| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 864231 | Procedia Engineering | 2010 | 4 Pages |
Abstract
The methods needed to interrogate passive resonance sensors are studied. A portable impedance measurement unit and the methods to extract a coupling coefficient compensated resonance frequency are presented. The interrogation methods are demonstrated with ECG and pressure measurements. The results show that the quality of the ECG signal measured with a flexible textile coil is sufficient to extract the heart rate. In the case of a pressure sensor, the errors caused by the changes in the inductive coupling were satisfactorily removed by the introduced method.
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