Low-Power Synchronization for Multi-IMU WSNs

Jona Cappelle; Sarah Goossens; Lieven De Strycker; Liesbet Van der Perre

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arXiv · 2309.14867

Low-Power Synchronization for Multi-IMU WSNs

Jona Cappelle·Sarah Goossens·Lieven De Strycker·Liesbet Van der Perre

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Abstract

Wireless time synchronization is one of the most important services in a Wireless Sensor Network (WSN). Inertial Measurement Units (IMUs) are often used in these WSNs in healthcare-related treatments. We present a low-power, wirelessly synchronized multi-IMU platform. The proposed approach synchronously captures packets from different IMUs and transmits the data over Bluetooth Low Energy (BLE) to a central Data Capturing Unit (DCU). The contribution of this work is, rather than focussing on the highest possible accuracy, to provide a low-power accurate enough solution for use in a multi-IMU WSN. We examine key factors affecting synchronization accuracy and elaborate on the implementation challenges. An accuracy of sub 1 us can be achieved with the approach using 74.8 J/h of energy, while a power-optimized implementation is presented with an accuracy of 200 us and an energy consumption of only 198 mJ/h. This approach suits the required accuracy and low-power requirements for a multi-IMU system.

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BibTeX RIS

Jona Cappelle, Sarah Goossens, Lieven De Strycker, Liesbet Van der Perre. 2023-09-26. Low-Power Synchronization for Multi-IMU WSNs. https://arxiv.org/abs/2309.14867

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