Global Patent Index - EP 0724245 B1

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

EP 0724245 B1 20000126 (DE)

Application

EP 96100813 A 19960120

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

G08B 13/19; G01J 3/28

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