EP 2093733 B1 20110427 - Smoke detection through two spectrally different light scattering measurements
Title (en)
Smoke detection through two spectrally different light scattering measurements
Title (de)
Rauchdetektion mittels zweier spektral unterschiedlicher Streulichtmessungen
Title (fr)
Détection de fumée à l'aide de deux mesures à lumière diffusée spectrales différentes
Publication
Application
Priority
EP 08101742 A 20080219
Abstract (en)
[origin: EP2093733A1] The device (100) has an LED (110) emitting temporal sequence of light pulses, where one of the light pulses includes spectral distribution and another light pulse includes another spectral distribution different from the former spectral distribution. A light receiver (120) receives a set of scattered lights from the light pulses, and prepares a set of output signals that are indicative for the scattered lights. An evaluation unit compares one of the output signals with another output signal. The LED and light receiver are arranged directly adjacent to one another. An independent claim is also included for a method for detecting smoke on the basis of optical scattered light measurement.
IPC 8 full level
G08B 29/04 (2006.01)
CPC (source: EP US)
G08B 17/107 (2013.01 - EP US); G08B 29/043 (2013.01 - EP US); G08B 17/113 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR
DOCDB simple family (publication)
EP 2093733 A1 20090826; EP 2093733 B1 20110427; AT E507544 T1 20110515; CN 101952863 A 20110119; CN 101952863 B 20200424; DE 502008003347 D1 20110609; US 2011037971 A1 20110217; WO 2009103668 A1 20090827
DOCDB simple family (application)
EP 08101742 A 20080219; AT 08101742 T 20080219; CN 200980105644 A 20090216; DE 502008003347 T 20080219; EP 2009051756 W 20090216; US 73584609 A 20090216