| 摘要 |
<p>The invention relates to a method for querying a passive sensor that comprises at least one piezoelectric resonator, characterised in that the method comprises the following steps: identifying the characteristic width of the resonance frequency band of the resonator ?f0S; determining a scanning pitch equal to a third of the measured bandwidth ?f = ?f0S /3; performing a first series of three querying measures with signals having a first frequency (f1), a second frequency (f2) and a third frequency (f3), respectively, in order to determine a first resonance value (y1), a second resonance value (y2) and a third resonance value (y3); determining by a parabolic fit operation the response curve of the resonator from said first, second and third resonance values in order to calculate a first real-time frequency value (f01) of the resonator. The invention also relates to an electronic device for querying a passive sensor including at least one piezoelectric resonator, and including a micro-controller for implementing the querying method of the present invention.</p> |
