EAN: 9783954890378

WEARABLE TECHNOLOGIES FOR SWEAT RATE AND CONDUC...

Wearable sensors present a new frontier in the development of monitoring techniques. They are
of great importance in sectors such as sports and healthcare  as they permit the continuous
monitoring of physiological and biological elements  such as ECG and human sweat. Until
recently  this could only be carried out in specialized laboratories in the presence of
cumbersome  and usually  expensive devices. Sweat monitoring sensors integrated onto textile
substrates are not only part of a new field of work but  they also represent the first attempt
to implement such an innovative idea on a system which will be worn directly on the body. The
objective of this book is to present possible designs and technologies of low cost wearable
sweat rate and conductivity sensors integrated onto a textile. The first chapter deals with a
preliminary introduction on sweat production and composition  and the applications of wearable
devices. Further  the second chapter describes the conductivity sensor  i.e. the geometry 
materials and the coupling which includes a temperature sensor for precise measurements are
discussed. This is followed by a chapter on the sweat rate sensor  and the technologies
employed to fabricate it. Sensors that are based on a) conductive yarns coated with hydrophilic
polymers  b) conductive polymer fibres  c) hydrophilic polymers between conductive fabrics and
d) humidity sensors are described in detail. Finally  the last chapter provides a study of
sweat production in different body areas  the calibration procedure  and summarizes the results
which arise from the tests on volunteers.

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