Global Patent Index - EP 0724245 B1

EP 0724245 B1 2000-01-26 - 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 (DE)

Application

EP 96100813 A

Priority

DE 19502521 A

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

G08B 13/19 (2006.01)

CPC

G08B 13/19 (2013.01)

Designated contracting state (EPC)

AT DE NL

DOCDB simple family

EP 0724245 A1 19960731; EP 0724245 B1 20000126; AT 189330 T 20000215; DE 19502521 A1 19960801