Methods and systems for locating actuators for improvised explosive devices

• US 7,498,986 B2
• Filed: 12/05/2005
• Issued: 03/03/2009
• Est. Priority Date: 12/05/2005
• Status: Expired due to Fees

• Current Assignee: Honeywell International Inc.
• Original Assignee: Honeywell International Inc.
• Inventors: Thomas, Steven H.
• Primary Examiner(s): Tarcza; Thomas H
• Assistant Examiner(s): Nguyen; Nga X
• Application Number:
  US11/294,864
• Publication Number:
  US 20080129600A1
• Time in Patent Office: 1,184 Days
• Field of Search: 342/365, 342/464, 342/465, 342/14, 342/357.02
• US Class Current: 342/465
• CPC Class Codes: F41H 11/12 Means for clearing land minefields; Systems specially adapted for detection of landmines
• CPC Class Codes: F42D 1/045 Arrangements for electric ignition dynamo-electric generators H02K
• CPC Class Codes: G01S 2205/07 Military
• CPC Class Codes: G01S 5/02 using radio waves using satellite radio beacon systems for determining position G01S19/00
• CPC Class Codes: G01S 5/02213 Receivers arranged in a network for determining the position of a transmitter
• CPC Class Codes: G01S 5/04 Position of source determined by a plurality of spaced direction-finders
• CPC Class Codes: H04K 2203/24 for communication related to weapons
• CPC Class Codes: H04K 2203/34 involving multiple cooperating jammers
• CPC Class Codes: H04K 3/45 characterized by including monitoring of the target or target signal, e.g. in reactive jammers or follower jammers for example by means of an alternation of jamming phases and monitoring phases, called "look-through mode"
• CPC Class Codes: H04K 3/92 related to allowing or preventing remote control

Abstract

A method for determining the location of an actuating device is described. The method includes receiving transmissions from the actuator utilizing a plurality of multiple channel receiving devices, determining a direction to the actuator based on the signals received, and retrieving position, orientation, and time information for the plurality of multiple channel receiving devices relating to each transmission received from the actuator. Also included in the method is triangulating the position of the actuator based on the position, orientation, time, and determined direction to the actuator for the plurality of multiple channel receiving devices. Systems that perform the above method are also described.

Claims

1. A method for determining the location of an actuator, comprising:

providing a broadband jammer comprising;

a plurality of frequency generators each of which produce a frequency range that is different from others of the frequency generators;

one or more multiplexers configured to receive the frequency range from each of the frequency generators;

one or more power amplifiers configured to receive an output signal from the one or more multiplexers;

one or more filters configured to receive an output signal from the one or more amplifiers, the one or more filters having pass bands corresponding to the different frequency ranges;

receiving transmission signals from the actuator utilizing a plurality of multiple channel receiving devices coupled to the broadband jammer, the multiple channel receiving devices each tuned to one of the different frequency ranges, the multiple channel receiving devices each coupled to at least two antennas, wherein at least one of the antennas comprises a broadband antenna;

determining a direction to the actuator based on the transmission signals received;

retrieving position, orientation, and time information for the plurality of multiple channel receiving devices relating to each transmission signal received from the actuator; and

triangulating the position of the actuator based on the position, orientation, time, and determined direction to the actuator for the plurality of multiple channel receiving devices.

2. A method according to claim 1 wherein determining a direction to the actuator comprises utilizing a time difference of arrival of the actuator signal to each antenna of a multiple channel receiving device to determine a quadrant in which the actuator is located.

3. A method according to claim 1 wherein determining a direction to the actuator comprises determining a phase difference between the signals received at each antenna for each multiple channel receiving device.

4. A method according to claim 3 wherein determining a phase difference comprises utilizing a multiple channel receiving device which incorporates at least three antennas to provide unambiguous phase differences in the signals received at the antennas.

5. A method according to claim 1 wherein retrieving position, orientation, and time information comprises receiving at least one of GPS information and inertial measurement unit information.

6. A method according to claim 1 wherein receiving signals from the actuator comprises configuring the plurality of multiple channel receiving devices to receive signals in a plurality of frequency bands.

7. A method according to claim 1 further comprising:

determining characteristics of the transmission signals received; and

transmitting a signal configured to jam the signals transmitted by the actuator.

8. A method according to claim 1 wherein triangulating the position of the actuator based on the position, orientation, time, and determined direction to the actuator comprises transmitting position, orientation, time, and determined direction to the actuator to a command and control center.

