High temperature product identification system and method
First Claim
Patent Images
1. An object identification system, comprising:
- a mechanical resonator configured to vibrate at one or more resonant vibration frequencies upon excitation thereof with an electromagnetic field; and
a sensor circuit including at least a portion thereof that is disposed adjacent the mechanical resonator, the sensor circuit operable to supply (i) the electromagnetic field to excite the mechanical resonator and (ii) a sensor signal that is modulated based on the one or more resonant vibration frequencies of the mechanical resonator.
1 Assignment
0 Petitions
Accused Products
Abstract
An object identification system and method includes a mechanical resonator that is configured to vibrate at one or more resonant vibration frequencies upon being excited with an electromagnetic field. A sensor circuit supplies the electromagnetic field to excite the mechanical resonator and a sensor signal that is modulated based on the one or more resonant vibration frequencies of the mechanical resonator. The modulated sensor signal is demodulated and analyzed to determine the resonant vibration frequencies of the resonator, which uniquely identify the resonator.
18 Citations
20 Claims
-
1. An object identification system, comprising:
-
a mechanical resonator configured to vibrate at one or more resonant vibration frequencies upon excitation thereof with an electromagnetic field; and
a sensor circuit including at least a portion thereof that is disposed adjacent the mechanical resonator, the sensor circuit operable to supply (i) the electromagnetic field to excite the mechanical resonator and (ii) a sensor signal that is modulated based on the one or more resonant vibration frequencies of the mechanical resonator. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
-
-
14. An object identification system, comprising:
-
a mechanical resonator having a plurality of cantilevered tines coupled to and extending from a main body, each of the cantilevered tines configured to vibrate, upon excitation thereof with an electromagnetic field, at a resonant vibration frequency that differs from the resonant vibration frequency of another cantilevered tine; and
a sensor circuit including at least a portion thereof that is disposed adjacent the mechanical resonator, the sensor circuit operable to supply (i) the electromagnetic field to excite each of the cantilevered tines and (ii) a sensor signal that is modulated based on the resonant vibration frequencies of each of the cantilevered tines. - View Dependent Claims (15, 16, 18, 20)
-
-
17. A method of generating an object identification signal, comprising the steps of:
-
exciting a mechanical resonator with an electromagnetic field to thereby cause the mechanical resonator to vibrate at one or more resonant vibration frequencies;
disposing an inductance coil adjacent the mechanical resonator, the inductance coil having an inductance that varies with the one or more resonant vibration frequencies of the mechanical resonator;
modulating a signal based on the inductance variation of the inductance coil to thereby generate a modulated signal having a plurality of frequency components; and
generating the object identification signal based on the frequency components of the modulated signal. - View Dependent Claims (19)
-
Specification