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Wearable strain sensor integrating mechanoluminescent fiber with a flexible printed circuit

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Abstract

This paper reports an optical strain sensor that integrates a self-powered mechanoluminescent (ML) elastic fiber with a flexible circuit. The inclusion of an alumina nanoparticle as the additive results in seven-fold enhancement of ML intensity while maintaining flexibility of 120% strain. The sensor facilitates the detection of strain and stretching speed. It attains a sensitivity of 0.0022 lx/(1% strain) and a resolution of 0.2% strain, respectively. We have successfully applied it to detect bending motions of the finger, wrist, and elbow. This wearable strain sensor holds promise for diverse applications in wearable technology.

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Supplementary Material (3)

NameDescription
Visualization 1       The mechanoluminescent effect testing.
Visualization 2       Optical strain sensor testing on finger bending using camera.
Visualization 3       Optical strain sensor testing on finger bending using a flexible printed circuit.

Data availability

Data underlying the results presented in this paper are not publicly available at this time but may be obtained from the authors upon reasonable request.

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