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Continuous monitoring of fatigue in factory workers

Continuous monitoring of fatigue in factory workers
2024-10-15
(Press-News.org) A system of wearable sensors and machine learning can continuously monitor factory workers for signs of physical fatigue. Factory work can be physically strenuous, and a safe and ethical workplace must ensure that workers do not become overly fatigued, which can increase the risk of injury and accident, cause chronic health problems, and also impair performance. A system designed by Ping Guo, Qi Zhu, and colleagues measures heart rate, heart rate variability, skin temperature, and locomotor patterns from six locations on the torso and arms. There are no broadly accepted biomarkers or metrics for fatigue, so the authors calibrated their measurements to self-reported perceived exertion, on a 0–10 scale. Forty-three participants, ages 18–56 years old, replicated two strenuous manufacturing tasks: composite sheet layup and wire harnessing, while wearing weighted vests to exaggerate the induced fatigue and simulate levels of fatigue that might be felt at the end of a full shift. Participants reported fatigue levels at multiple time points throughout a roughly hour-long data collection period. A machine learning model was able to use data from participants to predict fatigue levels in real time. The best mix of physiological signs to use to predict fatigue varied across individuals, but some universal trends were identified. The movements of the non-dominant arm universally betrayed fatigue. Whereas complex tasks such as wire harnessing required multiple modalities to capture fatigue. The authors also tested their system at large manufacturing factories in the US Midwest and West Coast. Real factory workers were somewhat reluctant to report that their work tasks were fatiguing and sweat made the adhesion of the sensors tricky. Despite these challenges, workers rated the system as unobtrusive and easy to use. According to the authors, the technology could improve factory safety, mitigate risks, and empower workers.

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[Press-News.org] Continuous monitoring of fatigue in factory workers