Real-time, two dimensional (2-D) tracking of first responders with identification inside premises

• US 9,383,426 B2
• Filed: 10/31/2013
• Issued: 07/05/2016
• Est. Priority Date: 09/17/2013
• Status: Active Grant

• Current Assignee: Farrokh Mohamadi
• Original Assignee: Farrokh Mohamadi
• Inventors: Mohamadi, Farrokh
• Primary Examiner(s): Bythrow, Peter
• Application Number:
  US14/069,237
• Publication Number:
  US 20150077282A1
• Time in Patent Office: 978 Days
• Field of Search: 342/27, 342/28, 342 42- 51, 342/176, 342/179
• US Class Current: 1/1
• CPC Class Codes: G01S 1/02 using radio waves G01S19/00 takes precedence
• CPC Class Codes: G01S 13/0209 Systems with very large relative bandwidth, i.e. larger than 10 %, e.g. baseband, pulse, carrier-free, ultrawideband
• CPC Class Codes: G01S 13/04 Systems determining presence of a target based on relative movement of target G01S13/56
• CPC Class Codes: G01S 13/56 for presence detection presence detection using near field arrangements G01V3/00, e.g. G01V3/08, G01V3/12; burglar, theft or intruder alarms with electrical actuation G08B13/22 - G08B13/26
• CPC Class Codes: G01S 13/74 Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems
• CPC Class Codes: G01S 13/78 discriminating between different kinds of targets, e.g. IFF-radar, i.e. identification of friend or foe G01S13/75, G01S13/79 take precedence
• CPC Class Codes: G01S 13/888 through wall detection
• CPC Class Codes: G01S 19/13 Receivers
• CPC Class Codes: G01S 5/10 Position of receiver fixed by co-ordinating a plurality of position lines defined by path-difference measurements , e.g. omega or decca systemsG01S5/12 takes precedence ; beacons and receivers cooperating therewith G01S1/306, G01S1/308
• CPC Class Codes: G01S 5/14 Determining absolute distances from a plurality of spaced points of known location
• CPC Class Codes: G01S 7/415 Identification of targets based on measurements of movement associated with the target

Abstract

A combination of active reader tags and ultra wideband (UWB) radar systems provide real-time monitoring of first responders, with identification of each team member using active tags, and detection of victims or other subjects using motion or breathing detection, in a field of operations such as a building affected by fire or hazardous material or search and rescue mission area. Initially, a cluster of miniaturized radars (sensors) act in a static mode of operation, gathering static radar information used to depict a constructed layout of the premises. The cluster of radars then operate in a dynamic mode that detects motion or breathing of multiple subjects inside the field of operations. With dual mode operation the system can read the active tags identification, and by triangulation, display the position of each first responder with its identification and positions of subjects on a composite image of the constructed layout.

Claims

1. A system comprising:

a plurality of active tags, each active tag having an identification;

a plurality of wearable communicator units in communication with each other, each wearable communicator unit associated with one of the plurality of active tags, and each wearable communicator unit comprising a display; and

a plurality of sensor units comprising an ultra-wideband (UWB) radar imaging system, wherein each of the plurality of sensor units is in communication with at least one of the plurality of wearable communicator units, and wherein the plurality of sensor units is configured to;

operate in a static mode that gathers information to depict a layout of a field of operations;

communicate a layout depiction to at least one of the plurality of wearable communicator units;

operate in a dynamic mode that searches for motion of a subject using edge detection based on a depth resolution of about 3 picoseconds of the UWB radar imaging system, reads at least one of the active tags associated with at least one of the plurality of wearable communicator units, and locates a position of the at least one wearable communicator unit; and

communicate a position of the subject and the position of the at least one wearable communicator unit on the layout depiction to the at least one wearable communicator unit, wherein

the at least one wearable communicator unit displays the layout depiction, a subject location on the layout depiction, a wearable communicator unit location on the layout depiction, and active tag identification information on a display of the at least one wearable communicator unit.

2. The system of claim 1, wherein:

the ultra-wideband (UWB) radar imaging system is configured to detect obstructions and configured to detect the subject.

