The paper proposes a method to assess and correct time synchronization issues in sensor networks. The key ideas are:
Leveraging the property that the rotational motion of rigidly connected sensors must be the same at all times, any time shift in the rotation magnitudes indicates a time offset between the sensor measurements.
Using a sliding window approach and a similarity measure based on the rotation magnitudes, the method estimates a time-varying time offset between two sensors.
An uncertainty measure is derived to assess the quality of the time offset estimation. This allows selective correction of timestamps or discarding of measurements based on the estimated uncertainty.
Experiments with simulated sensor data show that the approach can accurately estimate time offsets, even in the presence of high noise levels. The impact of synchronization issues on a tracking system is also demonstrated, highlighting the benefits of the proposed correction method.
The authors plan to release an open-source extension of the Excalibur library to enable the use of this approach.
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by Thomas Wodtk... о arxiv.org 10-01-2024
https://arxiv.org/pdf/2409.20266.pdfГлибші Запити