EP 0837432 B1 20020703 - Device for monitoring a security element in an interrogation area
Title (en)
Device for monitoring a security element in an interrogation area
Title (de)
Vorrichtung zur Überwachung eines elektronischen Sicherungselementes in einer Abfragezone
Title (fr)
Dispositif pour surveiller un élément de sécurité dans une zone d'interrogation
Publication
Application
Priority
DE 19642985 A 19961018
Abstract (en)
[origin: EP0837432A1] The device (1) consists of a transmitter (4) which transmits at least one periodic interrogation signal into an interrogation zone (3). The interrogation signal stimulates a security element (2) to transmit an identity signal which is received by a receiver (5). A computer/control unit (7) evaluates the received identity signal and triggers an alarm if the security element is identified. The computer/control unit evaluates the received identity signal wrt. its amplitude and phase, detects a noise signal contained in the received signal and frees the received signal from the noise signal.
IPC 1-7
IPC 8 full level
G08B 13/24 (2006.01)
CPC (source: EP US)
G08B 13/2471 (2013.01 - EP US); G08B 13/2482 (2013.01 - EP US)
Designated contracting state (EPC)
BE CH DE ES FI FR GB IT LI SE
DOCDB simple family (publication)
EP 0837432 A1 19980422; EP 0837432 B1 20020703; DE 19642985 A1 19980423; DE 59707635 D1 20020808; ES 2177874 T3 20021216; US 6064296 A 20000516
DOCDB simple family (application)
EP 97117104 A 19971002; DE 19642985 A 19961018; DE 59707635 T 19971002; ES 97117104 T 19971002; US 94002597 A 19970929