EP 0844596 A3 19991208 - Device for detecting an electronic tag in an interrogation area
Title (en)
Device for detecting an electronic tag in an interrogation area
Title (de)
Vorrichtung zur Überwachung eines elektronischen Sicherungselementes in einer Abfragezone
Title (fr)
Dispositif pour détecter une étiquette électronique dans une zone d'interrogation
Publication
Application
Priority
DE 19647905 A 19961120
Abstract (en)
[origin: EP0844596A2] The monitor has a transmitter (4) of a periodic interrogation signal which stimulates an electronic security element (2) to transmit an identity signal. A receiver (5) with at least one reception channel receives this identity signal and a computer and or control unit (7) evaluates the received identity signal. If the security element is identified the computer triggers an alarm. The control unit detects noise pulses in the individual reception channels if a received signal is present. The signal shapes of the noise pulses are determined using a self-learning process and subsequently eliminated from the received signal.
IPC 1-7
IPC 8 full level
G08B 13/24 (2006.01)
CPC (source: EP US)
G08B 13/2482 (2013.01 - EP US)
Citation (search report)
- [Y] US 5537094 A 19960716 - BETTINE DALE R [US], et al
- [Y] US 5402520 A 19950328 - SCHNITTA BONNIE S [US]
- [A] EP 0704829 A2 19960403 - SENSORMATIC ELECTRONICS CORP [US]
- [A] WO 9416421 A1 19940721 - CHECKPOINT SYSTEMS INC [US]
- [A] US 5442543 A 19950815 - TRESP VOLKER [DE]
- [A] US 5349339 A 19940920 - KIND BURCKART [CH]
- [A] US 4168496 A 19790918 - LICHTBLAU GEORGE J
- [A] US 4812822 A 19890314 - FELTZ JOHN F [US], et al
Designated contracting state (EPC)
AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
EP 0844596 A2 19980527; EP 0844596 A3 19991208; DE 19647905 A1 19980528; US 5969611 A 19991019
DOCDB simple family (application)
EP 97118492 A 19971024; DE 19647905 A 19961120; US 97487697 A 19971120