Presentation of thermal sensation through preliminary adjustment of adapting skin temperature

2012 ◽  
Author(s):  
Shimon Akiyama ◽  
Katsunari Sato ◽  
Yasutoshi Makino ◽  
Takashi Maeno
Keyword(s):  
Skin Temperature ◽  
Thermal Sensation

scholarly journals Thermal Comfort-Based Personalized Models with Non-Intrusive Sensing Technique in Office Buildings

2019 ◽  
Vol 9 (9) ◽  
pp. 1768 ◽  
Author(s):  
Siliang Lu ◽  
Weilong Wang ◽  
Shihan Wang ◽  
Erica Cochran Hameen
Keyword(s):  
Surface Temperature ◽  
Skin Temperature ◽  
Thermal Environment ◽  
Thermal Sensation ◽  
Correlation Coefficients ◽  
Hvac Systems ◽  
Recall Score ◽  
Support Vector ◽  
Linear Kernel ◽  
Related Factors

Heating, ventilation and air-conditioning (HVAC) systems play a key role in shaping the built environment. However, centralized HVAC systems cannot guarantee the provision of a comfortable thermal environment for everyone. Therefore, a personalized HVAC system that aims to adapt thermal preferences has drawn much more attention. Meanwhile, occupant-related factors like skin temperature have not had standardized measurement methods. Therefore, this paper proposes to use infrared thermography to develop individual thermal models to predict thermal sensations using three different feature sets with the random forest (RF) and support vector machine (SVM). The results have shown the correlation coefficients between clothing surface temperature and thermal sensation are 11% and 3% higher than those between skin temperature and thermal sensation of two subjects, respectively. With cross-validation, SVM with a linear kernel and penalty number of 1, as well as RF with 50 trees and the maximum tree depth of 3 were selected as the model configurations. As a result, the model trained with the feature set, consisting of indoor air temperature, relative humidity, skin temperature and clothing surface temperature, and with linear kernel SVM has achieved 100% recall score on test data of female subjects and 95% recall score on that of male subjects.

Predicting indoor thermal sensation for the elderly in welfare centres in Korea using local skin temperatures

2016 ◽  
Vol 26 (8) ◽  
pp. 1155-1167 ◽  
Author(s):  
Chihye Bae ◽  
Hyunjung Lee ◽  
Chungyoon Chun
Keyword(s):  
Field Study ◽  
Skin Temperature ◽  
Elderly People ◽  
Thermal Sensation ◽  
The Elderly ◽  
The Body ◽  
Elderly Subjects ◽  
Climate Chamber ◽  
Local Skin ◽  
Skin Temperatures

This study aims to develop a method to predict thermal sensation in elderly people. To identify the point on the body where skin temperature can best predict thermal sensation in elderly people aged 65 or older and develop a thermal comfort measurement model that can replace the psychological scale, experiments were conducted in a stainless steel wall finish climate chamber and at the seven senior welfare centres in Korea. The results of the climate chamber experiment with 30 healthy elderly people (15 males, 15 females) showed that there was a correlation between thermal sensation and local skin temperature on the back of the hand, the upper arm, the top of the foot and the cheek. This developed thermal sensation prediction model was then applied in a field study at senior welfare centres to verify whether the model could be applied to a large number of elderly subjects in different locations. The field study with 294 elderly people (111 males, 183 females) shows that cheek and back of the hand skin temperatures were useful in predicting thermal sensation in the elderly, and predicted thermal sensation based on the skin temperature of the cheek had the strongest correlation with thermal sensation among the participants.

scholarly journals Thermal Sensation in Older People, with and without Dementia, Living in Residential Care: New Assessment Approaches Using Infrared Thermography

2020 ◽  
Author(s):  
Charmaine Childs ◽  
Jennifer Elliott ◽  
Khaled Khatab ◽  
Susan Hampshaw ◽  
Sally Fowler-Davis ◽  
...  
Keyword(s):  
Skin Temperature ◽  
Thermal Sensation ◽  
Care Home ◽  
Tympanic Temperature ◽  
Dominant Hand ◽  
Ambient Temperatures ◽  
Health And Wellbeing ◽  
Tympanic Membrane Temperature ◽  
Abbreviated Mental Test ◽  
The Relationship

The temperature of the indoor environment is important for health and wellbeing especially at the extremes of age. The study aim was to undertsand the relationship between self-reported thermal sensation and extremity skin temperature in care home residents with and without dementia. The Abbreviated Mental Test (AMT) was used to discriminate residents to two categories, those with and those without dementia. After acclimatisation, measurements included: tympanic membrane temperature, thermal sensation rating followed by infrared thermal mapping of non-dominant hand and forearm. Sixty-nine afebrile adults (60-101 years of age) were studied in groups of two to five, in mean ambient temperatures of 21.4oC-26.6oC (median 23.6oC). Significant differences were observed between groups; thermal sensation rating (p=0.02), tympanic temperature (p=0.01), fingertip skin temperature (p=0.01) and temperature gradients; fingertip-wrist p=0.001 and fingertip-distal forearm, p=0.001.

