Method and system for authenticating a timepiece

摘要

Embodiments relate to method for authenticating timepiece comprising measuring acoustic vibrations emitted by timepiece to obtain electrical signal, which indicates variation of magnitude of measured acoustic vibrations as function of time. The method includes processing electrical signal to attenuate plurality of acoustic events in said electrical signal, performing transform of processed electrical signal into a frequency domain to obtain frequency-domain power spectrum indicating variation of power of processed electrical signal as a function of frequency, identifying at least one narrow peak in frequency-domain power spectrum corresponding to at least one resonance frequency of a part of timepiece resonating in a quiet zone. The method also includes extracting at least one resonance frequency corresponding to at least one narrow peak, comparing extracted at least one resonance frequency with at least one reference resonance frequency, and deriving information on an authenticity of said timepiece based on the comparing.

主权项

1. A method for authenticating a timepiece comprising:
measuring acoustic vibrations emitted by said timepiece to obtain an electrical signal, said electrical signal indicating a variation of a magnitude of said measured acoustic vibrations as a function of time, wherein said electrical signal comprises a plurality of acoustic events associated with mechanical shocks taking place in said timepiece, said acoustic events being separated from each other by respective quiet zones; processing said electrical signal so as to attenuate said plurality of acoustic events in said electrical signal; performing a transform of said processed electrical signal into a frequency domain to obtain a frequency-domain power spectrum indicating a variation of a power of said processed electrical signal as a function of frequency using a processor of a computing device; processing said frequency-domain power spectrum so as to identify at least one narrow peak in said frequency-domain power spectrum corresponding to at least one resonance frequency of a part of said timepiece resonating in a quiet zone; extracting said at least one resonance frequency corresponding to said at least one narrow peak; comparing said extracted at least one resonance frequency with at least one reference resonance frequency; and determining an authenticity of said timepiece based on the comparing.