Device for recognizing knocking noise comprises a first sensor for receiving a first signal and transferring to an evaluation unit and a second sensor arranged spatially displaced to the first sensor for receiving a second signal

摘要

Device for recognizing knocking noise comprises a first sensor (10) for receiving a first signal and transferring to an evaluation unit (2) and a second sensor (20) arranged spatially displaced to the first sensor for receiving a second signal. The evaluation unit comprises a correlation unit (50) which calculates a cross-correlation of both signals to locate a knocking noise site (30). Preferred Features: The evaluation unit comprises a band filter which filters the first and/or second signal in a first band region to produce a first filter signal.