Realtime Transfer Function Estimation in Electrochemical Impedence Spectroscopy System using an Embedded Computer

Author: Benjamin Jones

Description:

Electrochemical Impedence Spectroscopy is fundamentally the process of estimating the transfer function-- the frequency-dependent impedence characterisitcs of an electrochemical system. EIS can help identify irregularities in biological systems such as brain injuries. This project extends the work of an EIS system from data gathering and post-processing, to online realtime analysis. This is accomplished with the use of a multi-channel 24-bit ADC combined with an embedded computer performing the digital signal processing. An analysis of the electrical characteristics, computational performance, and detection capabilities of the system are performed.