A digital signal processing algorithm on read out circuit for electrical capacitance tomography

The research relates to tomography technique based on electrical mass properties measurement. This study proposed electronic design of read out circuit (ROC) for signal processing in electrical capacitance tomography. The method is to capture the excitation and detection signal simultaneously using high speed analog-to-digital-converter (ADC) then save its reading to first-in-first-out (FIFO) memory. From the two signals, magnitude and phase can be determined. Therefore, calculation of capacitance and conductivity of object inside sensor is done using math equation.