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Open AccessFeature PaperArticle

Design and Realization of an Efficient Large-Area Event-Driven E-Skin

Institute for Cognitive Systems (ICS), Technische Universität München, Arcisstraße 21, 80333 München, Germany
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Sensors 2020, 20(7), 1965; https://doi.org/10.3390/s20071965
Received: 7 February 2020 / Revised: 26 March 2020 / Accepted: 27 March 2020 / Published: 31 March 2020
(This article belongs to the Special Issue Neuromorphic Computing for Event-Based Sensors and Actuators)
The sense of touch enables us to safely interact and control our contacts with our surroundings. Many technical systems and applications could profit from a similar type of sense. Yet, despite the emergence of e-skin systems covering more extensive areas, large-area realizations of e-skin effectively boosting applications are still rare. Recent advancements have improved the deployability and robustness of e-skin systems laying the basis for their scalability. However, the upscaling of e-skin systems introduces yet another challenge—the challenge of handling a large amount of heterogeneous tactile information with complex spatial relations between sensing points. We targeted this challenge and proposed an event-driven approach for large-area skin systems. While our previous works focused on the implementation and the experimental validation of the approach, this work now provides the consolidated foundations for realizing, designing, and understanding large-area event-driven e-skin systems for effective applications. This work homogenizes the different perspectives on event-driven systems and assesses the applicability of existing event-driven implementations in large-area skin systems. Additionally, we provide novel guidelines for tuning the novelty-threshold of event generators. Overall, this work develops a systematic approach towards realizing a flexible event-driven information handling system on standard computer systems for large-scale e-skin with detailed descriptions on the effective design of event generators and decoders. All designs and guidelines are validated by outlining their impacts on our implementations, and by consolidating various experimental results. The resulting system design for e-skin systems is scalable, efficient, flexible, and capable of handling large amounts of information without customized hardware. The system provides the feasibility of complex large-area tactile applications, for instance in robotics. View Full-Text
Keywords: tactile sensing; e-skin; large-area skin systems; event-driven systems; send-on-delta principle tactile sensing; e-skin; large-area skin systems; event-driven systems; send-on-delta principle
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Bergner, F.; Dean-Leon, E.; Cheng, G. Design and Realization of an Efficient Large-Area Event-Driven E-Skin. Sensors 2020, 20, 1965.

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