Sensors, Vol. 19, Pages 4008: A Container-Attachable Inertial Sensor for Real-Time Hydration Tracking

Sensors, Vol. 19, Pages 4008: A Container-Attachable Inertial Sensor for Real-Time Hydration Tracking Sensors doi: 10.3390/s19184008 Authors: Henry Griffith Yan Shi Subir Biswas Various sensors have been proposed to address the negative health ramifications of inadequate fluid consumption. Amongst these solutions, motion-based sensors estimate fluid intake using the characteristics of drinking kinematics. This sensing approach is complicated due to the mutual influence of both the drink volume and the current fill level on the resulting motion pattern, along with differences in biomechanics across individuals. While motion-based strategies are a promising approach due to the proliferation of inertial sensors, previous studies have been characterized by limited accuracy and substantial variability in performance across subjects. This research seeks to address these limitations for a container-attachable triaxial accelerometer sensor. Drink volume is computed using support vector machine regression models with hand-engineered features describing the container’s estimated inclination. Results are presented for a large-scale data collection consisting of 1908 drinks consumed from a refillable bottle by 84 individuals. Per-drink mean absolute percentage error is reduced by 11.05% versus previous state-of-the-art results for a single wrist-wearable inertial measurement unit (IMU) sensor assessed using a similar experimental protocol. Estimates of aggregate...
Source: Sensors - Category: Biotechnology Authors: Tags: Article Source Type: research
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