9. A system for determining the location of an actuating device comprising:

a broadband jammer comprising;

a plurality of frequency generators each of which produce a frequency range that is different from others of the frequency generators;

one or more multiplexers configured to receive the frequency range from each of the frequency generators;

one or more power amplifiers configured to receive an output signal from the one or more multiplexers;

one or more filters configured to receive an output signal from the one or more amplifiers, the one or more filters having pass bands corresponding to the different frequency ranges;

a plurality of receivers each tuned to one of the different frequency ranges and comprising at least two channels;

at least two antennas coupled to each of the receivers and corresponding to each channel, said antennas of each said receiver separated by a distance, at least one of said antennas comprising a broadband antenna, each of said receivers separated by a distance, each said receiver configured to utilize signals received at each said antenna to determine a direction to the actuating device; and

a controller configured to receive the actuating device direction from each of said receivers, said controller further configured to receive position, orientation, and time information from a location of each of said receivers, said controller configured to determine a position of the actuating device, based on the direction to the actuating device and the position, orientation, and time information as determined for each said receiver.

10. A system according to claim 9 wherein to determine a direction to the actuating device, said receivers are programmed to utilize a time difference of arrival of an actuating device signal to each said antenna to determine a quadrant in which the actuating device is located.

11. A system according to claim 9 wherein said receivers are configured to determine a direction to the actuating device utilizing a phase difference between signals received at each said antenna.

12. A system according to claim 9 wherein at least one of said receivers comprises three said channels and corresponding said antennas, said three channel receiver configured to utilize the phase differences between the signals received at each respective said antennas to determine an unambiguous phase difference between the signals received by said antennas.

13. A system according to claim 9 further comprising an inertial measurement unit located in a proximity of each of said receivers, said inertial measurement unit configured to provide position and orientation information for a respective said receiver to said controller.

14. A system according to claim 9 further comprising a global positioning system located in a proximity of each of said receivers, said global positioning system configured to provide time information for a signal received by a respective said receiver to said controller.

15. A system according to claim 9 wherein said receivers are configured to receive and process signals in a plurality of frequency bands.

16. A system according to claim 9 wherein said system further comprises at least one transmitter, said receivers configured to determine the characteristics of transmission signals received from an actuating device and cause said at least one transmitter to transmit a signal configured to jam the signals received from the actuating device.

17. A system according to claim 9 wherein to determine a position of the actuating device, said controller is configured to triangulate the position of the actuating device based on a position and orientation of said receivers, a time each said receiver received a transmission from the actuating device, and a determined direction to the actuating device received from each said respective receiver.

18. A jamming device for determining a direction to an improvised explosive device (IED) actuator, said jamming device comprising:

a broadband jammer comprising;

a plurality of frequency generators each of which produce a frequency range that is different from others of the frequency generators;

one or more multiplexers configured to receive the frequency range from each of the frequency generators;

one or more power amplifiers configured to receive an output signal from the one or more multiplexers;

one or more filters configured to receive an output signal from the one or more amplifiers, the one or more filters having pass bands corresponding to the different frequency ranges;

a broadband antenna coupled to the one or more filters;

a plurality of receivers each tuned to one of the different frequency ranges, the receivers each comprising;

a first pre-amplifier configured to receive IED actuator signals from the broadband antenna;

a second pre-amplifier configured to receive IED actuator signals from a second antenna;

a first mixer coupled to the first pre-amplifier and configured to receive a frequency from a voltage controlled oscillator;

a second mixer coupled to the second pre-amplifier and configured to receive a frequency from the voltage controlled oscillator;

a first amplifier configured to receive an output signal from the first mixer;

a second amplifier configured to receive an output signal from the second mixer; and

a phase comparator configured to receive an output signal from each of the first and second amplifiers; and

a controller operatively coupled to the phase comparator, the controller configured to;

receive transmissions relating to the direction to the IED actuator;

receive transmissions relating to a position and orientation of the plurality of receivers and a time at which each receiver received signals from the IED actuator; and

determine a position of the IED actuator, based on a direction to the IED actuator and position, orientation, and time information received for each receiver providing the direction to the IED actuator.

19. A jamming device according to claim 18 wherein to determine a position of the IED actuator, said controller is configured to triangulate the position based on a plurality of received transmissions relating to the direction to the IED actuator and a plurality of received transmissions relating to a position of a receiver and the times at which the receiver received the signals from the IED actuator.