Method and system for aircraft taxi strike alerting

Patent metadata

Field	Value
Publication number	US-10096256-B2
Application number	US-201715451969-A
Country	US
Kind code	B2
Filing date	Mar 7, 2017
Priority date	Mar 7, 2017
Publication date	Oct 9, 2018
Grant date	Oct 9, 2018

Abstract

Apparatus and associated methods relate to calculating position and/or range data of object(s) in a scene external to an aircraft. A light projector is configured to project, from an aircraft projector location, a collimated beam of light in a controllable direction onto the scene. The light projector is further configured to control the intensity of the projected light, based on the controlled direction of the collimated beam of light. The reflected beam is detected by a camera located apart from the light projector. An image processor is configured to use triangulation, to calculate position values and/or range data of the object(s) in the scene. The image processor can be further configured to identify the object(s) in the scene and to produce, based in object(s) in the scene, one or more maps of the scene. The intensity of the collimated beam can be controlled based on the produced maps.

First claim

The invention claimed is:

1. A system for calculating position values and/or range data of object(s) in a scene external to an aircraft, the system comprising:
a light projector mounted at a projector location on the aircraft and configured to project a collimated beam of light in a controllable direction onto the scene external to the aircraft, the light projector further configured to control an intensity of the projected collimated beam of light, based on the controllable direction of the collimated beam of light;
a camera mounted at a camera location on the aircraft and configured to receive a portion of the collimated beam reflected by the scene, and further configured to focus the received portion onto a focal plane array comprising a plurality of light-sensitive pixels, thereby forming an image of the scene, the image comprising pixel data generated by the plurality of light-sensitive pixels; and
an image processor configured to identify pixel coordinates corresponding to a subset of the plurality of light-sensitive pixels upon which the received portion of the collimated beam reflected by the scene is focused, the image processor further configured to use triangulation, based on the projector location, the camera location, and the identified pixel coordinates, to calculate the position values and/or range data of object(s) in the scene by which the collimated beam of light is reflected.

2. The system of claim 1 , wherein the image processor is further configured to classify, based on the image formed by the camera, the object(s) in the scene.

3. The system of claim 2 , wherein the image processor is further configured to correlate the object(s) identified in the image of the scene with the controllable direction of the collimated beam of light.

4. The system of claim 3 , wherein the light projector is further configured to control the intensity of the projected light, based on the identified object(s) correlated to the controllable direction of the collimated beam of light.

5. The system of claim 2 , wherein the image processor is further configured to produce, based in the identified object(s) in the scene, one or more maps of the scene.

6. The system of claim 5 , wherein the one or more maps of the scene includes a map of object(s) moving with respect to a ground reference.

7. The system of claim 5 , wherein the one or more maps of the scene includes a map of object(s) not moving with respect to a ground reference.

8. The system of claim 5 , wherein the one or more maps of the scene includes a map of object(s) not moving with respect to an aircraft reference.

9. The system of claim 5 , wherein the one or more maps of the scene includes a map of an intensity ratio of an intensity of the received portion to the controlled intensity of the projected collimated beam.

10. The system of claim 5 , wherein the one or more maps of the scene includes a map of reflectivity of object(s) in the scene.

11. The system of claim 10 , wherein the light projector controls, based on the map of reflectivity, the intensity of the projected beam of collimated light such that the intensity of the beam of collimated light is higher when the beam is directed toward low-reflectivity object(s) than when directed toward high-reflectivity object(s).

12. The system of claim 1 , wherein the collimated beam of light projected by the light projector comprises infrared light and the camera is an infrared camera and the light-sensitive pixels are sensitive to infrared light.

13. The system of claim 12 , wherein the collimated beam of light projected by the light projector comprises infrared light having a wavelength corresponding to a lower solar intensity portion or to an atmospheric absorption band.

14. The system of claim 1 , wherein the image processor is further configured to generate an alert signal if the calculated position values and range data of object(s) indicate that object(s) are within a collision zone or on a collision trajectory.

15. The system of claim 1 , wherein the system further comprises:
an audible alarm that is activated when the calculated position values and range data indicate one or more of the object(s) in the scene has a combination of an object range and an object direction relative to the aircraft corresponding to a risk of collision above a predetermined threshold.

16. The system of claim 14 , wherein the cockpit notification system includes a display device configured to display the image of the scene annotated with the calculated position and/or range data.

17. A method for generating an alert signal of a potential aircraft collision for a taxiing aircraft, the method comprising the steps of:
projecting a beam of collimated light in a controllable direction onto a scene;
controlling an intensity of the projected beam of collimated light, based on the controlled direction of the projected beam of collimated light;
receiving a portion of the beam of collimated light reflected by the scene;
focusing the received portion of the beam of collimated light onto a focal plane array comprising a plurality of light-sensitive pixels, thereby forming an image of the scene, the image comprising pixel data generated by the plurality of light-sensitive pixels;
identifying pixel coordinates corresponding to a subset of the plurality of light-sensitive pixels upon which the received portion of the collimated beam reflected by the scene is focused;
calculating, based on a projector location, a camera location, and the identified pixel coordinates, position values and/or range data of object(s) in the scene by which the collimated beam of light is reflected; and
generating an alert signal if the calculated position values and range data of the object(s) indicate that one or more of the object(s) are within a collision zone or on a collision trajectory.

18. The method for generating an alert signal of a potential aircraft collision of claim 17 , further comprising:
correlating the object(s) identified in the image of the scene with the controllable direction of the collimated beam of light.

19. The method for generating an alert signal of a potential aircraft collision of claim 18 , further comprising:
controlling the intensity of the projected light, based on identified object(s) correlated to the controllable direction of the collimated beam of light.

20. The method for generating an alert signal of a potential aircraft collision of claim 17 , further comprising:
producing, based on the identified object(s) in the scene, one or more maps of the scene.

Assignees

• Rosemount Aerospace Inc

Inventors

• Rutkiewicz Robert
• Ell Todd Anthony
• Pesik Joseph T

Classifications

• H04N23/56

  provided with illuminating means · CPC title

• G01S17/89

  for mapping or imaging · CPC title

• G01S7/4808

  Evaluating distance, position or velocity data · CPC title

• G01S17/48

  Active triangulation systems, i.e. using the transmission and reflection of electromagnetic waves other than radio waves · CPC title

• B64D47/02

  Arrangements or adaptations of signal or lighting devices · CPC title