Wireless interrogation techniques for sensors utilizing inductively coupled resonance circuits | Zendy

Timo Salpavaara | Zendy; Jarmo Verho | Zendy; Pekka Kumpulainen | Zendy; Jukka Lekkala | Zendy

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Wireless interrogation techniques for sensors utilizing inductively coupled resonance circuits

Author(s) -

Timo Salpavaara,

Jarmo Verho,

Pekka Kumpulainen,

Jukka Lekkala

Publication year - 2010

Publication title -

procedia engineering

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.32

H-Index - 74

ISSN - 1877-7058

DOI - 10.1016/j.proeng.2010.09.086

Subject(s) - interrogation , electrical impedance , resonance (particle physics) , acoustics , pressure sensor , electromagnetic coil , coupling (piping) , signal (programming language) , electronic circuit , materials science , electronic engineering , inductive sensor , electrical engineering , computer science , engineering , physics , mechanical engineering , archaeology , particle physics , metallurgy , history , programming language

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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