EP 0715744 B1 19971203 - METHOD AND APPARATUS FOR PREVENTING FALSE RESPONSES IN OPTICAL DETECTION DEVICES
Title (en)
METHOD AND APPARATUS FOR PREVENTING FALSE RESPONSES IN OPTICAL DETECTION DEVICES
Title (de)
VERFAHREN UND VORRICHTUNG ZUR VERMEIDUNG VON FALSCHMELDUNGEN IN OPTISCHEN DETEKTORANORDNUNGEN
Title (fr)
PROCEDE DE PREVENTION DES REPONSES ERRONEES DE SYSTEMES OPTIQUES DE DETECTION, ET APPAREIL ASSOCIE
Publication
Application
Priority
- EP 94925486 A 19940830
- EP 9402888 W 19940830
- EP 93306865 A 19930831
Abstract (en)
[origin: WO9506927A1] A method and apparatus for preventing the occurrence of false responses in optical detection devices, which are sensitive to changes or fluctuations in optical radiation emitted from a source. The following steps are carried out: a) receiving optical radiation emitted by a source; b) selecting a predetermined range of wavelengths; c) detecting changes in the received optical flux and deriving therefrom a signal having time series data (signal traces) at the detector output; d) analyzing the detected signal for its chaotic (i.e. aperiodic) behaviour by establishing the associated fractal dimension of the signal and using the existence of this fractal property of the said time series data of the optical radiation emitted by the said source to discriminate against those sources of fluctuating optical radiation which are periodic or intermittent; and e) only providing a response at the output of the optical detection device in case of chaotic behaviour of the source.
IPC 1-7
IPC 8 full level
G08B 17/12 (2006.01)
CPC (source: EP)
G08B 17/12 (2013.01)
Designated contracting state (EPC)
DE DK FR GB IT NL SE
DOCDB simple family (publication)
WO 9506927 A1 19950309; AU 7537594 A 19950322; CA 2170519 A1 19950309; DE 69407190 D1 19980115; DE 69407190 T2 19980520; DK 0715744 T3 19980810; EP 0715744 A1 19960612; EP 0715744 B1 19971203; NO 960783 D0 19960227; NO 960783 L 19960312; SG 97742 A1 20030820
DOCDB simple family (application)
EP 9402888 W 19940830; AU 7537594 A 19940830; CA 2170519 A 19940830; DE 69407190 T 19940830; DK 94925486 T 19940830; EP 94925486 A 19940830; NO 960783 A 19960227; SG 1996006075 A 19940830