Acoustic catastrophic event detection and data capture and retrieval system for aircraft

• US 5,798,458 A
• Filed: 10/28/1996
• Issued: 08/25/1998
• Est. Priority Date: 10/11/1996
• Status: Expired due to Term

• Current Assignee: e-Watch, Inc. (Cision Ltd.)
• Original Assignee: Raytheon TI Systems, Inc. (Rtx Corporation)
• Inventors: Monroe, David A.
• Primary Examiner(s): Williams, Hezron E.
• Assistant Examiner(s): MILLER, ROSE MARY
• Application Number:
  US08/738,487
• Time in Patent Office: 666 Days
• Field of Search: 73/587, 364/424.06, 364/439, 364/DIG. 1, 364/DIG. 2, 360/5, 342/32, 342/36, 342/357, 340/945, 701/14
• US Class Current: 73/587
• CPC Class Codes: B64D 45/0053 using visual equipment, e.g. cameras
• CPC Class Codes: B64D 45/0056 detecting passenger or crew behavior by sensors, e.g. biometrics
• CPC Class Codes: B64D 45/0059 by communicating emergency situations to ground control or between crew members
• CPC Class Codes: G01S 3/8006 Multi-channel systems specially adapted for direction-finding, i.e. having a single aerial system capable of giving simultaneous indications of the directions of different signals
• CPC Class Codes: G01S 3/808 using transducers spaced apart and measuring phase or time difference between signals therefrom, i.e. path-difference systems
• CPC Class Codes: G08B 13/19634 Electrical details of the system, e.g. component blocks for carrying out specific functions
• CPC Class Codes: G08B 13/19645 Multiple cameras, each having view on one of a plurality of scenes, e.g. multiple cameras for multi-room surveillance or for tracking an object by view hand-over
• CPC Class Codes: G08B 13/1965 the vehicle being an aircraft
• CPC Class Codes: G08B 13/1966 Wireless systems, other than telephone systems, used to communicate with a camera
• CPC Class Codes: G08B 13/19695 Arrangements wherein non-video detectors start video recording or forwarding but do not generate an alarm themselves
• CPC Class Codes: H04B 7/18506 Communications with or from aircraft, i.e. aeronautical mobile service

Abstract

An acoustic sensor system is provided for detecting failures or terrorist events in commercial aviation and is adapted for assisting in the detection and post event analysis of such events. The system is adapted for use in combination with a comprehensive multi-media safety and surveillance system, utilizing both visual and audio information as well as critical data to the flight crew, and to a ground tracking station, and recording the information and data generated during flight. A plurality of acoustic sensors are strategically and systematically placed about an airframe. The sensors are adapted for communicating with a monitor/recording system and may be hard wired or utilize wireless communications therewith. In the event of a catastrophic event, such as a bomb explosion, a gunshot or structural failure an acoustic event would be recorded for later analysis.

Claims

1. A wireless acoustic sensor and data generation system for providing in flight safety and surveillance for aircraft, the system comprising:

a. a plurality of acoustic sensors each adapted for monitoring a selected condition aboard the aircraft, each sensor adapted for generating a unique data signal representing the specific condition to be monitored at a specific location;

b. a collector adapted for collecting the plurality of sensors and generating therefrom a combined signal incorporating each of the plurality of signals into combined output signal; and

c. a processing system for receiving and processing the combined output signal, wherein said sensors are adapted for transmitting the data signal to the collector and processing svstem via wireless radio frequency transmission.

2. The system of claim 1, further including means for tracking the time each signal is generated.

3. The system of claim 1, further including means for tracking the navigational coordinates of the aircraft when each signal is generated.

4. The system of claim 1, the processing system further including a recorder for recording each of said signals, whereby the signals may be used for reconstructing the time and location of an acoustic event.

5. The system of claim 1, including a plurality of acoustic sensor devices each adapted for generating an audio signal, the collector further including a multiplexer subsystem for combining the plurality of acoustic signals into a combined acoustic.

6. The system of claim 5, wherein one of said acoustic signals is an analog signal and wherein one of said acoustic signals is a digital signal, the multiplexer further including an analog to digital converter for converting the analog signal into a converted digital signal, the multiplexer subsystem adapted for multiplexing the converted digital audio signal and the digital signal into a combined digital acoustic signal.

7. The system of claim 5, wherein one of said acoustic signals is an analog signal and wherein one of said acoustic signals is a digital signal, the multiplexer further including a digital to analog converter for converting the digital signal into a converted analog signal, the multiplexer subsystem adapted for multiplexing the converted analog signal and the analog signal into a combined analog acoustic signal.

8. The system of claim 1, wherein said combined signal includes specific, time sequenced interval segments of the plurality of data signals in a serial format.

9. The system of claim 1, wherein said combined signal includes the plurality of signals released simultaneously in a compressed, parallel format.

10. The system of claim 1, wherein the processing system further includes a recorder for capturing the output combined output signal in a retrievable format.

11. The system of claim 10, wherein the recorder is a single channel, analog recorder.

12. The system of claim 10, wherein the recorder is a digital random access memory device.

13. The system of claim 1, wherein the processing system further includes a transmitter adapted for wireless transmission of the combined output signal to a remote location, whereby the combined output signal may be downloaded from the system.

14. The system of claim 13, wherein the processing further includes a receiver adapted for receiving wireless transmission of data signals from a remote location, whereby a data signal may be uploaded onto the system from a remote location.

15. The system of claim 1, wherein each sensor includes a transmitter for generating a data signal to be transmitted and the collector and processing system includes a receiver device for accepting the transmitted data signal.

16. The system of claim 15, wherein each sensor includes a transmitter for generating a data signal on a unique frequency and wherein the receiver device comprises a frequency agile receiver adapted for maintaining the identity of each transmitted data signal.

17. The system of claim 16, wherein each sensor includes a transmitter for generating a data signal on a unique frequency and wherein the receiver device comprises a dedicated receiver for each of the plurality of transmitted data signals.

18. The system of claim 1, wherein each sensor further includes a self-contained power supply.

19. The system of claim 1, further including a global positioning system producing an output position signal adapted to be incorporated into the combined output signal.

20. The system of claim 1, the collector further includes a multiplexing system adapted for accepting a plurality of parallel data signals simultaneously and for generating therefrom a single, combination output signal.

21. The system of claim 20, wherein said combination output signal includes a plurality of the data signals combined in a serial, time interval repeat sequence.