Method for analyzing the signals of a danger alarm system and danger alarm system for implementing said method
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
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Jan 4, 2000
Grant Date -
N/A
app pub date -
Sep 30, 1998
filing date -
Oct 4, 1996
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
In a method for frequency analysis of a signal of a hazard detector, wavelet transformation is combined with fuzzy logic analysis. In the transformation, based on orthonormal or semi-orthonormal wavelets, an original signal is fed to a multi-stage filter cascade of pairs of high-pass/low-pass filters. From the output of the high-pass filter, wavelet coefficients and values of the original signal, each filter stage produces an association function. The functions are normalized and analyzed further in accordance with fuzzy logic rules. The method is particularly suitable for analyzing signals from flame detectors, noise detectors and the like. As processor code for transformation and analysis is kept short, high speed and accuracy are achieved at low cost.
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