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A New Approach to Defining Human Touch Temperature StandardsDefining touch temperature limits for skin contact with both hot and cold objects is important to prevent pain and skin damage, which may affect task performance or become a safety concern. Pain and skin damage depend on the skin temperature during contact, which depends on the contact thermal conductance, the object's initial temperature, and its material properties. However, previous spacecraft standards have incorrectly defined touch temperature limits in terms of a single object temperature value for all materials, or have provided limited material-specific values which do not cover the gamut of likely designs. A new approach has been developed for updated NASA standards, which defines touch temperature limits in terms of skin temperature at pain onset for bare skin contact with hot and cold objects. The authors have developed an analytical verification method for safe hot and cold object temperatures for contact times from 1 second to infinity.
Document ID
20100020960
Document Type
Conference Paper
Authors
Ungar, Eugene (NASA Johnson Space Center Houston, TX, United States)
Stroud, Kenneth (NASA Johnson Space Center Houston, TX, United States)
Date Acquired
August 25, 2013
Publication Date
January 1, 2010
Subject Category
Man/System Technology and Life Support
Report/Patent Number
JSC-CN-20089
Meeting Information
40th International Conference on Environmental Systems(Barcelona)
Funding Number(s)
WBS: WBS 644423.06.31.03.12.10
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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