Patent ID: 11883248
Assignee: KONINKLIJKE PHILIPS N.V.
Field: Medical technology (Instruments)
Classification: CPC A  G | IPC A  G

Claim 7:
8. The identifying system of claim 1, wherein the excitation and induction signal coil system is configured to:
a) generate the magnetic field providing the magnetic torque for rotating the magnetic object of the passive medical identification device out of its equilibrium orientation with different amplitudes and exciting a rotational oscillation of the magnetic object with different excitation amplitudes, wherein the rotational oscillation induces a response magnetic field, and
b) transduce the response magnetic field into the induction signal, wherein the induction signal depends on the different excitation amplitudes, wherein the processor is configured to determine a dependency of a frequency of the induction signal on the excitation amplitude based on the induction signal, to adapt a dependency model, which is configured to model a dependency of the frequency of the induction signal on the excitation amplitude, to the determined dependency and to determine, as a zero excitation amplitude frequency, the frequency at which the adapted dependency model indicates a zero excitation amplitude.