Analysis of Interface Material Noise in Non-contact Capacitive Sensing

Yijing Zhang; Lin Xu; Massimo Mischi; Eugenio Cantatore; Pieter Harpe

doi:10.1109/EMBC48229.2022.9871024

Analysis of Interface Material Noise in Non-contact Capacitive Sensing

Yijing Zhang, Lin Xu, Massimo Mischi, Eugenio Cantatore, Pieter Harpe

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic › peer-review

Abstract

The thermal noise due to the resistivity of insulation materials can become a significant noise source in non-contact capacitive sensing, especially when measuring micro-volt-level physiological signals. Since both the impedance and the resistivity of practical insulation materials may be strongly frequency dependent, their thermal noise is often frequency dependent. This paper studies the impedance and noise behavior of different interface materials as function of frequency, by means of modelling, simulations, and experimental measurements. The results show that the inherent resistive noise of some fabrics (e.g., cotton, polyester) could outweigh the typical noise level of circuits for physiological sensing; and as a result, the interface noise can limit the quality of low-amplitude signal detection. Clinical Relevance - This study gives a guideline for material selection from the noise perspective in case of capacitive electrode sensing.

Original language	English
Title of host publication	44th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBC 2022
Publisher	Institute of Electrical and Electronics Engineers
Pages	1270-1274
Number of pages	5
ISBN (Electronic)	9781728127828
DOIs	https://doi.org/10.1109/EMBC48229.2022.9871024
Publication status	Published - Jul 2022
Event	44th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBC 2022 - Scottish Event Campus, Glasgow, United Kingdom Duration: 11 Jul 2022 → 15 Jul 2022 Conference number: 44

Conference

Conference	44th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBC 2022
Abbreviated title	EMBC 2022
Country/Territory	United Kingdom
City	Glasgow
Period	11/07/22 → 15/07/22

Bibliographical note

Funding Information:
This work with project number 14663 is financed by the Dutch Research Council (NWO).

Funding

This work with project number 14663 is financed by the Dutch Research Council (NWO).

Keywords

Electric Impedance
Electrodes
Noise

Access to Document

10.1109/EMBC48229.2022.9871024

Cite this

Zhang, Y., Xu, L., Mischi, M., Cantatore, E., & Harpe, P. (2022). Analysis of Interface Material Noise in Non-contact Capacitive Sensing. In 44th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBC 2022 (pp. 1270-1274). Article 9871024 Institute of Electrical and Electronics Engineers. https://doi.org/10.1109/EMBC48229.2022.9871024

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abstract = "The thermal noise due to the resistivity of insulation materials can become a significant noise source in non-contact capacitive sensing, especially when measuring micro-volt-level physiological signals. Since both the impedance and the resistivity of practical insulation materials may be strongly frequency dependent, their thermal noise is often frequency dependent. This paper studies the impedance and noise behavior of different interface materials as function of frequency, by means of modelling, simulations, and experimental measurements. The results show that the inherent resistive noise of some fabrics (e.g., cotton, polyester) could outweigh the typical noise level of circuits for physiological sensing; and as a result, the interface noise can limit the quality of low-amplitude signal detection. Clinical Relevance - This study gives a guideline for material selection from the noise perspective in case of capacitive electrode sensing.",

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author = "Yijing Zhang and Lin Xu and Massimo Mischi and Eugenio Cantatore and Pieter Harpe",

note = "Funding Information: This work with project number 14663 is financed by the Dutch Research Council (NWO). ; 44th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBC 2022, EMBC 2022 ; Conference date: 11-07-2022 Through 15-07-2022",

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doi = "10.1109/EMBC48229.2022.9871024",

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Zhang, Y , Xu, L , Mischi, M , Cantatore, E & Harpe, P 2022, Analysis of Interface Material Noise in Non-contact Capacitive Sensing. in 44th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBC 2022., 9871024, Institute of Electrical and Electronics Engineers, pp. 1270-1274, 44th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBC 2022, Glasgow, United Kingdom, 11/07/22. https://doi.org/10.1109/EMBC48229.2022.9871024

Analysis of Interface Material Noise in Non-contact Capacitive Sensing. / Zhang, Yijing ; Xu, Lin ; Mischi, Massimo et al.
44th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBC 2022. Institute of Electrical and Electronics Engineers, 2022. p. 1270-1274 9871024.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic › peer-review

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Analysis of Interface Material Noise in Non-contact Capacitive Sensing

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Keywords

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