EP 0940789 A2 19990908 - Method and sensor for fire detection
Title (en)
Method and sensor for fire detection
Title (de)
Verfahren und Sensor zur Brandmeldung
Title (fr)
Procédé et capteur pour signaler un incendie
Publication
Application
Priority
DE 19809763 A 19980306
Abstract (en)
The fire alarm method involves transmission of ultrasound signals from one transmitter and microwave- or optical- signals, or a combination of all three different wave-types from an additional transmitter. Doppler signals reflected from objects are received by receivers assigned to the transmitters, and the received signals are evaluated separately and in combination, so that a varied reception signal is detected for one type of wave, in the case that a reception signal for one or more other types of wave shows no movement, smoke, particles or variation in the gas composition in the detection zone.
Abstract (de)
Ein kombinierter Sensor zur Brandmeldung beinhaltet Sende/Empfangs-Einheiten für Ultraschall und entweder Mikrowelle oder Licht oder für sämtliche Wellenarten. Das Verfahren zur Auswertung verarbeitet die reflektierten und empfangenen Signale so, daß für den Fall eines veränderten Ultraschall-Empfangssignales eine Branddetektion vorliegt, wenn nicht gleichzeitig bei einer weiteren Wellenart eine Bewegung registriert wird. <IMAGE>
IPC 1-7
IPC 8 full level
G08B 13/16 (2006.01); G08B 13/184 (2006.01); G08B 17/10 (2006.01); G08B 17/12 (2006.01); G08B 19/00 (2006.01); G08B 29/04 (2006.01); G08B 29/18 (2006.01)
CPC (source: EP)
G08B 17/10 (2013.01); G08B 29/183 (2013.01); G08B 29/186 (2013.01)
Designated contracting state (EPC)
AT BE CH DE ES FR GB IT LI NL SE
DOCDB simple family (publication)
EP 0940789 A2 19990908; EP 0940789 A3 20000816; EP 0940789 B1 20021023; AT E226747 T1 20021115; DE 19809763 A1 19991202; DE 59903134 D1 20021128; ES 2186261 T3 20030501
DOCDB simple family (application)
EP 99103015 A 19990215; AT 99103015 T 19990215; DE 19809763 A 19980306; DE 59903134 T 19990215; ES 99103015 T 19990215