Patent ID: 11931818
Assignee: LISA DRÄXLMAIER GMBH
Field: Measurement (Instruments)
Classification: CPC B  G | IPC B  G

Claim 15:
16. An ultrasonic welding system comprising:
a sonotrode for applying a mechanical force to a workpiece;
a cable packet inserted into the sonotrode;
a piezo actuator configured to convert an electrical control signal into a mechanical vibration and to transmit the mechanical vibration to the sonotrode;
an ultrasound generator configured to provide the electrical control signal; and
a measuring device configured to:
detect a measurement value over a period, wherein the measurement value is characteristic of a mechanical or electrical vibration behavior of a welding process to be tested;
evaluate the detected measurement value by using a Fourier analysis; and
compare a result of the evaluation to a reference value in order to test the quality of the weld.