alex casson, university of manchester presentation at health-tech innovation labs conference...
TRANSCRIPT
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Wearable sensors
[Neurosky] [TomTom] [IMEC] [[Nike]]
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Power consumptionIncreasing performance, functionality
Multi-day use and re-use
[Wearable][IMEC][g.tec] [Cognionics] [Enobio] [Mindo]
“Killer” appsMore devices
Increasing user benefits
Keeping them on
Challenges
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Online signal processing
[Chen et al., Wearable sensors, 2014]
Reduce system power. Increase functionality. Better quality recordings. Minimise system latency.
Reduce amount of data to analyse. Reliable operation over unreliable wireless. Enable closed loop: recording – stimulation. Data redaction for privacy.
Case study: Compression
1cm
[Imtiaz et al., IEEE T-BME, 2014]5
Case study: Low power
Power Supply Voltage: 1 VCurrent Consumption: 1.3 nA
420 µm
6[Casson et al., EL, 2014]
Standard electrodes
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Clinical gold standard. Very good signals. Easy to apply.
o Difficult to take off. o Not for chronic recordings. o Not personalizable.
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Contact noise, impedance Half cell potential, baseline wander
Technical challenges
Comfort, attachment durationFunctional performance
Motion artefact: shape, frequencyCost, ease of manufacture, personalisation
Our electrodes: printed
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Standard
Printed copper
Tattoo
Copper on acetate. Very flexible.o No built in adhesion.
Silver nanoparticles on tattoo paper. Adhesion under whole surface. Thin (~10 μm) separation from skin.
Aim: Printed, easily customisable
[Batchelor et al., EMBC, 2015]
Signal quality
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“Killer” apps
?
“Killer” apps?
Epilepsy diagnosis Seizure prediction / treatment Sleep disorder diagnosis Stroke rehabilitation Alzheimer’s diagnosis Alzheimer’s progression tracking Brain-computer interfaces Workload monitoring Wheelchair control Prosthetics control Emotion detection Affective computing Augmented cognition
$5 billion2012
$13.6 billion2019
[Transparency market research, 2013]
Next generation wearables
1. Application design
2. Algorithm design
3. Performance testing design
4. Circuit design@a_casson
[email protected]/sisp