milano, june 25, 2013
riccardo marchesi
digital fabrics
sources: CISCO, Jim Cicconi, AT&T, Steve Leibson, Computer History Museum, CNN, University of Michigan, Fraunhofer
“These things are not just smart phones and
tablets”
internet of things
... ...internet
of fabrics
textile sensor interface ADC μ
physicalquantity IP
module
WAN
available 2013-2015 2013-2015 2015-2018 2016-2020
internet of fabrics
why fabrics?
they cover about 75% of our body
fabrics are everywhere in our homes (bed sheets, carpets, walls, sofas and chairs..
they represent the perfect place to embed sensors and electronics
how can fabrics help us?
sensing elements for rehabilitation
sensing elements for increased comfort
mapping floors for emergencies
posture control
sensing wetness
robotics
? (just use your imagination)
how can I do that?
electronics
www.arduino.cc
textile buttons
www.plugandwear.com
Touch sensitive fabric
• Knitted three-layered fabric, two conductive layers with a non-conductive layer in between • If pressed, the conductive
layers touch allowing current flow • Materials: acrylic yarn,
stainless steel
Pressure sensitive fabric
Characteristics Activation force 3.6 Kg per
50 mm diameter •• More then 1.000.000 cycles•• For a 15 cm x 20 cm switch
resistance when pressed: around 200 Ohm, open circuit when non pressed
textile push button electrical behaviour
theoretical behaviour
real behaviour
textile push button
digital
analog
Rtot
= Ru + R
c+ R
l ≈ C
Rtot
= Ru + R
c+ R
l ≠ C
water sensors
www.plugandwear.com
digital signalsHIGH and LOW levels
textile potentiometer
potentiometer = variable resistorcan be used for controlling sound or light
level, changing the frequency of a flashing LED
textile potentiometer electrical behaviour
theoretical behaviour real behaviour
analog pressure sensors
www.plugandwear.com
analog press button
sensitive layer
conductive side
conductive side
stretch sensors
www.plugandwear.com
reading an analog input
matrix pressure sensor
www.plugandwear.com
matrix pressure sensor
matrix pressure sensor
matrix pressure sensor
matrix pressure sensor
IROMEC – light emitting fabric
IROMEC – sensitive top cover
posture monitoring
rehabilitation
riccardo marchesi@plugandwear
www.plugandwear.com
thank you!
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