The integration of smart textiles enabling a non

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The integration of smart textiles enabling a noninvasive approach in monitoring the user’s vitals and
activities
Prof. Lieva Van Langenhove
Department of textiles
Components
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Sensors and actuators
Communication devices
Energy supply
Data processing
Connections and interconnections
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Miniaturisation, packaging, integration, transformation into
textiles
Concepts and electro/photo active materials
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Why textiles?
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All around
Versatile
Light weight
Large contact area with body
Comfortable
Easy to use
Electro conductive textiles
Stainless
steel
Knitted
Kevlar
coated
with
polypyrrol
Woven
copper
non woven
gold
Effects from nano to macro
Conductive knitted textiles as sensor
Textrodes
Respibelt
EMG monitoring
Myography for stress measurement
Contactless
Professional use
EMG sensors
embroidered
laminated
(www.context-project.org)
Pressure sensors
Double layer fabric:
No contact
contact
Quantum tunneling effect
Any mechanism that changes
conductivity is exploitable for sensors
• Carbon nanotubes for conductivity
• Fibre expansion changes conductivity:
• Extension
• Heating
• Humidity
• Chemicals
(E. Devaux ENSAIT)
Humidity control
Sensors:
www.Biotex-eu.com
Absorption:
•Thermoresponsive gels
•Supporting design
Optical sensor
filter
Signal A
Smart interface
Textile fibre
Signal A’
Signal B
Sensor/
Processing
unit
Smart interface: active dyes
skin pH
Skin pH-variation
after burn wound
days
L. Van der Schueren, K. De Clerck
Communication
Within components
Between components in a suit
‣ Conductive fibres
‣ Optical fibres
With the wearer:
• keyboard,
• display
Wide environment:
• Inductive (embroidery)
• Antenna (printing)
Data processing: Motherboard
Fibre transistor
Source
Semiconductor
Insulator
Gate
Drain
Conductive core: gate
Insulating coating
Semiconductor coating
Electrode: source
Electrode: drain
OFET: organic
field effect transistor
Coating: from dip to padding
OFET textile integration
Weaving structure
Right patterns
Right contacts
No falso contacts
Stable contacts
100µm
Gate source drain
PEDOT based battery
Conducting yarns
PEDOT:PSS
5 cm
1 cm
1
Textile substrate
Warp
1 mm
Weft
5 cm
Printed battery: results
Energy from light: PV
Solar bags
www.dephotex.com
Energy from motion: piezo electrics
Electrode
Piezo electric layer
Electrode
Deformation leads to E field
Needs large surface, no
thickness
PVDF
Challenges:
•Materials
•Concepts
•Production (poling)
Smart textile research
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Based on
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(semi)conductive materials and structures
Smart dyes
Conceptual design
Modelling and simulation
Manufacturing
Testing
Inner garment
Outer garment
External
Temperature
GPS
Antenna
Alarm
Accelerometers
Textile
Antenna
Flexible
Battery
Data
Recording
Processing
Transmission
Victim patch
Parameter
•Heart beat rate
•Respiratory rate
•Body Temperature
Cfr. inner garment
Key issues
Comfort
Working conditions – relevant parameters
Effective alarm generation
System maintenance
Ease of use
Weight
Cost
Robustness
Energy constraints
Long range transmission
Monitoring Centre
www.proetex.org
External
Temperature
1500€
25€
GPS
Antenna
Alarm
Accelerometers
Textile
Antenna
Flexible
Battery
Data
Recording
Processing
Transmission
150€
>600€
www.cutecircuit.com
Coordination action for enhancing the
breakthrough of intelligent textile systems
(e-textiles and wearable Microsystems)
www.
.eu
COLAE: Commercialisation Clusters of OLAE
www.
.eu

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