EP 0448290 A2 19910925 - Intrusion detection system and signal processing circuitry therefor.
Title (en)
Intrusion detection system and signal processing circuitry therefor.
Title (de)
Eindringmeldeanlage und Schaltungsanordnung zur Signalverarbeitung hierfür.
Title (fr)
Système de détection d'intrusion et circuit de traitement du signal pour un tel système.
Publication
Application
Priority
GB 9005751 A 19900314
Abstract (en)
An intrusion sensor apparatus comprises a microphonic cable and signal processing circuitry for monitoring the output of the cable to signal an attempted intrusion. The signal processing circuit comprises a number of parallel signal processing channels each adapted to respond to characteristics of the output of the cable indicative of the type of mechanical stimulation of the cable which correlates with the type of intrusion. The characteristics to which the channels respond are the time dependent behaviour of parts of the frequency spectrum of the cable output. <IMAGE>
IPC 1-7
IPC 8 full level
G08B 13/16 (2006.01)
CPC (source: EP)
G08B 13/169 (2013.01)
Designated contracting state (EPC)
AT BE CH DE DK ES FR GR IT LI LU NL SE
DOCDB simple family (publication)
EP 0448290 A2 19910925; EP 0448290 A3 19920930; GB 2242745 A 19911009; GB 9005751 D0 19900509; GB 9105419 D0 19910501
DOCDB simple family (application)
EP 91302176 A 19910314; GB 9005751 A 19900314; GB 9105419 A 19910314