scholarly journals Thermal comfort, thermal sensation and skin temperature measurements using demand-controlled ventilation for individual cooling

2020 ◽  
Vol 172 ◽  
pp. 06001
Author(s):  
Håkon Solberg ◽  
Kari Thunshelle ◽  
Peter Schild
Keyword(s):  
Thermal Comfort ◽  
Skin Temperature ◽  
Energy Demand ◽  
Thermal Sensation ◽  
Air Velocity ◽  
Climate Chamber ◽  
Biometric Data ◽  
Ongoing Research ◽  
Demand Controlled Ventilation ◽  
The Relationship

An increasing part of modern building's energy demand is due to cooling. An ongoing research project investigates the possibility to reduce the energy consumption from cooling by utilizing an individually controlled active ventilation diffuser mounted in the ceiling. This study looks at thermal sensation and thermal comfort for 21 test persons exposed to an innovative user controlled active ventilation valve, in a steady and thermally uniform climate chamber. Furthermore, the relationship between biometric data from the test persons skin temperature and sweat, and the test persons thermal sensation scores has been investigated. Each test person was exposed to three different room temperatures in the climate chamber, 24°C, 26°C and 28°C respectively, to simulate typical hot summer conditions in an office in Norway. At a room temperature of 26°C it was possible to achieve acceptable thermal comfort for most test persons with this solution, but higher air velocity than 0.75 m/s around the test persons bodies at room temperatures of 28°C is required to ensure satisfactory thermal comfort.

scholarly journals Mean skin temperature estimated from 3 measuring points can predict sleeping thermal sensation

2019 ◽  
Vol 162 ◽  
pp. 106292 ◽  
Author(s):  
Li Lan ◽  
Lulu Xia ◽  
Jieyu Tang ◽  
David P. Wyon ◽  
Hua Liu
Keyword(s):  
Skin Temperature ◽  
Thermal Sensation ◽  
Mean Skin Temperature

scholarly journals Thermal Sensation in Older People with and without Dementia Living in Residential Care: New Assessment Approaches to Thermal Comfort Using Infrared Thermography

2020 ◽  
Vol 17 (18) ◽  
pp. 6932
Author(s):  
Charmaine Childs ◽  
Jennifer Elliott ◽  
Khaled Khatab ◽  
Susan Hampshaw ◽  
Sally Fowler-Davis ◽  
...  
Keyword(s):  
Skin Temperature ◽  
Infrared Thermography ◽  
Thermal Sensation ◽  
Imaging Modality ◽  
Care Home ◽  
Self Report ◽  
Tympanic Temperature ◽  
Dominant Hand ◽  
Ambient Temperatures ◽  
Multiple Regions

The temperature of the indoor environment is important for health and wellbeing, especially at the extremes of age. The study aim was to understand the relationship between self-reported thermal sensation and extremity skin temperature in care home residents with and without dementia. The Abbreviated Mental Test (AMT) was used to discriminate residents to two categories, those with, and those without, dementia. After residents settled and further explanation of the study given (approximately 15 min), measurements included: tympanic membrane temperature, thermal sensation rating and infrared thermal mapping of non-dominant hand and forearm. Sixty-nine afebrile adults (60–101 years of age) were studied in groups of two to five, in mean ambient temperatures of 21.4–26.6 °C (median 23.6 °C). Significant differences were observed between groups; thermal sensation rating (p = 0.02), tympanic temperature (p = 0.01), fingertip skin temperature (p = 0.01) and temperature gradients; fingertip-wrist p = 0.001 and fingertip-distal forearm, p = 0.001. Residents with dementia were in significantly lower air temperatures (p = 0.001). Although equal numbers of residents per group rated the environment as ‘neutral’ (comfortable), resident ratings for ‘cool/cold’ were more frequent amongst those with dementia compared with no dementia. In parallel, extremity (hand) thermograms revealed visual temperature demarcation, variously across fingertip, wrist, and forearm commensurate with peripheral vasoconstriction. Infrared thermography provided a quantitative and qualitative method to measure and observe hand skin temperature across multiple regions of interest alongside thermal sensation self-report. As an imaging modality, infrared thermography has potential as an additional assessment technology with clinical utility to identify vulnerable residents who may be unable to communicate verbally, or reliably, their satisfaction with indoor environmental conditions.

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