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Design of Low Frequency High Resolution Integrated Bioimpedance Meter

Kaveh, Mohammad | 2010

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 40537 (05)
  4. University: Sharif University of Technology
  5. Department: Elctrical Engineering
  6. Advisor(s): Atarodi, Mojtaba; Mehrany, Khashayar
  7. Abstract:
  8. This thesis activities, consists of three main parts. The first part is, manufacturing and optimization of the electrical part of blood glucose measurement devices, based on electrochemical sensors. In this part, design of blood glucose measurement systems based on two and three electrode electrochemical sensors are proceeded and the accuracy of the electrical block, is increased up to 1mg/dl according to sensor current range. The second part, is related to the design of different probes for blood electrical characteristics (impedance magnitude) measurements, at low frequencies. Measurements with these probes show, first the blood impedance magnitude range at low frequencies and moreover, show that the blood impedance magnitude and the glucose solubale in plasma at low frequencies, indeed don’t have any direct and linear relationship. The third part, is related to the design of low frequency bio-impedance meter, according to the blood impedance measurement results in the previous part, which consists of two main parts, analog block for stimulus and digital block for data processing. Stimulus and measurement range is set according to blood impedance magnitude range at low frequencies, to maximize the measurement accuracy, moreover the power consumption of the designed chip, is reduced with respect to available designs and the system measurement and transmission time to send the measured values to the chip outputs, is too small, with respect to blood coagulation time, which is about two minutes
  9. Keywords:
  10. Blood Glucose Measurement Device ; Electrochemical Sensor ; Probe ; Blood Impedance ; Bioimpedance Meter

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