Switching of a Sixteen Electrode Array for Wireless EIT System Using a RF-Based 8-Bit Digital Data Transmission Technique

Bera, Tushar Kanti and Nagaraju, J (2012) Switching of a Sixteen Electrode Array for Wireless EIT System Using a RF-Based 8-Bit Digital Data Transmission Technique. In: 4th ObCom International Conference on Recent Trends in Computing, Communication and Information Technology, DEC 09-11, 2011 , Vellore, INDIA , pp. 202-211.

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Abstract

Surface electrode switching of 16-electrode wireless EIT is studied using a Radio Frequency (RF) based digital data transmission technique operating with 8 channel encoder/decoder ICs. An electrode switching module is developed the analog multiplexers and switched with 8-bit parallel digital data transferred by transmitter/receiver module developed with radio frequency technology. 8-bit parallel digital data collected from the receiver module are converted to 16-bit digital data by using binary adder circuits and then used for switching the electrodes in opposite current injection protocol. 8-bit parallel digital data are generated using NI USB 6251 DAQ card in LabVIEW software and sent to the transmission module which transmits the digital data bits to the receiver end. Receiver module supplies the parallel digital bits to the binary adder circuits and adder circuit outputs are fed to the multiplexers of the electrode switching module for surface electrode switching. 1 mA, 50 kHz sinusoidal constant current is injected at the phantom boundary using opposite current injection protocol. The boundary potentials developed at the voltage electrodes are measured and studied to assess the wireless data transmission.

Item Type:	Conference Paper
Series.:	Communications in Computer and Information Science
Publisher:	SPRINGER-VERLAG BERLIN
Additional Information:	Copyright for this article belongs to SPRINGER-VERLAG BERLIN, GERMANY
Keywords:	electrical impedance tomography;EIT;wireless-EIT;Radio Frequency (RF);surface electrode switching;opposite current injection protocol;digital data transmission;phantoms; boundary potential data
Department/Centre:	Division of Physical & Mathematical Sciences > Instrumentation Appiled Physics
Date Deposited:	12 Feb 2013 10:54
Last Modified:	14 Feb 2013 11:56
URI:	http://eprints.iisc.ac.in/id/eprint/45800

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