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Sensors 2016, 16(4), 420; doi:10.3390/s16040420

Estimation of Thermal Sensation Based on Wrist Skin Temperatures

1
Interdisciplinary Program for Bioengineering, College of Engineering, Seoul National University, Seoul 03080, Korea
2
Samsung Advanced Institute of Technology, 130 Samsung-ro, Yeoungtong-gu, Suwon-si, Gyeonggi-do 16678, Korea
3
Department of Biomedical Engineering, College of Medicine, Seoul National University, Seoul 03080, Korea
These authors contributed equally to this work.
*
Author to whom correspondence should be addressed.
Academic Editor: Angelo Maria Sabatini
Received: 17 December 2015 / Revised: 8 March 2016 / Accepted: 18 March 2016 / Published: 23 March 2016
(This article belongs to the Section Physical Sensors)
View Full-Text   |   Download PDF [2607 KB, uploaded 23 March 2016]   |  

Abstract

Thermal comfort is an essential environmental factor related to quality of life and work effectiveness. We assessed the feasibility of wrist skin temperature monitoring for estimating subjective thermal sensation. We invented a wrist band that simultaneously monitors skin temperatures from the wrist (i.e., the radial artery and ulnar artery regions, and upper wrist) and the fingertip. Skin temperatures from eight healthy subjects were acquired while thermal sensation varied. To develop a thermal sensation estimation model, the mean skin temperature, temperature gradient, time differential of the temperatures, and average power of frequency band were calculated. A thermal sensation estimation model using temperatures of the fingertip and wrist showed the highest accuracy (mean root mean square error [RMSE]: 1.26 ± 0.31). An estimation model based on the three wrist skin temperatures showed a slightly better result to the model that used a single fingertip skin temperature (mean RMSE: 1.39 ± 0.18). When a personalized thermal sensation estimation model based on three wrist skin temperatures was used, the mean RMSE was 1.06 ± 0.29, and the correlation coefficient was 0.89. Thermal sensation estimation technology based on wrist skin temperatures, and combined with wearable devices may facilitate intelligent control of one’s thermal environment. View Full-Text
Keywords: thermal sensation; thermal comfort; wrist skin temperature; wearable device thermal sensation; thermal comfort; wrist skin temperature; wearable device
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Sim, S.Y.; Koh, M.J.; Joo, K.M.; Noh, S.; Park, S.; Kim, Y.H.; Park, K.S. Estimation of Thermal Sensation Based on Wrist Skin Temperatures. Sensors 2016, 16, 420.

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