Method and apparatus for detecting and destroying intruders

• US 7,109,888 B2
• Filed: 10/09/2002
• Issued: 09/19/2006
• Est. Priority Date: 01/18/2002
• Status: Expired due to Fees

• Current Assignee: Alion Science and Technology Corporation
• Original Assignee: Alion Science and Technology Corporation
• Inventors: Gawrelski, Richard J., Iannotti, Joseph A.
• Primary Examiner(s): TWEEL JR, JOHN ALEXANDER
• Application Number:
  US10/267,703
• Publication Number:
  US 20030151509A1
• Time in Patent Office: 1,441 Days
• Field of Search: 340/935, 340/541, 340/548, 340/564, 340/596, 340/598, 340/666, 340/825.36, 340/825.49, 342/357.01, 342/459, 324/66, 324/67
• US Class Current: 340/935
• CPC Class Codes: G01S 17/04 Systems determining the presence of a target
• CPC Class Codes: G01S 7/4818 using optical fibres

Abstract

A method and apparatus employing an array of spaced detectors and a detection circuit to detect disturbance of first and second conductors and provide signals to a computer system to determine both the presence of the intruder and the direction of travel of the intruder. The velocity of the intruder'"'"'s travel may also be determined. When used with a destruction device to destroy an intruder such as an explosive shell, the lob time and the killing distance may also be calculated and used to fire the shell and to explode it at a position to destroy the intruder. Often the intruder is an armored vehicle or a tank. The conductors may be spaced in an array that has the appearance of a spider web. The conductors may be light weight conductive elastomeric conductors.

Claims

1. An apparatus for detecting an intruder comprising:

an array of spaced conductors for laying on the ground in a predetermined pattern;

an electrical detection circuit connected to the array of conductors to detect at least a first disturbance of a first conductor and a second disturbance of a second conductor in the array and to provide electrical signals;

a computing device connected to the electrical circuit to determine from electrical signals provided by the electrical detection circuit the location of the intruder, the direction of travel of the intruder, and the velocity of travel of the intruder.

2. An apparatus in accordance with claim 1 wherein the array of spaced conductors comprises:

conductors laid radially from a central axis to form at least a portion of the array.

3. An apparatus in accordance with claim 2 wherein the array of spaced conductors comprises:

a spider web form of array circumferentially extending conductors joined to the radially extending conductors.

4. An apparatus in accordance with claim 1 wherein the conductors comprise:

conductive elastomeric wires having an outer conductive tube and having an internal wire within the outer conductive tube being displacable by the intruder to cause a change in their electrical characteristics which is detected by the electrical detection circuit.

5. An apparatus in accordance with claim 1 wherein the conductors comprise:

fiber optic conductors; and

a device for providing an optical signal for the fiber optic conductors that has its characteristics changed with disturbance of the fiber optic conductors by the intruder.

6. An apparatus in accordance with claim 1 wherein the conductors comprise:

ultrasonic conductors having an ultrasonic sonic signal that is disturbed by the intruder.

7. An apparatus in accordance with claim 1 comprising:

a device for shooting an explosive at the intruder and using the information provided by the computing device as to the location, direction of travel and velocity of travel of the intruder to aim the explosive and to lead the explosive to hit the traveling intruder.

8. An apparatus in accordance with claim 1 wherein:

at least eight conductors are laid radially and extend a minimum distance of 20 meters.

9. An apparatus in accordance with claim 8 wherein:

at least twenty conductors are laid radially.

10. An apparatus in accordance with claim 1 wherein the conductors are laid radially and extend to provide a kill, sensing distance of at least twenty meters.

11. A method of detecting and destroying intruders comprising:

laying an array of spaced conductors on the ground in a predetermined pattern;

detecting an intrusion by the intruder which is disturbing first and second conductors in the array;

determining the direction of travel and velocity of travel of the intruder; and

firing an explosive at the intruder using the location, direction of travel, and velocity of the intruder at the time of detection to aim the explosive to destroy the intruder.

12. A method in accordance with claim 11 wherein the detecting the disturbance comprises:

providing an electrical circuit connected to the spaced conductors and detecting a change in characteristics of the electrical detection circuit due the disturbance of the conductors by the intruder.

13. A method in accordance with claim 12 comprising:

providing conductive elastomeric wires as the conductors; and

displacing an outer conductive tube on the elastomeric wires to cause a change in the electrical detection circuit.

14. A method in accordance with claim 12 comprising:

providing fiber optic conductors in the array; and

disturbance of the optic fiber causing change in the electrical characteristics of the electrical detection circuit.

15. A method in accordance with claim 12 comprising:

providing an optical signal in the fiber optic conductors that changes upon disturbance of the fiber optic conductors in the array.

16. A method in accordance with claim 11 comprising:

laying the spaced conductors radially from the central point on the ground to form an array having radially extending conductors.

17. A method in accordance with claim 16 comprising:

laying a spider web array of conductors on the ground to detect intruders.

18. A method in accordance with claim 11 comprising:

detecting intrusion by a motor driven vehicle and calculating the location, speed of travel and direction of travel of the vehicle; and

determining the lob time of the explosive in the air to meet the intruder as it continues to presumably travel in the same direction and at the same speed.