Wireless spread spectrum ground link-based aircraft data communication system for engine event reporting

• US 6,353,734 B1
• Filed: 11/13/2000
• Issued: 03/05/2002
• Est. Priority Date: 06/25/1999
• Status: Expired

• Current Assignee: Harris Corporation (L3Harris Technologies, Inc.)
• Original Assignee: Harris Corporation (L3Harris Technologies, Inc.)
• Inventors: Wright, Thomas H., Ziarno, James J.
• Primary Examiner(s): Crosland, Donnie L.
• Application Number:
  US09/711,436
• Time in Patent Office: 477 Days
• Field of Search: 455/66, 455/67.1, 455/54.1, 455/98, 455/33.1, 455/431, 701/14, 701/35, 340/961, 340/971, 340/539, 340/945, 340/825.69, 340/725.72, 340/3.43, 375/130, 370/310, 370/316, 342/33, 342/36
• US Class Current: 455/98
• CPC Class Codes: G07C 5/00 Registering or indicating the working of vehicles
• CPC Class Codes: G08G 5/0013 with a ground station
• CPC Class Codes: G08G 5/0021 located in the aircraft
• CPC Class Codes: G08G 5/0065 for taking-off
• CPC Class Codes: H04B 7/18506 Communications with or from aircraft, i.e. aeronautical mobile service

Abstract

The system and method of the present invention provides a record of the performance of an aircraft engine. A plurality of sensors sense engine conditions and generate engine data. A ground data link unit is positioned within the aircraft and receives the engine data. A wideband spread spectrum transmitter that can be part of a transceiver downloads the engine data to a ground based spread spectrum receiver that can be part of a transceiver, and receives the wideband spread spectrum communication signal from the aircraft. It demodulates the wideband spread spectrum communication signal to obtain the engine data.

Claims

1. A system for providing a record of the performance of an aircraft engine comprising:

a plurality of sensors positioned on the aircraft for sensing engine conditions and generating engine data relating to operation of the engine;

a ground data link unit positioned within the aircraft and operatively connected to said plurality of sensors for receiving said engine data, said ground data link unit comprising;

a) a data store operative to accumulate and store the engine data, and

b) a wideband spread spectrum transceiver coupled to said data store, and comprising a transmitter that is operative to download said engine data that has been accumulated and stored by said data store over a wideband spread spectrum communication signal; and

a ground based spread spectrum transceiver for receiving the wideband spectrum communication signal from the aircraft and demodulating the wideband spread spectrum communication signal to obtain the engine data.

2. A system according to claim 1, wherein said aircraft includes a FADEC engine control system, wherein said sensors are operatively connected to said FADEC engine control system.

3. A system according to claim 1, wherein said sensors are positioned to sense at least one of said core compartment bleeding, sump pressurization, sump vent, active clearance control, and low pressure and high pressure recoup.

4. A system according to claim 1, wherein said sensors are positioned to sense at least one of oil pressure, oil temperature, fuel flow and engine hydraulics.

5. A system according to claim 1, and further comprising a plurality of sensors located throughout the aircraft for sensing routine aircraft conditions and generating parametric data such as received by a flight data recorder representative of aircraft flight performance during a flight of said aircraft.

6. A system according to claim 5, and further comprising a multiplexer connected to said plurality of sensors and ground data link unit for receiving the parametric data and multiplexing the parametric-data for delivery to said ground data link unit.

7. A system according to claim 1, and further comprising a ground based server connected to said ground based spread spectrum receiver for receiving said engine data for further processing of said engine data.

8. A system according to claim 1, and further comprising a remote flight operations center operatively coupled to said ground based spread spectrum transceiver for receiving and processing engine data downloaded from said aircraft.

9. A system according to claim 1, wherein the wideband spread spectrum communication signal comprises a direct sequence spread spectrum signal.

10. A system according to claim 1, wherein the wideband spread spectrum communication signal comprises a frequency hopping spread spectrum signal.

11. A system according to claim 1, wherein said data store comprises an archival data store.

12. A system according to claim 1, wherein said ground data link unit is operative to store flight performance data and download said flight performance data over said wideband spread spectrum communication signal.

13. A method of providing a record of the performance of an aircraft engine comprising:

collecting engine data within a ground data link unit during at least initial take-off of an aircraft from an airport;

processing the engine data within a central processing unit of the ground data link unit to determine engine problems;

upon initial take-off, downloading the engine data that has been collected during initial take-off over a wideband spread spectrum communication signal to a ground based spread spectrum receiver; and

demodulating within the ground based spread spectrum receiver the wideband spread spectrum communication signal to obtain the engine data for further processing.

14. A method according to claim 13, and further comprising the step of forwarding the engine data to a ground based server connected to the ground based spread spectrum receiver and processing the engine data within the ground based server.

15. A method according to claim 13, wherein the wideband spread spectrum communication signal comprises a direct sequence spread spectrum signal.

16. A method according to claim 13, wherein the wideband spread spectrum communication signal comprises frequency hopping spread spectrum signal.

17. A method of providing a record of the performance of an aircraft engine comprising:

collecting engine data within a ground data link unit during engine operation;

downloading the engine data that has been collected over a wideband spread spectrum communication signal to a ground based spread spectrum receiver; and

demodulating within the ground based spread spectrum receiver the wideband spread spectrum communications signal to obtain the engine data for further processing.

18. A method according to claim 17, and further comprising the step of collecting engine data within an archival data store of the ground data link unit.

19. A method according to claim 17, and further comprising the step of collecting engine data during at least initial take-off of the aircraft.

20. A method according to claim 19, and further comprising the step of downloading the engine data upon initial take-off.

21. A method according to claim 17, wherein the wideband spread spectrum communication signal comprises a direct sequence spread spectrum communication signal.

22. A method according to claim 17, wherein the wideband spread spectrum communication signal comprises a frequency hopping spread spectrum communication signal.

23. A method according to claim 17, wherein the ground based spread spectrum receiver comprises a transceiver.