EP 0940789 B1 20021023 - Method for fire detection
Title (en)
Method for fire detection
Title (de)
Verfahren zur Brandmeldung
Title (fr)
Procédé pour signaler un incendie
Publication
Application
Priority
DE 19809763 A 19980306
Abstract (en)
[origin: EP0940789A2] 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.
IPC 1-7
G08B 17/10; G08B 17/12; G08B 29/04; G08B 19/00; G08B 13/16; G08B 13/184
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