3. The system of claim 1, wherein each of the plurality of sensor units further comprises:

an active tag reader configured to read any of the active tags associated with one of the plurality of wearable communicator units.

4. The system of claim 1, wherein wherein each of the plurality of sensor units is configured to locate a precise position of each wearable communicator unit using triangulation from the known positions of the plurality of sensor units.

5. The system of claim 1, wherein:

the ultra-wideband (UWB) radar imaging system is configured to detect movement and breathing of the subject.

6. The system of claim 1, wherein at least one of the plurality of sensor units further comprises:

a locator processing unit, wherein each wearable communicator unit includes a display of grid location relative to a grid computed by the locator processing unit.

7. The system of claim 1, further comprising:

a global positioning system (GPS) unit included in each of the plurality of sensor units and configured to provide location information for each sensor unit; and

a GPS unit included in each of the plurality of wearable communicator units and configured to provide location information for each wearable communicator unit.

8. The system of claim 1, wherein the display of the layout depiction, and subject and communicator location and active tag identification information includes:

graphical information identifying the locations of communicator units;

graphical information identifying the locations of subjects; and

a two dimensional display of the locations of communicator units and subjects mapped on the layout information in real-time.

9. The system of claim 1, wherein each of the plurality of sensor units further comprises:

an ultra-wideband (UWB) radar imaging system; and

the UWB radar imaging system includes a wafer scale beam forming antenna array wherein the maximum dimension of the antenna array is less than 5 inches.

10. A method comprising:

communicating among a plurality of team members using a plurality of wearable communicator units wherein each of the plurality of team members is provided one of the plurality of wearable communicator units;

providing an active tag in proximity to each wearable communicator unit for each team member wherein each active tag has an identification;

positioning a plurality of sensor units, comprising an ultra-wideband (UWB) radar imaging system, about a field of operations, and wherein the sensor units are configured to communicate with the plurality of wearable communicator units;

operating the plurality of sensor units in a static mode that gathers information to depict a layout of the field of operations;

communicating a depiction of the layout to at least one of the plurality of wearable communicator units;

operating the plurality of sensor units in a dynamic mode that searches for motion of a subject using edge detection based on a depth resolution of about 3 picoseconds of the UWB radar imaging system, and reads an active tag of each wearable communicator unit;

locating a position of the subject and a position of the at least one wearable communicator unit;

communicating the subject position and the position of the at least one wearable communicator unit on the layout depiction to the at least one wearable communicator unit; and

displaying, on a display of the at least one wearable communicator unit, the layout depiction, the subject position on the layout depiction, and the position of the at least one wearable communicator unit on the layout depiction.

11. The method of claim 10, further comprising:

detecting obstructions using the ultra-wideband (UWB) radar imaging system.

12. The method of claim 10, further comprising:

reading at least one of the active tags with an active tag reader provided to at least one of the plurality of wearable communicator units.

13. The method of claim 10, further comprising:

locating a position of at least one wearable communicator unit by performing triangulation from the positions of the plurality of sensor units.

14. The method of claim 10, further comprising:

detecting movement and breathing of the subject using the ultra-wideband (UWB) radar imaging system.

15. The method of claim 10, further comprising:

displaying on the display of the at least one wearable communicator unit a grid location of each active tag relative to a grid computed by a locator processing unit included in at least one of the plurality of sensor units and communicated to the at least one wearable communicator unit.

16. The method of claim 10, further comprising:

acquiring location information for each sensor unit from a global positioning system (GPS) unit included in each of the plurality of sensor units; and

providing location information for each wearable communicator unit from a GPS unit included in each of the plurality of wearable communicator units.

17. The method of claim 10, further comprising:

including in the display of the layout depiction;

graphical information identifying the locations of the plurality of wearable communicator units;

graphical information identifying the location of the subject; and

a two dimensional display of the locations of the plurality of wearable communicator units and the subject mapped on the layout depiction in real-time.

18. The method of claim 10, further comprising:

forming a UWB radar beam, by the UWB radar imaging system, using a wafer scale beam forming antenna array wherein the maximum dimension of the antenna array is less than 5 inches.