EP 0724245 B1 20000126 - Passive infra-red detector evaluating the spectrum of heat radiation emitted by an object
Title (en)
Passive infra-red detector evaluating the spectrum of heat radiation emitted by an object
Title (de)
Passiver Infrarot-Melder, der die von einem Objekt emittierte Wärmestrahlung spektral auswertet
Title (fr)
Détecteur passif à rayonnement infrarouge permettant l'évaluation du spectre émis par un objet
Publication
Application
Priority
DE 19502521 A 19950127
Abstract (en)
[origin: EP0724245A1] The sensor (3) breaks down the incident infrared radiation into four spectral channels for which corresp. wavelength-dependent electrical signals (A1-A4) are produced. These signals are filtered (4) and their amplitudes are evaluated (5) for presentation to a logic unit (6). The spectral fundamental patterns of emission characteristics of a variety of infrared sources are stored in the memory (7). The mean voltage amplitude over the entire wavelength range is used as a basis for comparison. If correspondence to the stored patterns lies within allowed limits, the source is identified and an alarm given.
IPC 1-7
IPC 8 full level
G01J 3/28 (2006.01); G08B 13/19 (2006.01)
CPC (source: EP)
G08B 13/19 (2013.01)
Designated contracting state (EPC)
AT DE NL
DOCDB simple family (publication)
EP 0724245 A1 19960731; EP 0724245 B1 20000126; AT E189330 T1 20000215; DE 19502521 A1 19960801; DE 59604261 D1 20000302
DOCDB simple family (application)
EP 96100813 A 19960120; AT 96100813 T 19960120; DE 19502521 A 19950127; DE 59604261 T 19960120