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

Claim 9:
10. 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 the rotational oscillation of the magnetic object with different excitation amplitudes, wherein the rotational oscillation induces the 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 i) an amount of change of the resonant frequency depending on the excitation amplitude of the exciting magnetic field and/or ii) a velocity of change of the resonant frequency depending on the excitation amplitude of the exciting magnetic field, based on the induction signal.