title: Estimation of Thermal Sensation Based on Wrist Skin Temperatures.
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.
authors.affiliation: Interdisciplinary Program for Bioengineering, College of Engineering, Seoul National University, Seoul 03080, Korea. kusashim@bmsil.snu.ac.kr.
authors.forename: Soo Young
authors.initials: SY
authors.lastname: Sim
authors.affiliation: Interdisciplinary Program for Bioengineering, College of Engineering, Seoul National University, Seoul 03080, Korea. bioeng15@bmsil.snu.ac.kr.
authors.forename: Myung Jun
authors.initials: MJ
authors.lastname: Koh
authors.affiliation: Interdisciplinary Program for Bioengineering, College of Engineering, Seoul National University, Seoul 03080, Korea. jkm6510@bmsil.snu.ac.kr.
authors.forename: Kwang Min
authors.initials: KM
authors.lastname: Joo
authors.affiliation: Samsung Advanced Institute of Technology, 130 Samsung-ro, Yeoungtong-gu, Suwon-si, Gyeonggi-do 16678, Korea. seungwoo.noh@samsung.com.
authors.forename: Seungwoo
authors.initials: S
authors.lastname: Noh
authors.affiliation: Samsung Advanced Institute of Technology, 130 Samsung-ro, Yeoungtong-gu, Suwon-si, Gyeonggi-do 16678, Korea. syun12.park@samgsung.com.
authors.forename: Sangyun
authors.initials: S
authors.lastname: Park
authors.affiliation: Samsung Advanced Institute of Technology, 130 Samsung-ro, Yeoungtong-gu, Suwon-si, Gyeonggi-do 16678, Korea. yh92.kim@samsung.com.
authors.forename: Youn Ho
authors.initials: YH
authors.lastname: Kim
authors.affiliation: Department of Biomedical Engineering, College of Medicine, Seoul National University, Seoul 03080, Korea. pks@bmsil.snu.ac.kr.
authors.forename: Kwang Suk
authors.initials: KS
authors.lastname: Park
mesh_terms: D000328:Adult; D005260:Female; D006801:Humans; D008297:Male; D008991:Monitoring, Physiologic / Q000295:instrumentation*; D011788:Quality of Life; D012881:Skin Temperature / Q000502:physiology*; D013697:Thermosensing / Q000502:physiology*; D014953:Wrist / Q000502:physiology*
keywords: thermal comfort; thermal sensation; wearable device; wrist skin temperature