Global Patent Index - EP 2829803 A1

EP 2829803 A1 20150128 - Method of stabilizing gas burner combustion using Fast-Fourier-Transformation (FFT)

Title (en)

Method of stabilizing gas burner combustion using Fast-Fourier-Transformation (FFT)

Title (de)

Verfahren zur Stabilisierung der Verbrennung eines Gasbrenners mittels Fast-Fourier-Transformation (FFT)

Title (fr)

Procédé de stabilisation de la combustion d'un brûleur à gaz avec Fast-Fourier-Transformation (FFT)

Publication

EP 2829803 A1 20150128 (EN)

Application

EP 13177970 A 20130725

Priority

EP 13177970 A 20130725

Abstract (en)

Method for operating a gas burner (10) having an air fan (14), a gas valve (17), a gas duct (16), an electrical or electronic sensor (13) coupled to the gas duct and a controller (20). The defined mixing ratio of the gas/air mixture is controlled - by comparing an actual value of a signal provided by the sensor (13) with a nominal value and - by generating a control variable for the gas valve (17) on basis of the control deviation between the actual value and the nominal value, - wherein the signal provided by the sensor (13) is in addition used to determine if the combustion is stable or unstable by processing the time-based signal provided by the sensor (13) in such a way that: -- the time-based signal provided by the sensor (13) is sampled at a defined sampling rate, -- a Fast Fourier Transformation is applied to the samples of the time-based signal thereby generating a frequency-based signal, -- it is determined if the amplitude of the frequency-based signal within a defined frequency range is larger than a defined threshold, wherein --- stable combustion is determined when the amplitude of the frequency-based signal within the defined frequency range is lower than the defined threshold, and wherein --- unstable combustion is determined when the amplitude of the frequency-based signal within the defined frequency range is larger than the defined threshold.

IPC 8 full level

F23N 1/00 (2006.01); F23N 5/24 (2006.01); F23N 5/18 (2006.01)

CPC (source: EP)

F23N 1/005 (2013.01); F23N 5/245 (2013.01); F23N 2005/185 (2013.01); F23N 2223/06 (2020.01); F23N 2223/10 (2020.01)

Citation (applicant)

Citation (search report)

Designated contracting state (EPC)

AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

Designated extension state (EPC)

BA ME

DOCDB simple family (publication)

EP 2829803 A1 20150128; EP 2829803 B1 20170510

DOCDB simple family (application)

EP 13177970 A 20130725