Low-Power Synchronization for Multi-IMU WSNs
2023
Online
report
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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Low-Power Synchronization for Multi-IMU WSNs
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Autor/in / Beteiligte Person: | Cappelle, Jona ; Goossens, Sarah ; De Strycker, Lieven ; Van der Perre, Liesbet |
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Veröffentlichung: | 2023 |
Medientyp: | report |
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