Apparatus and methods for detecting and locating signals

• US 7,277,053 B2
• Filed: 09/08/2004
• Issued: 10/02/2007
• Est. Priority Date: 09/08/2004
• Status: Expired due to Fees

• Current Assignee: Lucid Dimensions LLC
• Original Assignee: Lucid Dimensions LLC
• Inventors: Riel, Ryan David, Calihman, Adam Ethan
• Primary Examiner(s): Tarcza; Thomas H.
• Assistant Examiner(s): Ly; Hien
• Application Number:
  US10/936,428
• Publication Number:
  US 20060049985A1
• Time in Patent Office: 1,119 Days
• Field of Search: 342/359, 342/368, 342/133, 342/354, 342/357, 342/422, 342/423, 342/445, 342/450, 342/438, 342/426, 342/403, 342/406, 342/121, 342/154, 342/742, 342/432, 342/386, 342/207.11, 342/207.15, 33/212, 432/121, 340/368.3, 250/233, 701/207, 345/167, 367/72
• US Class Current: 342/432
• CPC Class Codes: G01S 3/043 Receivers
• CPC Class Codes: G01S 3/28 using amplitude comparison of signals derived simultaneously from receiving antennas or antenna systems having differently-oriented directivity characteristics
• CPC Class Codes: G01S 3/42 the desired condition being maintained automatically
• CPC Class Codes: G01S 3/781 Details
• CPC Class Codes: G01S 3/783 using amplitude comparison of signals derived from static detectors or detector systems
• CPC Class Codes: G01S 3/801 Details G01S3/82, G01S3/84, G01S3/86 take precedence
• CPC Class Codes: G01S 3/8034 wherein the signals are derived simultaneously
• CPC Class Codes: G01S 5/12 by co-ordinating position lines of different shape, e.g. hyperbolic, circular, elliptical or radial
• CPC Class Codes: G01S 5/16 using electromagnetic waves other than radio waves
• CPC Class Codes: G01S 5/28 by co-ordinating position lines of different shape, e.g. hyperbolic, circular, elliptical or radial

Abstract

A discrete three-dimensional receiving element has multiple sensors scattered over its surface to detect and locate a signal. The sensors facing the signal detect the signal, and a boundary line is drawn between the sensor which detect the signal and those which don'"'"'t. The strength of signal may also be detected. A plane is drawn through the receiver element, and the direction of the signal is determined as generally perpendicular to the plane, in the direction of the sensors which are receiving the signal. Distance to the source may also be determined based on signal strength. The location of the signal source may be transmitted to a remote location, or the receiver may direct an electromagnetic beam toward the source to detect further information about the source.

Claims

1. A method for detecting and locating a signal using a discrete three dimensional receiving element having multiple sensors surrounding the receiving element, the method comprising the steps of:

detecting the signal with those sensors generally facing the signal;

determining a boundary line around the surface of the receiving element, the boundary line generally separating sensors detecting the signal from sensors not detecting the signal;

determining a plane through the receiving element based upon the boundary line;

determining the direction of the signal based upon the plane; and

transmitting data indicating the determined direction to a control system.

2. The method of claim 1 further including the steps of:

measuring the strength of the detected signal with the sensors;

computing the distance between the receiving element and a source of the signal based upon the measured signal strengths.

3. The method of claim 2 wherein the step of determining the boundary line is further based upon the measured signal strengths.

4. The method of claim 2, further comprising the step of generating a transmission based upon the determined direction and distance of the source of the signal.

5. The method of claim 4, wherein the step of generating a transmission comprises the step of transmitting the direction and distance of the source to a remote location.

6. The method of claim 4, wherein the step of generating a transmission comprises the step of directing an electromagnetic beam toward the source and detecting the electromagnetic beam impinging on the source.

7. The method of claim 6, wherein the electromagnetic beam reflects off of the source.

8. The method of claim 2 further including the step of rotating the receiving unit while the sensors are detecting the signal.

9. The method of claim 2 wherein the receiving unit has at least a portion of one of the following shapes:

sphere, ellipsoid, circular band, cone, prism, pyramid, cone.

10. The method of claim 2 wherein the receiving unit is spherical and the sensors are placed in bands encircling the receiving unit.

11. The method of claim 2 wherein the sensors detect one of the following types of signals:

radio frequency, microwave, infrared, visible light, ultraviolet, x-ray, gamma ray, radar, sonar, sound, particles, communication signals.

12. The method of claim 2, further comprising the step of detecting a second signal by finding a second boundary plane based upon regions of detected signal strength.

13. Apparatus for detecting and locating a signal comprising:

a discrete three dimensional receiving element, the receiving element being an insulator with respect to the signal;

multiple sensors surrounding the receiving element, wherein the sensors generally facing the signal detect the signal; and

a processor including

means for determining a boundary line around the surface of the receiving element, the boundary line generally separating sensors detecting the signal from sensors not detecting the signal,

means for determining a plane through the receiving element based upon the boundary line, and

means for determining the direction of the signal based upon the plane.

14. The apparatus of claim 13 wherein the sensors further measure the strength of the detected signal with the sensors and wherein the processor further includes means for computing the distance between the receiving element and a source of the signal based upon the measured signal strengths.

15. The apparatus of claim 14 wherein the means for determining the boundary line further utilizes the measured signal strengths.

16. The apparatus of claim 14, further comprising a transmitter for generating a transmission based upon the direction and distance to the source of the signal.

17. The apparatus of claim 16, wherein the transmitter transmits the direction and distance of the source to a remote location.

18. The apparatus of claim 17, wherein the transmitter transmits an electromagnetic beam toward the source, and further comprising a response detector for detecting a response based upon the electromagnetic beam impinging on the source.

19. The apparatus of claim 15 wherein the receiving element has at least a portion of one of the following shapes:

sphere, ellipsoid, circular band, cone, prism, pyramid.

20. The apparatus of claim 15 wherein the receiving unit is spherical and the sensors are placed in bands encircling the receiving unit.

21. The apparatus of claim 15 wherein the sensors detect one of the following types of signals:

radio frequency, microwave, infrared, visible light, ultraviolet, x-ray, gamma ray, radar, sonar, sound, particles, communication signals.