Thermal comfort of seats as visualized by infrared thermography.

Published studies that deal with the question of how the temperature of chair seats influences human activities are few, but the studies considering such a factor, a function of the type of material, could contribute to improvements in the design of chairs. This study evaluates seat temperatures of 8 types of chairs made of different materials. The parts of the furniture that people come into contact with, and the thermal response of the material to heating and cooling have been evaluated. Infrared thermography was used for this, as it is a non-contact technique that does not present any type of risk in the measurement of temperatures. Seats made of synthetic leather (leatherette), wood and polyester fabric were found to have the highest temperatures, and the plywood seat showed the lowest. The study has also revealed that thermography can contribute to studies of thermal comfort of chair seats in addition to determining the most suitable material.

[1]  Hui Zhang,et al.  Energy-efficient comfort with a heated/cooled chair: Results from human subject tests , 2015 .

[2]  Bin Cao,et al.  Measurements of the additional thermal insulation of aircraft seat with clothing ensembles of different seasons , 2016 .

[3]  B. Vainer,et al.  FPA-based infrared thermography as applied to the study of cutaneous perspiration and stimulated vascular response in humans , 2005, Physics in medicine and biology.

[4]  A Melikov,et al.  Field study on occupant comfort and the office thermal environment in rooms with displacement ventilation. , 2005, Indoor air.

[5]  David Cebon,et al.  Materials Selection in Mechanical Design , 1992 .

[6]  E. Al-Eisa,et al.  Effect of Therapy Ball Seating on Learning and Sitting Discomforts among Saudi Female Students , 2013, BioMed research international.

[7]  P A Fenety,et al.  In-chair movement: validity, reliability and implications for measuring sitting discomfort. , 2000, Applied ergonomics.

[8]  Tülin Gündüz Cengiz,et al.  An on-the-road experiment into the thermal comfort of car seats. , 2007, Applied ergonomics.

[9]  N. Bouzida,et al.  Visualization of body thermoregulation by infrared imaging , 2009 .

[10]  Pascal Madeleine,et al.  The variability and complexity of sitting postural control are associated with discomfort. , 2010, Journal of biomechanics.

[11]  Zhuofu Liu,et al.  Settling down time following initial sitting and its relationship with comfort and discomfort. , 2011, Journal of tissue viability.

[12]  Mike Fray,et al.  Effect of long term driving on driver discomfort and its relationship with seat fidgets and movements (SFMs). , 2017, Applied ergonomics.

[13]  Helmut Berger,et al.  Office task effects on comfort and body dynamics in five dynamic office chairs. , 2012, Applied ergonomics.

[14]  Zhuofu Liu,et al.  Studying thermal characteristics of seating materials by recording temperature from 3 positions at the seat-subject interface. , 2011, Journal of tissue viability.

[15]  Christian Raschner,et al.  An Overview of Recent Application of Medical Infrared Thermography in Sports Medicine in Austria , 2010, Sensors.

[16]  Steven E. Butt,et al.  Using a psychophysical approach to identify a user's self selected thermal comfort on a task chair , 2015 .

[17]  Meimei Liu,et al.  Noise Removal Applied to a Temperature Signal from Body and Seat Contact Surface Based on the EMD Method , 2013 .

[18]  D. Wipke-Tevis,et al.  Elevated sacral skin temperature (T(s)): a risk factor for pressure ulcer development in hospitalized neurologically impaired Thai patients. , 2005, Applied nursing research : ANR.

[19]  Margarita Vergara,et al.  Relationship between comfort and back posture and mobility in sitting-posture. , 2002, Applied ergonomics.

[20]  A. Abdel-azim Fundamentals of Heat and Mass Transfer , 2011 .

[21]  William R Taylor,et al.  Are pressure measurements effective in the assessment of office chair comfort/discomfort? A review. , 2015, Applied ergonomics.

[22]  A. Rogalski Recent progress in infrared detector technologies , 2011 .

[23]  M. Ferrarin,et al.  Analysis of thermal properties of wheelchair cushions with thermography , 2006, Medical and Biological Engineering and Computing.

[24]  Peter J Keir,et al.  Effects of backrest design on biomechanics and comfort during seated work. , 2007, Applied ergonomics.

[25]  R I Barnett,et al.  Skin vascular reaction to short durations of normal seating. , 1995, Archives of physical medicine and rehabilitation.

[26]  P Plassmann,et al.  Digital infrared thermal imaging of human skin. , 2002, IEEE engineering in medicine and biology magazine : the quarterly magazine of the Engineering in Medicine & Biology Society.

[27]  C De Wagter,et al.  Practical and dosimetric implications of a new type of packaging for radiographic film. , 2005, Physics in medicine and biology.

[28]  Yuguo Li,et al.  Human thermal sensation and comfort in a non-uniform environment with personalized heating. , 2017, The Science of the total environment.

[29]  Maria Hagströmer,et al.  Does a dynamic chair increase office workers' movements? - Results from a combined laboratory and field study. , 2017, Applied ergonomics.

[30]  Tulin Gunduz Cengiz,et al.  The effects of ramie blended car seat covers on thermal comfort during road trials , 2009 .

[31]  Ivica Grbac,et al.  Thermal Comfort While Sitting on Office Chairs – Subjective Evaluations , 2012 .

[32]  Soteris A. Kalogirou,et al.  Infrared thermography (IRT) applications for building diagnostics: A review , 2014 .

[33]  Helmut Berger,et al.  Comparison of four specific dynamic office chairs with a conventional office chair: impact upon muscle activation, physical activity and posture. , 2012, Applied ergonomics.

[34]  Amy Musser,et al.  Combined effects of noise and temperature on human comfort and performance , 2010 .

[35]  T. Jayakumar,et al.  Medical applications of infrared thermography: A review , 2012, Infrared Physics & Technology.

[36]  Zhuofu Liu,et al.  A methodology using in-chair movements as an objective measure of discomfort for the purpose of statistically distinguishing between similar seat surfaces. , 2016, Applied ergonomics.

[37]  Aura Conci,et al.  Breast thermography from an image processing viewpoint: A survey , 2013, Signal Process..

[38]  W. Yoo Effects of the Ball-backrest Chair Combined with an Accelerometer on the Pain and Trunk Muscle Endurance of a Computer Worker with LBP , 2014, Journal of physical therapy science.