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1. (WO1991017515) TRANSPONDER SYSTEM
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1991/017515 International Application No.: PCT/CA1991/000147
Publication Date: 14.11.1991 International Filing Date: 01.05.1991
Chapter 2 Demand Filed: 04.11.1991
IPC:
G06K 7/00 (2006.01) ,G06K 19/07 (2006.01) ,G07C 9/00 (2006.01)
G PHYSICS
06
COMPUTING; CALCULATING; COUNTING
K
RECOGNITION OF DATA; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
7
Methods or arrangements for sensing record carriers
G PHYSICS
06
COMPUTING; CALCULATING; COUNTING
K
RECOGNITION OF DATA; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
19
Record carriers for use with machines and with at least a part designed to carry digital markings
06
characterised by the kind of the digital marking, e.g. shape, nature, code
067
Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards
07
with integrated circuit chips
G PHYSICS
07
CHECKING-DEVICES
C
TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS, OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
9
Individual entry or exit registers
Applicants:
DISYS INC. [CA/CA]; 711 Clayson Road Toronto, Ontario M9M 2H4, CA (AllExceptUS)
HOOK, Christopher, Derek [GB/GB]; GB (UsOnly)
HALL, Christopher, Stuart [GB/GB]; GB (UsOnly)
Inventors:
HOOK, Christopher, Derek; GB
HALL, Christopher, Stuart; GB
Agent:
SIM & McBURNEY; 330 University Avenue Suite 701 Toronto, Ontario M5G 1R7, CA
Priority Data:
9009739.501.05.1990GB
Title (EN) TRANSPONDER SYSTEM
(FR) SYSTEME DE TRANSPONDEUR
Abstract:
(EN) An electronic identification system comprising a transmitter (5) for generating an electromagnetic excitation signal, one or more portable transponders (3) for storing variable identification data, and for transmitting an information signal containing the identification data upon entering the field. Transmission of the information signal is independent of the excitation signal in both time and frequency. A radio frequency receiver is provided for receiving the information signal and in response generating an output signal representing the variable identification data contained in the information signal. THe system overcomes two principle disadvantages associated with existing systems: an excitation frequency can be selected for optimum performance given circumstances dictated by each application; an independent response channel can be selected according to the requirements of each installation or application, thereby allowing response signals to be transmitted by transponders at a frequency which differs from the frequency of an interfering signal.
(FR) Un système d'identification électronique comprend un émetteur (5) pour produire un signal d'excitation électromagnétique, un ou plusieurs transpondeurs portables (3) pour mémoriser des données d'identification variables et pour émettre un signal d'information contenant les données d'identification lorsqu'il(s) pénètre(nt) dans le champ. L'émission du signal d'information est indépendante du signal d'excitation à la fois en ce qui concerne le temps et la fréquence. Un récepteur de fréquence radio est compris pour recevoir le signal d'information et produire en réponse un signal de sortie représentant les données d'identification variables comprises dans le signal d'information. Le système surmonte deux désavantages principaux associés aux systèmes existants: une fréquence d'excitation peut être choisie pour une performance optimale dans des circonstances données dictées par chaque application; un canal de réponse indépendant peut être choisi selon les besoins de chaque installation ou application, permettant ainsi aux signaux de réponse d'être émis par des transpondeurs à une fréquence différente de la fréquence d'un signal d'interférence.
Designated States: AT, AU, BB, BG, BR, CA, CH, DE, DK, ES, FI, GB, HU, JP, KP, KR, LK, LU, MC, MG, MW, NL, NO, PL, RO, SD, SE, SU, US
European Patent Office (AT, BE, CH, DE, DK, ES, FR, GB, GR, IT, LU, NL, SE)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, ML, MR, SN, TD, TG)
Publication Language: English (EN)
Filing Language: English (EN)
Also published as:
EP0527172US5450492CA2081752DE000069108721AU1991077767