Abstract
A custom made DAQ-card based bioimpedance measurement system is presented. The signals are processed by the digital lock-in technique. The system was tested on an electrical model of skin with underlying tissues over a frequency range of 20 Hz to 1 MHz. The measurements performed directly with the DAQ-card are compared to the measurements with the instrumentation amplifier interface. The highest achieved accuracy without special calibration and compensation is about 0.5 % for the impedance magnitude and 0.02° for the impedance phase angle in the low frequency region, whereas in the high frequency region the respective values are approximately 1 % and 1°.
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© 2007 Springer-Verlag Berlin Heidelberg
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Zagar, T., Krizaj, D. (2007). A simple DAQ-card based bioimpedance measurement system. In: Jarm, T., Kramar, P., Zupanic, A. (eds) 11th Mediterranean Conference on Medical and Biomedical Engineering and Computing 2007. IFMBE Proceedings, vol 16. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-73044-6_45
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DOI: https://doi.org/10.1007/978-3-540-73044-6_45
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-540-73043-9
Online ISBN: 978-3-540-73044-6
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