Integration and testing of a three-axis accelerometer in a woven e-textile sleeve for wearable movement monitoring

Li, M, Torah, R, Nunes-Matos, H, Wei, Y ORCID: https://orcid.org/0000-0001-6195-8595, Beeby, S, Tudor, J and Yang, K, 2020. Integration and testing of a three-axis accelerometer in a woven e-textile sleeve for wearable movement monitoring. Sensors, 20 (18): 5033. ISSN 1424-8220

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Abstract

This paper presents a method to integrate and package an accelerometer within a textile to create an electronic textile (e-textile). The smallest commercially available accelerometer sensor (2 mm × 2 mm × 0.95 mm) is used in the e-textile and is fully integrated within the weave structure of the fabric itself, rendering it invisible to the wearer. The e-textile forms the basis of a wearable woven sleeve which is applied to arm and knee joint bending angle measurement. The integrated e-textile based accelerometer sensor system is used to identify activity type, such as walking or running, and count the total number of steps taken. Performance was verified by comparing measurements of specific elbow joint angles over the range of 0° to 180° with those obtained from a commercial bending sensor from Bend Labs and from a custom-built goniometer. The joint bending angles, measured by all three sensors, show good agreement with an error of less than ~1% of reading which provides a high degree of confidence in the e-textile sensor system. Subsequently, knee joint angles were measured experimentally on three subjects with each being tested three times on each of three activities (walking, running and climbing stairs). This allowed the minimum and maximum knee joint angles for each activity to be determined. This data is then used to identify activity type and perform step counting.

Item Type:	Journal article
Publication Title:	Sensors
Creators:	Li, M., Torah, R., Nunes-Matos, H., Wei, Y., Beeby, S., Tudor, J. and Yang, K.
Publisher:	MDPI AG
Date:	4 September 2020
Volume:	20
Number:	18
ISSN:	1424-8220
Identifiers:	Number Type 10.3390/s20185033 DOI 1364861 Other
Rights:	© 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
Divisions:	Schools > School of Science and Technology
Record created by:	Linda Sullivan
Date Added:	11 Sep 2020 07:41
Last Modified:	31 May 2021 15:13
URI:	https://irep.ntu.ac.uk/id/eprint/40678

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