A Simple Method for Synchronising Multiple IMUs Using the Magnetometer

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]

simple_synchronising_multiple_imu_magnetometer_Gilbert_ISWC2022.pdf - Accepted Version

Download (1MB) | Preview

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:


Identification Number (DOI):


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."


wearable, synchronisation, sensors, magnetometer, imu

Departments, Centres and Research Units:



27 December 2022Published
26 August 2022Accepted

Event Location:

Cambridge, United Kingdom

Date range:

11 - 15 September 2022

Item ID:


Date Deposited:

11 Jan 2023 16:57

Last Modified:

29 Mar 2023 19:55

Peer Reviewed:

Yes, this version has been peer-reviewed.



View statistics for this item...

Edit Record Edit Record (login required)