(19)
(11) EP 0 402 129 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
24.04.1991 Bulletin 1991/17

(43) Date of publication A2:
12.12.1990 Bulletin 1990/50

(21) Application number: 90306182.8

(22) Date of filing: 07.06.1990
(51) International Patent Classification (IPC)5: G07C 9/00, G08B 25/00
(84) Designated Contracting States:
AT BE CH DE DK ES FR GB IT LI NL SE

(30) Priority: 09.06.1989 CA 602350

(71) Applicant: Devoy, Ralph P
Scarborough, Ontario M1B 2P4 (CA)

(72) Inventor:
  • Devoy, Ralph P
    Scarborough, Ontario M1B 2P4 (CA)

(74) Representative: Cline, Roger Ledlie et al
EDWARD EVANS & CO. Chancery House 53-64 Chancery Lane
London WC2A 1SD
London WC2A 1SD (GB)


(56) References cited: : 
   
       


    (54) Location identification system


    (57) An identification system for identifying individuals within a facility and having a plurality of individual tags T to be carried on the person, each tag continuously emitting tag pulse rates unique to that tag at a predetermined frequency, at least one location detector unit placed at a monitor location, and having a signal processor unit 4, an antenna 1 to receive tag signals and a direction sensor 2 to generate a direction signal responsive to movement of an individual, so that the signal processor unit 4 will examine a tag signal only when a direction signal has been received from the direction sensor 2 and, a central processing unit 7 to communicate with each signal processing unit 4, and a method of detecting individuals in such a facility using such tags T and location detector units U.







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