EP 0817146 B1 20020320 - Intrusion detection apparatus using leaky cables
Title (en)
Intrusion detection apparatus using leaky cables
Title (de)
Eindringungsdetektionsvorrichtung mit strahlenden Leitungen
Title (fr)
Dispositif pour la détection d'intrusions du type utilisant des câbles rayonnants
Publication
Application
Priority
FR 9608283 A 19960703
Abstract (en)
[origin: EP0817146A1] The radiating cable system has parallel metal tubes (1,2,3) spaced apart covering the required zone up to 100 m apart. A transmitter feeds power through a cable (4) to one metal tube (3). A second parallel metal tube (2) is earthed, and a third tube (1) connected to a receive cable (5). The cable is connected to a receiver. A calculator measures the transmit and received power and finds whether a field perturbation from the radiating field has produced an intruder detection.
IPC 1-7
IPC 8 full level
G08B 13/24 (2006.01)
CPC (source: EP)
G08B 13/2497 (2013.01)
Designated contracting state (EPC)
BE CH DE ES GB IT LI LU MC PT
DOCDB simple family (publication)
EP 0817146 A1 19980107; EP 0817146 B1 20020320; DE 69711123 D1 20020425; FR 2750782 A1 19980109; FR 2750782 B1 19981002
DOCDB simple family (application)
EP 97401544 A 19970701; DE 69711123 T 19970701; FR 9608283 A 19960703