The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 05, 2019
Filed:
May. 03, 2017
Siemens Schweiz Ag, Zürich, CH;
Martin Fischer, Bülach, CH;
Thomas Rohrer, Sachseln, CH;
SIEMENS SCHWEIZ AG, Zurich, CH;
Abstract
Various embodiments may include fire detector comprising: a fire sensor generating a signal corresponding to a characteristic fire parameter; a control unit; and a photodiode for detecting ambient light in a spectrally delimited range of 400 nm to 1150 nm. The control unit analyzes the signal and generates a fire alarm if the signal corresponds to a predetermined threshold for a fire. The control unit analyzes a photo-signal received from the photodiode and if the flicker frequencies characteristic of open fire are detected, the control unit increases a sampling rate for acquiring the sensor signal from the fire sensor by reducing a filter time of an evaluation filter for the fire analysis and/or by lowering an alerting threshold.