Communications: electrical – Condition responsive indicating system – Specific condition
Reexamination Certificate
2005-02-15
2005-02-15
La, Anh V. (Department: 2636)
Communications: electrical
Condition responsive indicating system
Specific condition
C340S632000, C340S588000
Reexamination Certificate
active
06856252
ABSTRACT:
A method for detecting fires is proposed that serves to avoid false alarms, by providing that an alarm threshold is determined as a function of signal parameters derived from at least one sensor signal. False alarms are thus advantageously precluded. This is still further improved by setting up an alarm interval for which the alarm threshold must be exceeded, if an alarm is to be indicated. The alarm interval can also be determined adaptively as a function of the signal parameters. An upper threshold and a lower threshold are provided for the alarm interval and the alarm threshold, respectively, in order to build in a certain safety, so that the alarm threshold and alarm interval will not assume values that put a function of the fire detector at risk. It is also possible to use more sensor signals, in which case signal parameters can be generated by linking the sensor signals. As the fire detector, a scattered light smoke detector is preferably used, which is equipped with a labyrinth and a measurement chamber.
REFERENCES:
patent: 4195286 (1980-03-01), Galvin
patent: 4757303 (1988-07-01), Scheidweiler
patent: 4881060 (1989-11-01), Keen et al.
patent: 5084696 (1992-01-01), Guscott et al.
patent: 5369397 (1994-11-01), Wong
patent: 5477218 (1995-12-01), Manmoto et al.
patent: 5552763 (1996-09-01), Kirby
patent: 5592147 (1997-01-01), Wing
patent: 5691704 (1997-11-01), Wong
patent: 5831537 (1998-11-01), Marman
patent: 5966077 (1999-10-01), Wong
patent: 5969437 (1999-10-01), Foerster
patent: 198 39 047 (2000-01-01), None
patent: 0 721 175 (1996-07-01), None
Hensel Andreas
Oppelt Ulrich
Pfefferseder Anton
Siber Bernd
La Anh V.
Robert & Bosch GmbH
Striker Michael J.
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