Method and system for authenticating a timepiece
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United States of America Patent
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Mar 15, 2016
Grant Date -
Jan 16, 2014
app pub date -
Jul 12, 2013
filing date -
Jul 13, 2012
priority date (Note) -
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Abstract
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.
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