Gilbert, Thomas; Day, Sally; Hamilton, Antonia F De C and Ward, Jamie A. 2022. A Simple Method for Synchronising Multiple IMUs Using the Magnetometer. Proceedings of the 2022 ACM International Symposium on Wearable Computers, pp. 100-102. [Article]

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Abstract or Description

This paper presents a novel method to synchronise multiple IMU (inertial measurement units) devices using their onboard magnetometers. The method described uses an external electromagnetic pulse to create a known event measured by the magnetometer of multiple IMUs and in turn used to synchronise these devices. The method is applied to 4 IMU devices decreasing their de-synchronisation from 270ms when using only the RTC (real time clock) to 40ms over a 1 hour recording. It is proposed that this can be further improved to approximately 3ms by increasing the magnetometer’s sample frequency from 25Hz to 300Hz.

Item Type:	Article
Identification Number (DOI):	https://doi.org/10.1145/3544794.3558466
Additional Information:	"© 2022 Copyright held by the owner/author(s). This is the author's version of the work. It is posted here for your personal use. Not for redistribution. The definitive Version of Record is available at, https://doi.org/10.1145/3544794.3558466."
Keywords:	wearable, synchronisation, sensors, magnetometer, imu
Departments, Centres and Research Units:	Computing
Dates:	Date Event 27 December 2022 Published 26 August 2022 Accepted
Event Location:	Cambridge, United Kingdom
Date range:	11 - 15 September 2022
Item ID:	33045
Date Deposited:	11 Jan 2023 16:57
Last Modified:	29 Mar 2023 19:55
Peer Reviewed:	Yes, this version has been peer-reviewed.
URI:	https://research.gold.ac.uk/id/eprint/33045

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