Active, to be negotiated
SARDINI EMILIO; MICHELE BONA; SERPELLONI MAURO
SISTEMA ED UN METODO PER LA MISURAZIONE DI GRANDEZZE
This invention relates to a telemetry system for the wireless measurement of a quantity, comprising at least a passive transducer sensitive to a variation of said quantity and a reading unit coupled to said passive transducer and suitable to detect, condition and process information of a measurement coming from the passive transducer. Each passive transducer comprises a resistive transduction sensitive element, a calibration capacitor, suitable to define a working frequency of the system, and a first coupling inductor. The reading unit comprises a second coupling inductor suitable to realise an inductive coupling with said first coupling inductor, and detection means suitable to detect a variation of amplitude of the real part of the impedance of the assembly constituted by the passive transducer and the second coupling inductor, at the working frequency, said amplitude of the real part of the impedance depending on the resistance value of the sensitive element.