Grid-based spatially-resolved strain measurement in highly stretchable conductive elastomers
Sprache des Vortragstitels:
Englisch
Original Tagungtitel:
XXXVII. Messtechnisches Symposium 2024
Sprache des Tagungstitel:
Englisch
Original Kurzfassung:
This work addresses a grid-based approachto spatially resolved strain measurement with a fiber-elastomer composite. The grid-based method uses a net-work of conductive textile electrodes embedded in a softelastomer matrix to detect strain through changes in elec-trical resistance. In contrast to electrical impedance to-mography, which is challenging to use considering largedeformation and consequently moving electrodes, grid-based approaches are more resistant to changing boundaryconditions. However, the cross-talk between electrodes isdisadvantageous. Therefore, an application-specific elec-tronic system based on the zero potential circuit (ZPC)method is implemented. This drastically reduces cross-talk while allowing for short acquisition times. The simpleelectrode configuration and direct resistance measurementmethod of the grid-based system provides a straightfor-ward yet effective way to capture strain or pressure and istherefore particularly suitable for applications requiringspatial resolution and robustness under various mechanicalconditions. The electronics are set up to allow evaluationof fiber-elastomer composites with varying levels of con-ductivity or sensing geometries during high strain tensiletesting.
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