than radio waves · CPC title