Distributed Sensor Networks Deployed Using Soft Growing Robots
Alexander M. Gruebele, Andrew C. Zerbe, Margaret M. Coad, Allison M., Okamura, Mark R. Cutkosky

TL;DR
This paper introduces a novel sensor integration method for soft growing robots, enabling environmental sensing and shape estimation in confined spaces, thereby enhancing their functionality and safety.
Contribution
It presents a new approach using flexible printed circuit boards with embedded sensors and microcontrollers, along with a mathematical model for shape sensing accuracy.
Findings
Successfully relays temperature and humidity data in inaccessible areas.
Develops a shape sensing method with characterized accuracy.
Advances soft robot sensing capabilities.
Abstract
Due to their ability to move without sliding relative to their environment, soft growing robots are attractive for deploying distributed sensor networks in confined spaces. Sensing of the state of such robots would also add to their capabilities as human-safe, adaptable manipulators. However, incorporation of distributed sensors onto soft growing robots is challenging because it requires an interface between stiff and soft materials, and the sensor network needs to undergo significant strain. In this work, we present a method for adding sensors to soft growing robots that uses flexible printed circuit boards with self-contained units of microcontrollers and sensors encased in a laminate armor that protects them from unsafe curvatures. We demonstrate the ability of this system to relay directional temperature and humidity information in hard-to-access spaces. We also demonstrate and…
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