期刊
IEEE SENSORS JOURNAL
卷 21, 期 10, 页码 12322-12337出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JSEN.2021.3064707
关键词
Heart rate variability; Sensors; Electrocardiography; Biomedical measurement; Physiology; Electroencephalography; Sensor phenomena and characterization; Thermal comfort; environmental control; human perception; thermal sensation vote; wearable sensors; heart rate variability
资金
- European Union's Horizon 2020 Research and Innovation Programme [768718]
- H2020 Societal Challenges Programme [768718] Funding Source: H2020 Societal Challenges Programme
This study shows that combining environmental parameters and physiological indicators can improve the prediction of thermal sensation vote (TSV) compared to using only HRV features, with an average accuracy of 92.2%. By utilizing HRV features as the input for Machine Learning classification algorithms, the research demonstrates that physiological quantities related to thermal comfort can enhance TSV prediction when combined with environmental quantities.
This paper presents the results from the experimental application of smartwatch sensors to predict occupants' thermal comfort under varying environmental conditions. The goal is to investigate the measurement accuracy of smartwatches when used as thermal comfort sensors to be integrated into Heating, Ventilation and Air Conditioning (HVAC) control loops. Ten participants were exposed to various environmental conditions as well as warm - induced and cold-induced discomfort tests and 13 participants were exposed to a transient-condition while a network of sensors and a smartwatch collected both environmental parameters and heart rate variability (HRV). HRV features were used as input to Machine Learning (ML) classification algorithms to establish whether a user was in discomfort, providing an average accuracy of 92.2 %. ML and Deep Learning regression algorithms were trained to predict the thermal sensation vote (TSV) in a transient environment and the results show that the aggregation of environmental and physiological quantities provide a better TSV prediction in terms of Mean Absolute Error (MAE) and Mean Absolute Percentage Error (MAPE), 1.2 and 20% respectively, than just the HRV features used for the prediction. In conclusion, this experiment supports the assumption that physiological quantities related to thermal comfort can improve TSV prediction when combined with environmental quantities.
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