CA2225638A1 - Method and apparatus for tracking and locating personnel - Google Patents

Method and apparatus for tracking and locating personnel

Info

Publication number
CA2225638A1
CA2225638A1 CA002225638A CA2225638A CA2225638A1 CA 2225638 A1 CA2225638 A1 CA 2225638A1 CA 002225638 A CA002225638 A CA 002225638A CA 2225638 A CA2225638 A CA 2225638A CA 2225638 A1 CA2225638 A1 CA 2225638A1
Authority
CA
Canada
Prior art keywords
sensors
person
values
received
locate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002225638A
Other languages
French (fr)
Other versions
CA2225638C (en
Inventor
Roger Christ
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
MAGAL-SENSTAR Inc
Original Assignee
Dominion Wireless Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dominion Wireless Inc filed Critical Dominion Wireless Inc
Publication of CA2225638A1 publication Critical patent/CA2225638A1/en
Application granted granted Critical
Publication of CA2225638C publication Critical patent/CA2225638C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C21/00—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00
    • G01C21/20—Instruments for performing navigational calculations
    • G01C21/206—Instruments for performing navigational calculations specially adapted for indoor navigation
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S1/00—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith
    • G01S1/02—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith using radio waves
    • G01S1/022—Means for monitoring or calibrating
    • G01S1/026—Means for monitoring or calibrating of associated receivers
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
    • G01S5/02—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using radio waves
    • G01S5/0252—Radio frequency fingerprinting
    • G01S5/02521—Radio frequency fingerprinting using a radio-map

Abstract

To locate a person within a particular room inside a building or, if outside, within a small enough radius that enables a rapid identification of where that person is located, a system of sensors is strategically disposed throughout the building or area. The sensors are calibrated so that upon activation of an alarm the feedback from all of the sensors enables differentiation of the location of the alarm. To locate an object within a defined area, received values output by the sensors are compared to stored reference values received by the sensors when transmitting reference signals. A best fit of the received values against the reference values is performed to determine the location of the person. To create the stored reference values, a calibration of the sensors is performed. This includes transmitting one at a time a plurality of reference signal levels, and measuring an output of each of the sensors after each transmission. One particularly noteworthy aspect of the present invention is that the sensors are coupled to a central computer via AC power lines in the facility in which the person is to be located. In this case, the AC power lines act as the physical interconnection layer of a local area network.
CA002225638A 1997-02-07 1998-02-06 Method and apparatus for tracking and locating personnel Expired - Lifetime CA2225638C (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US3803797P 1997-02-07 1997-02-07
US60/038,037 1997-02-07
US09/018,897 1998-02-05
US09/018,897 US5977913A (en) 1997-02-07 1998-02-05 Method and apparatus for tracking and locating personnel

Publications (2)

Publication Number Publication Date
CA2225638A1 true CA2225638A1 (en) 1998-08-07
CA2225638C CA2225638C (en) 2004-03-30

Family

ID=26691641

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002225638A Expired - Lifetime CA2225638C (en) 1997-02-07 1998-02-06 Method and apparatus for tracking and locating personnel

Country Status (2)

Country Link
US (1) US5977913A (en)
CA (1) CA2225638C (en)

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