Method and Device for Detecting the Location of a Pulse-Type Mechanical Effect on a System Part

A device for detecting a location of a pulse-type mechanical effect on a system part, the device comprising:

• a plurality of sensors disposed on the system part, for continuously detecting and measuring an operating noise present in the system part;
• at least one A/D converter, connected downstream of said sensors, for digitizing measurement signals detected by said sensors;
• and
• an arithmetic unit connected to and receiving the digitized measurement signals from said A/D converter, said arithmetic unit programmed to:
• store the measurement signals respectively in time intervals for a time range;
• determine a first magnitude of a transform of each of the measurement signals with an aid of said of prescribed first parameters of a mathematical transformation rule in first time windows that are temporally sequential in first time steps and lie within the time range;
• derive a first evaluation function respectively for each of the first time step from the first magnitude determined for each of the prescribed first parameters resulting in first evaluation functions;
• compare the first evaluation functions respectively with a first threshold value, and an overshooting of the first threshold value by at least one of the first evaluation functions at a triggering instant is valued as an index for a presence of a pulse-type signal component indicating the mechanical effect;
• determine second evaluation functions with an aid of prescribed second parameters of the mathematical transformation rule and with the same algorithms in second time windows that are temporally sequential in second time steps and lie within the time range, and which are smaller than the first time windows;
• and
• determine the location of an effect from instants at which the second evaluation functions respectively fulfill a prescribed criterion, and from propagation time differences resulting therefrom.