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A precise embedded curvature sensor module for soft-bodied robots
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DOI：10.1016/j.sna.2015.09.041.png)
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Abstract
En 中文
As an emerging field, soft-bodied robots require profoundly different approaches to sensing and actuation compared to their rigid-bodied counterparts. Electro-mechanical design, fabrication, and operational challenges due to material elasticity significantly complicate embedded, modular and precise proprioceptive feedback. This work presents a novel curvature sensor module to address the unique soft robotic specifications. The proposed device utilizes a magnet and an electronic Hall effect sensing component to accurately measure curvatures on a soft-bodied bending segment on a flexible circuit board, ensuring contact-free sensing. We verify performance of sensor modules on static and dynamic bending deformations based on a single initial calibration step. To the best of our knowledge, the presented device is the first modular and integrated soft-bodied sensor design that is demonstrated to be accurate up to 7.5 Hz with a root mean square error of 0.023 cm(-1) between measured and actual curvature without filtering out the intrinsic noise, and available for use with soft-bodied kinematic bending chains. (C) 2015 Elsevier B.V. All rights reserved.
Keywords:
Soft robots
Curvature sensor
Hall effect
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