Patent ID: 6933930

Claim:
A device for acquiring the position coordinates of a source of mechanical waves generated by an impact on the surface of a plate (PLQ) of finite dimensions comprising a set of acoustic sensors (PZT 00 to PZT 11 ) each formed of a pair of piezoelectric transducers (PZTa, PZTb) situated facing one another on either side of the plate, the device comprising processing means for determining the coordinates of the source by analyzing the difference in propagation times of the acoustic waves generated by the source to the various sensors, a device characterized in that, the processing means comprise in association with each sensor (PZT 00 to PZT 11 ) a respective electronic circuit comprising in cascade, means for digitizing the amplified signal around a predetermined frequency, and associated with means for limiting the digitization to a time window starting before the acoustic waves reach a sensor and ending after the acoustic waves have reached said sensor.