Wearable electronics and textile applications
Erika Györvary
Outline of the presentation
Smart shirt with electronics resulting from
EC IST WEALTHY project
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Wearable electronics and textile applications
• Leisure and fun
• Sport
• Professional
• Health / telemonitoring
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Portable biomedical devices
Intelligent tele-alarm system
Objective
• Development of an automatic
and reliable fall detector
Features
• Activity monitoring
• Detection rate of 95%
• Interactive functionality
• RF alarm transmission
• Interface with base station
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Portable biomedical devices
PULSEAR
Objective
• integration of HR monitor
in an earphone
Technology platform
• optical sensing of pulsatile blood flow
• acceleration sensing for motion
artefacts removal
Key features
• comfortable and non-invasive method
• robust and reliable pulse detection
during sport activities
• low-power consumption
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Portable biomedical devices
SENSATION – non-invasive hemodynamic sensor
Objective
• development of a robust, non-invasive
oximetry sensors
• different targets (earphone, fingering)
Technology platform
• optical sensing of pulsatile blood flow with
acceleration sensing for motion artifact
removal
Key features
• differential SpO2 measurement
• integrated sensor unit (ambient artifacts)
• wireless
• active artifact cancellation for long
term monitoring under real life conditions
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Portable biomedical devices
Parkinson disease management
Objective
• Monitoring of patients suffering from
Parkinson disease or spasticity
• Eventually closing the loop
for drug dispensing
Features
• Wireless monitoring of tremor and
spasticity parameters
• Acquisition on several limbs
• Data collection on portable base unit
(body area network)
• On-body signal processing
• Downloading (Ethernet or USB)
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Portable biomedical devices
Monitoring of physiological signals
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Portable biomedical devices
LTMS - Aurora Programme
Objective
•
architecture design of intelligent
and comfortable monitoring
system
Features
•
monitoring ECG, SpO2,
respiration, activity and NIBP
•
wireless communication to
base station
•
data management and
transmission
from Concordia to Europe
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From multi-parameters to redundant sensors: textiles
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Roles of the on-body electronics
• Provide a wired interface with the
garment sensors
• Provide a wireless interface with a
mobile phone or PDA and a link to
the professional interface
• Perform signal acquisition, digital
conversion and local data storage
• Perform signal processing (feature
extraction, classification, etc.)
• Manage the wearable application
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Textile Platforms: Second skin
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Textile Platforms: Catsuit and long sleeve
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Bed sheets
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Plethysmography by piezoresistive fabric
Two piezoresistive fabric sensors integrated in a seamless shirt providing information
about thoracic and abdominal respiration
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Strain sensors based on carbon loaded silicone coating
Piezoresistive sensors originated
from a coating process by using
carbon loaded silicone
• Sensor advantages
• Sensor disadvantages
• Easy to wear
• Long settling time after relaxing
• Multi-dimensional movement
representation
• High to very high impedance values
• Tracks connected in series
• Fast response to stretching
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Patient Portable Unit
•
Small and Lightweight
Only 145g, small PDA size
•
Easy user interface
•
Data transmission over GPRS link
•
Sensor interfaces for:
•
•
•
5-lead ECG
•
Impedance measurement (respiration)
•
Piezo-resistive bands (movement)
•
Skin temperature
•
Standard oximetry sensor
•
Integrated accelerometers
Signal processing
•
Heart rate
•
ECG enhancement
Powered by a Li-Ion battery
•
Autonomy up to 4 hours with real-time
streaming of all signals over GPRS
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MyHeart electronics
• Acquired signals
•
3-lead ECG (5 and 6 elec.)
•
1 impedance cardiogram (ICG)
•
1 respiration by impedance
•
1 respiration by piezo-resistance
•
1 skin impedance
•
3D or 2x2D accelerometers
•
1 respiration sound
•
32 strain resistance (FE-2)
• Communication
•
Download of stored data and streaming
mode over Bluetooth
•
Link with mobile phone and PC
• Size
•
88 x 67 x 18 mm
•
100 grams (incl. battery)
• Generic processing modules
•
HR, RR, ECG index features
•
BR, BA features
•
ACC fo, power, motion index
•
Activity classification
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The journey to tomorrow
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SFIT: today
Sensing, processing and communicating
EC IST MyHeart & Wealthy projects
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SFIT: tomorrow
Micro-communicating:
sensor interface,
processing and wireless
Microsystems physical sensors
(attitude, fall, health, …)
Flexible displays
 Nano-engineered surfaces
 Conductive fabrics
Point of care
 Micro-interfaces
Micro-energy generators
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SFIT: the journey to tomorrow, the main trends
• Adding biochemical sensors to physiological
measurements
• From monitoring single parameter to multiple
parameters
• Adding actuation capability to sensing and
monitoring (closing the loop)
• Towards fully autonomous system (energy,
communication, actuation)
• Towards implementing plastic electronics
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BIOTEX as part of an instrumented textile roadmap
• Current developments are
mainly focused on physiological
measurements with first
applications targeting sport
monitoring and prevention of
cardiovascular risk
• Biochemical measurements
of on-body fluids are needed
to tackle very important health
and safety issues
• European co-financed FP6
STREP project started in
September 2005 and lasting 30
months
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Hydrogel Opal Sensors
• Hydrogel inverse opal : 3D mesoporous ordered
hydrogel structure using a polystyrene opal
template
• Measurable shift in the diffracted wavelength
with swelling of the hydrogel inverse opal
Air
pH2
• Reversible swelling of antigen-responsive
hydrogel (competitive immunoassay)
pH7
• Connection of the sensor to a
spectrophotometer and incorporation into a
textile for wound healing monitoring
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Protection e-textiles, micro-nano
structured fiber systems for
emergency-disaster wear
• Textile and fiber-based integrated
smart wearables for emergency
disaster intervention personnel
• Improvement of safety, coordination
and efficiency of professionals
• Optimization of survivor
management
• European co-financed FP6 IP project
started in February 2006 and lasting
48 months
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Source: Penelope
Plastic Optical Fibers integrated in the fabrics
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Thank you for your attention.