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Inventions 2018, 3(1), 9; https://doi.org/10.3390/inventions3010009

Evaluation of Capacitive Markers Fabricated by 3D Printing, Laser Cutting and Prototyping

Nuremberg Institute of Technology, Keßlerplatz 12, D-90489 Nuremberg, Germany
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Received: 8 December 2017 / Revised: 12 January 2018 / Accepted: 15 January 2018 / Published: 26 January 2018
(This article belongs to the Special Issue Innovations in 3-D Printing)
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Abstract

With Tangible User Interfaces, the computer user is able to interact in a fundamentally different and more intuitive way than with usual 2D displays. By grasping real physical objects, information can also be conveyed haptically, i.e., the user not only sees information on a 2D display, but can also grasp physical representations. To recognize such objects (“tangibles”) it is skillful to use capacitive sensing, as it happens in most touch screens. Thus, real objects can be located and identified by the touch screen display automatically. Recent work already addressed such capacitive markers, but focused on their coding scheme and automated fabrication by 3D printing. This paper goes beyond the fabrication by 3D printers and, for the first time, applies the concept of capacitive codes to laser cutting and another immediate prototyping approach using modeling clay. Beside the evaluation of additional properties, we adapt recent research results regarding the optimized detection of tangible objects on capacitive screens. As a result of our comprehensive study, the detection performance is affected by the type of capacitive signal processing (respectively the device) and the geometry of the marker. 3D printing revealed to be the most reliable technique, though laser cutting and immediate prototyping of markers showed promising results. Based on our findings, we discuss individual strengths of each capacitive marker type. View Full-Text
Keywords: tangible user interface; capacitive; marker; 3D printing; multi-touch; laser cutting; prototyping tangible user interface; capacitive; marker; 3D printing; multi-touch; laser cutting; prototyping
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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MDPI and ACS Style

Kreimeier, J.; Bielmeier, T.; Götzelmann, T. Evaluation of Capacitive Markers Fabricated by 3D Printing, Laser Cutting and Prototyping. Inventions 2018, 3, 9.

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