Method for self-calibrating an alarm siren module for a vehicle

摘要

The method involves controlling instantaneous frequency of an electric control signal, and measuring electric parameters generated at level of a transducer. Extremum or measured parameters in predefined range of frequency values are detected to determine resonant frequency in siren for value ranges. Control parameters of the instantaneous frequency of electric control signal are modified so that the signals has constant frequency signal portion whose instantaneous frequency is equal to resonant frequency in siren or sub-multiple of resonant frequency.