Russo, S, Nefti-Meziani, S, Carbonaro, N and Tognetti, A 2017, 'Development of a high-speed current injection and voltage measurement system for electrical impedance tomography-based stretchable sensors' , Technologies, 5 (3) , p. 48.
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Abstract
In common EIT systems, the voltage data are serially measured by means of multiplexers, and are hence collected at slightly different times, which affects the real-time performance of the system. They also tend to have complicated hardware, which increases power consumption. In this paper, we present our design of a 16-electrode high-speed EIT system that simultaneously implements constant current injection and differential potential measurements. This leads to a faster, simpler-to-implement and less-noisy technique, when compared with traditional EIT approaches. Our system consists of a Howland current pump with two multiplexers for a constant DC current supply, and a data acquisition card. It guarantees a data collection rate of 78 frames/s. The results from our conductive stretchable fabric sensor show that the system successfully performs voltage data collection with a mean signal-to-noise ratio (SNR) of 55 dB, and a mean absolute deviation (MAD) of 0.5mV. The power consumption can be brought down to 3mW; therefore, it is suitable for battery-powered applications. Finally, pressure contacts over the sensor are properly reconstructed, thereby validating the efficiency of our EIT system for soft and stretchable sensor applications.
| Item Type: | Article |
|---|---|
| Schools: | Schools > School of Computing, Science and Engineering |
| Journal or Publication Title: | Technologies |
| Publisher: | MDPI AG |
| ISSN: | 2227-7080 |
| Related URLs: | |
| Funders: | European Union Seventh Framework Programme FP7/2007-2013/ |
| Depositing User: | S Russo |
| Date Deposited: | 29 Aug 2017 11:18 |
| Last Modified: | 15 Feb 2022 22:23 |
| URI: | https://usir.salford.ac.uk/id/eprint/43615 |
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