Method and device for recognizing vibration signals, e.g. knocking of internal combustion engines

摘要

The method involves selecting required data on engine parameters from a mapped table. The data is passed to a decoder in a separate memory. The decoded data is sent to a second memory. A reference signal is generated for use as one input to a multiplier. A vibration detector signal is used as the other input to the multiplier. The multiplied signal is then rectified. The rectified signal is integrated. The integrator is then set to zero with a signal from the decoder. A presence or absence of the signal is determined based upon a comparison of the integrated signal with a given threshold.