Fig. 4: On-skin performance of the HDM metaskin.
From: A hyperconformal dual-modal metaskin for well-defined and high-precision contextual interactions
a The wireless sensor system, composed of an analog-to-digital converter (ADC), wireless communication module, and battery, all incorporated into a printed circuit board (PCB) with soft Ecoflex encapsulation. b Strain of thick (40 μm) and thin (10 μm) film substrate under same stretch force. Finite simulation results show that the thin film can capture and. highlight the subtle stretching at the wrinkles, whereas the thick film fails to reflect the strain variation around the wrinkle valleys. c Comparison of configurations between common strain sensor and HDM. meta-skin on finger. Common sensors require distributed arrays to monitor the bending of proximal. interphalangeal joint (PIP) and metacarpophalangeal joint (MCP). d Signal outputs from PIP joint bends at various angles. e Responses of the MCP joint sensor on both left and right movements. f Comparison. between common strain sensor and the HDM meta-skin. Detection of joint movements needs different units. To avoid signal crosstalk in common strain sensor design, whereas thin-film substrate and in-plane. configuration avoid stress interference between regions. Scale bar: 2 cm. g Influence of pressing intensity. on the positioning signals at two different touch positions, showing insensitivity to the light, medium, and heavy force.
