Integration of capillaric strain sensors toward recognition of human movements

Gasvoda, Hudson; Cmager, Nick; Altay, Rana; Lee, Ju Young; Araci, Ismail Emre

doi:10.1039/d2sd00201a

Sens. Diagn.

2023

DOI: 10.1039/d2sd00201a

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Integration of capillaric strain sensors toward recognition of human movements

Hudson Gasvoda

Nick Cmager

Rana Altay

et al.

Abstract: Capillaric strain sensors (CSS) operate based on the volume expansion of closed microfluidic networks in response to linear strain and have tunable directionality and sensitivity in a large range. The...

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2024

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Human Activity Recording Based on Skin-Strain-Actuated Microfluidic Pumping in Asymmetrically Designed Micro-Channels

Askar,

Cmager,

Altay

et al. 2024

Sensors

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The capability to record data in passive, image-based wearable sensors can simplify data readouts and eliminate the requirement for the integration of electronic components on the skin. Here, we developed a skin-strain-actuated microfluidic pump (SAMP) that utilizes asymmetric aspect ratio channels for the recording of human activity in the fluidic domain. An analytical model describing the SAMP’s operation mechanism as a wearable microfluidic device was established. Fabrication of the SAMP was achieved using soft lithography from polydimethylsiloxane (PDMS). Benchtop experimental results and theoretical predictions were shown to be in good agreement. The SAMP was mounted on human skin and experiments conducted on volunteer subjects demonstrated the SAMP’s capability to record human activity for hundreds of cycles in the fluidic domain through the observation of a stable liquid meniscus. Proof-of-concept experiments further revealed that the SAMP could quantify a single wrist activity repetition or distinguish between three different shoulder activities.

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Human Activity Recording Based on Skin-Strain-Actuated Microfluidic Pumping in Asymmetrically Designed Micro-Channels

Askar,

Cmager,

Altay

et al. 2024

Sensors

View full text Add to dashboard Cite

show abstract

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Integration of capillaric strain sensors toward recognition of human movements

Abstract: Capillaric strain sensors (CSS) operate based on the volume expansion of closed microfluidic networks in response to linear strain and have tunable directionality and sensitivity in a large range. The...

Cited by 1 publication

References 62 publications

Human Activity Recording Based on Skin-Strain-Actuated Microfluidic Pumping in Asymmetrically Designed Micro-Channels

Human Activity Recording Based on Skin-Strain-Actuated Microfluidic Pumping in Asymmetrically Designed Micro-Channels

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