Parametric Foam-Like Capacitive Sensors for 3D Printing of Deformable Parts with Sensing Capabilities
Résumé
Additive manufacturing paves the way for augmenting parts with sensors fabricated in-situ, i.e. directly within the part, using functional materials deposited at the same time as the structural materials. However, achieving this goal at low cost remains challenging. This paper investigates the design of parametric capacitive sensors that can be embedded in complex designs. The sensors can be manufactured on multi-material extrusion 3D printers using commercially available non-conductive and conductive thermoplastic polyurethane. The proposed sensor consists of a parameterized foam-like structure sandwiched between two conductive plates. This allows the designer to tune both the mechanical and capacitive responses of the sensor. The effect of changing the parameters of the foam-like structure on the sensor behavior is investigated. The parametric sensors are embedded in complex parts, creating a pressure-sensitive push-button, a gamepad and an analog joystick. Conductive traces and shields are directly integrated within the components, alongside all the structural elements that form the designs. The devices are fully functional immediately after fabrication, requiring no additional processing or assembly.
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Aguilar-Segovia et al. - 2024 - Parametric Foam-Like Capacitive Sensors for 3D Printing of Deformable Parts with Sensing Capabilitie.pdf (16)
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