Patent ID: 8478556

Claim:
A machine implemented calibration process for a differential resonator type surface acoustic wave (SAW) sensor of a first model incorporated in an assembly, the SAW sensor having two resonance frequencies which vary differently as a function of the value of a physical magnitude of the assembly, the process: reading the first and second frequencies of the SAW sensor by a reader device; determining a difference between the two resonance frequencies of the SAW sensor when the physical magnitude corresponds to a predetermined value, by a processing device; determining the deviation of the SAW sensor relative to an averaged calibration function, in frequency or in terms of the difference between the value provided by the sensor and the predetermined value, by the processing device, the averaged calibration function being obtained by averaging over a plurality of SAW sensors of the first model; and determining a corrected value of the physical magnitude output by the SAW sensor, taking account of said deviation, by the processing device.