The Study of Electrode Model Analysis and Its Automated Compensation

  • 楊 松樺

Student thesis: Master's Thesis


The main function of electrodes is to reduce the contact impedance between human bodies and electric circuits However electrodes are not perfect conductors so the impedance of the skin-electrode interface will distort the measurement results In biomedical measurement applications neglecting this distortion can result in misjudgment about the actual physiological condition of subjects Thus it is necessary to establish a method to compensate for the distortion caused by electrodes In this research we establish a universal process of signal compensation for all types of electrodes A specific compensation circuit for a certain type of electrode can be established through this process to eliminate the distortion caused by the electrodes and to increase the accuracy of biomedical measurements The results of this study reveal that there are huge differences between electrodes of the same type so the distortion caused by electrodes should be addressed on a case-by-case basis A compensation circuit can accurately compensate for the distortion caused by the capacitance of electrodes in specific frequency bands However there remains a slight difference in the frequency response at low frequencies between the simulation and actual circuit
Date of Award2016 Aug 23
Original languageEnglish
SupervisorKuo-Sheng Cheng (Supervisor)

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