Method and device for we shall now describe the presence and the energy of a database in a frequency noise, and a detection of pinging in an internal combustion engine

摘要

The invention relates to the detection, by spectral analysis, the presence and the energy of a given frequency (f) in a noise, which consists: in sampling the noise with a sampling frequency (fe); to perform a filtering anti - folded onto the sampled signal, and to process the signal sampled in the filtering with a digital filter and by evaluating, on the basis of a predetermined criterion, the presence and the energy of the said given frequency (f) the digital filtering is a high pass filtering - having a cut-off frequency (fc); the sampling frequency (fe) is double the given frequency (f); and the cut-off frequency of anti - folding is situated between the given frequency (f) and the sampling frequency (fe).