Infra-red intruder detection system

An infra-red intruder detection system has two separate channels A and B each having its own pyroelectric detector device (10A, 10B) and threshold level comparators (22A, 23A, 22B, 23B) responsive to dual polarity pyroelectric voltage outputs produced by the associated detector device as a result of...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	ROSE, MICHAEL ANDREW, KIDSON, PAUL
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	ALARM SYSTEMS ORDER TELEGRAPHS PHYSICS SIGNALLING SIGNALLING OR CALLING SYSTEMS
Online-Zugang:	Volltext bestellen
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