Switch Configuration Effect on Stray Capacitance in Electrical Capacitance Volume Tomography Hardware
Abstract: Electrical
capacitance volume tomography (ECVT) system uses six switches in one channel
with configuration resembling “T” letter, so it is called “T-switch”. The
working scheme of the switch can beexplained in four different modes of
operation, i.e. excitation mode, detection mode, ground mode, andfloating mode.
This research describes the effect of switch configuration to stray capacitance
in ECVThardware. Stray capacitance introduces parasitic signal from other
sources; one of them is signal fromanother electrode at floating mode when the
signal is still flowing to detection circuit. One channel, twochannels, three
channels, so on until thirty-two channels are connected to single detection
circuitsequentially to investigate the effect of stray capacitance. Both
simulation and experiment show the stray capacitance increases along with
addition of channel corresponds to 0.046pF for each channel.
Author: Arba’i Yusuf
Journal Code: jptkomputergg160278
