Patent ID: 8436512
Filing Date: 2013-05-07
Classification: B60C,G01N,G01S,H04Q

Abstract:
1. A method of remotely interrogating a passive sensor, comprising at least one resonator, so as to determine the resonant frequency of said resonator, having a resonant frequency response defined by the design of said resonator, the method comprising: a preliminary frequency-scan step for interrogating said resonator over a frequency range determined by the design of said resonator, allowing for the rapid determination of a resonant frequency response centred on a preliminary resonant frequency (fr a first step of a first couple of interrogations of said resonator at a first frequency (f a second step of determining the amplitude difference (Δ(Pf a third step allowing a first resonant frequency (fr wherein the first, second and third steps are reiterated and an (i+1)th resonant frequency (fr