CONVOY-BASED SYSTEMS AND METHODS FOR LOCATING AN ACOUSTIC SOURCE

• US 20130107668A1
• Filed: 10/28/2011
• Published: 05/02/2013
• Est. Priority Date: 10/28/2011
• Status: Abandoned Application

• Current Assignee: Raytheon Company (Rtx Corporation)
• Original Assignee: Raytheon Company (Rtx Corporation)
• Inventors: Holyoak, Joel N., Culotta, Joseph Vincent Jr.
• Application Number:
  US13/283,997
• Publication Number:
  US 20130107668A1
• Time in Patent Office: Days
• US Class Current: 367/118
• CPC Class Codes: G01S 5/22 Position of source determined by co-ordinating a plurality of position lines defined by path-difference measurements G01S5/28 takes precedence

Abstract

A method of locating an acoustic source using a plurality of vehicles is provided. The method includes transferring acoustic input from a plurality of sensors to a plurality of processing modules, determining a location of each of the vehicles using at least one of a global positioning system module and an inertial motion unit module located in each vehicle, processing, at each processing module, the received acoustic input, designating one of the processing modules a master processing module, and sending processed acoustic input received at each processing module to the master processing module, combining the processed acoustic input at the master processing module, and estimating acoustic source location based on combined processed acoustic data. The method may further include determining if the master processing module is functional, and responsive to determining that the master processing module is not functional, designating a different one of the plurality of processing modules as the master processing module.

Claims

1. A method of locating an acoustic source using a plurality of vehicles, comprising:

transferring acoustic input from a plurality of sensors to a plurality of processing modules, wherein each of the plurality of sensors is coupled to one of the plurality of processing modules, and wherein each of the plurality of vehicles includes at least one of the plurality of sensors and one of the plurality of processing modules;

determining a location of each of the plurality of vehicles using at least one of a global positioning system module and an inertial motion unit module located in each vehicle;

processing, at each of the plurality of processing modules, the received acoustic input;

designating one of the plurality of processing modules a master processing module;

sending processed acoustic input received at each processing module to the master processing module;

combining the processed acoustic input at the master processing module; and

estimating acoustic source location based on combined processed acoustic data.

2. The method of claim 1, further comprising:

determining if the master processing module is functional, and

responsive to determining that the master processing module is not functional, designating a different one of the plurality of processing modules as the master processing module.

3. The method of claim 1, wherein processing includes processing, at each of the plurality of processing modules, location information for the corresponding one of the plurality of vehicles on which the respective processing module is positioned.

4. The method of claim 1, wherein each of the plurality of processing modules communicates with each of the other processing modules

5. The method of claim 4, further comprising selecting, at each processing module, a subset of the plurality of processing modules with which to communicate, based on processor network connectivity.

6. The method of claim 1, wherein processing the received acoustic input includes performing noise cancelation on the received acoustic input.

7. The method of claim 1, further comprising:

sending first processed acoustic input received at a first processing module of the plurality of processing modules to a second processing module of the plurality of processing modules; and

sending the first processed acoustic input from the second processing module to the master processing module.

8. The method of claim 1, wherein transferring acoustic input from the plurality of sensors includes transferring input from a plurality of arrays of sensor elements.

9. The method of claim 1, wherein estimating the acoustic source location includes calculating a minimum least squares estimate.

10. The method of claim 1, wherein estimating the acoustic source location includes comparing times of arrival of the acoustic input at each of the plurality of sensors.

11. The method of claim 1, wherein sending the processed acoustic input received at each processing module to the master processing module includes forming, with the plurality of vehicles, an interferometer base for acoustic detection.

12. A system for locating an acoustic source, comprising:

a plurality of sensors, including a first sensor positioned on a first vehicle and a second sensor positioned on a second vehicle;

a plurality of processing modules, including a first processing module positioned on the first vehicle and coupled to the first sensor and a second processing module positioned on the second vehicle and coupled to the second sensor;

a plurality of global positioning system modules, including a first global positioning system module positioned on the first vehicle, wherein the first global positioning system transmits vehicle location information to the first processing module

wherein the plurality of processing modules are connected in an ad hoc self-healing network such that each processing module of the plurality of processing modules is configured to receive data from the plurality of processing modules and process the data to determine the location of an event.

13. The system of claim 12, further comprising a plurality of inertial motion unit modules, including a first inertial motion unit module positioned on the first vehicle, wherein the first inertial motion unit transmits vehicle movement information to the first processing module.

14. The system of claim 12, wherein each of the plurality of sensors includes an array of sensor elements.

15. The system of claim 12, wherein each of the plurality of sensors is one of an acoustic sensor, an electro-optical sensor, an infrared sensor and a radar sensor.

16. The system of claim 12, further comprising a convoy of vehicles, wherein the first vehicle and the second vehicle are part of the convoy.

17. The system of claim 12, further comprising at least one noise cancelling node positioned on one of the first vehicle and the second vehicle.

18. The system of claim 12, wherein the first sensor is positioned on a first side of the first vehicle and a third sensor is positioned on a second side of the first vehicle, and the first and third sensors are positioned to maximize sound isolation between the first and third sensors.

19. The system of claim 12, wherein the first and second vehicles form an interferometer base for acoustic detection.