Patent ID: 11862826
Assignee: VOLKSWAGEN AKTIENGESELLSCHAFT
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  G  Y | IPC G  H

Claim 7:
8. A data processing device comprising a storage medium on which a program is stored, which enables the data processing device to carry out a method for determining a compressive tensile force acting on a fuel cell stack, the method comprising:
exciting a vibration of a vibratable section of the at least one tensioning element;
detecting an acoustic signal emitted from the vibratable section of the at least one tensioning element;
determining a fundamental frequency of the detected acoustic signal; and
determining a tensile force acting on the vibratable section of the at least one tensioning element on the basis of the determined fundamental frequency, the length of the vibratable section, and the linear mass distribution of the at least one tensioning element.