Smoke detection by way of two spectrally different scattered light measurements

A device and a method for detecting smoke based on the principle of optical scattered light measurements are described. The device (100) described comprises a light emitting device (110), configured to issue a temporal succession of light pulses, wherein a first light pulse comprises a first spectra...

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Bibliographic Details
Main Authors TENCHIO GEORGES A, VOLLENWEIDER WALTER, MUELLER KURT, LOEPFE MARKUS
Format Patent
LanguageChinese
English
Published 19.01.2011
Subjects
ALARM SYSTEMS
ORDER TELEGRAPHS
PHYSICS
SIGNALLING
SIGNALLING OR CALLING SYSTEMS
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Summary:A device and a method for detecting smoke based on the principle of optical scattered light measurements are described. The device (100) described comprises a light emitting device (110), configured to issue a temporal succession of light pulses, wherein a first light pulse comprises a first spectral distribution and a second light pulse comprises a second spectral distribution different from the first spectral distribution. The device (100) further comprises a light receiver (120), configured to receive a first scattered light from the first light pulse and a second scattered light from the second light pulse, and configured to prepare a first output signal that is indicative for the first scattered light, and a second output signals that is indicative for the second scattered light. Also, the device (100) described comprises an evaluation unit that is configured to compare the first output signal with the second output signal. Preferably, the light emitting device (110) and the light receiver (120) are arra
Bibliography:Application Number: CN200980105644