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Dynamic Metasurface Aperture as Smart Around-the-Corner Motion Detector

Detecting and analysing motion is a key feature of Smart Homes and the connected sensor vision they embrace. At present, most motion sensors operate in line-of-sight Doppler shift schemes. Here, we propose an alternative approach suitable for indoor environments, which effectively constitute disorde...

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Autores principales: del Hougne, Philipp, F. Imani, Mohammadreza, Sleasman, Timothy, Gollub, Jonah N., Fink, Mathias, Lerosey, Geoffroy, Smith, David R.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5916952/
https://www.ncbi.nlm.nih.gov/pubmed/29695810
http://dx.doi.org/10.1038/s41598-018-24681-9
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author del Hougne, Philipp
F. Imani, Mohammadreza
Sleasman, Timothy
Gollub, Jonah N.
Fink, Mathias
Lerosey, Geoffroy
Smith, David R.
author_facet del Hougne, Philipp
F. Imani, Mohammadreza
Sleasman, Timothy
Gollub, Jonah N.
Fink, Mathias
Lerosey, Geoffroy
Smith, David R.
author_sort del Hougne, Philipp
collection PubMed
description Detecting and analysing motion is a key feature of Smart Homes and the connected sensor vision they embrace. At present, most motion sensors operate in line-of-sight Doppler shift schemes. Here, we propose an alternative approach suitable for indoor environments, which effectively constitute disordered cavities for radio frequency (RF) waves; we exploit the fundamental sensitivity of modes of such cavities to perturbations, caused here by moving objects. We establish experimentally three key features of our proposed system: (i) ability to capture the temporal variations of motion and discern information such as periodicity (“smart”), (ii) non line-of-sight motion detection, and (iii) single-frequency operation. Moreover, we explain theoretically and demonstrate experimentally that the use of dynamic metasurface apertures can substantially enhance the performance of RF motion detection. Potential applications include accurately detecting human presence and monitoring inhabitants’ vital signs.
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spelling pubmed-59169522018-04-30 Dynamic Metasurface Aperture as Smart Around-the-Corner Motion Detector del Hougne, Philipp F. Imani, Mohammadreza Sleasman, Timothy Gollub, Jonah N. Fink, Mathias Lerosey, Geoffroy Smith, David R. Sci Rep Article Detecting and analysing motion is a key feature of Smart Homes and the connected sensor vision they embrace. At present, most motion sensors operate in line-of-sight Doppler shift schemes. Here, we propose an alternative approach suitable for indoor environments, which effectively constitute disordered cavities for radio frequency (RF) waves; we exploit the fundamental sensitivity of modes of such cavities to perturbations, caused here by moving objects. We establish experimentally three key features of our proposed system: (i) ability to capture the temporal variations of motion and discern information such as periodicity (“smart”), (ii) non line-of-sight motion detection, and (iii) single-frequency operation. Moreover, we explain theoretically and demonstrate experimentally that the use of dynamic metasurface apertures can substantially enhance the performance of RF motion detection. Potential applications include accurately detecting human presence and monitoring inhabitants’ vital signs. Nature Publishing Group UK 2018-04-25 /pmc/articles/PMC5916952/ /pubmed/29695810 http://dx.doi.org/10.1038/s41598-018-24681-9 Text en © The Author(s) 2018 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
del Hougne, Philipp
F. Imani, Mohammadreza
Sleasman, Timothy
Gollub, Jonah N.
Fink, Mathias
Lerosey, Geoffroy
Smith, David R.
Dynamic Metasurface Aperture as Smart Around-the-Corner Motion Detector
title Dynamic Metasurface Aperture as Smart Around-the-Corner Motion Detector
title_full Dynamic Metasurface Aperture as Smart Around-the-Corner Motion Detector
title_fullStr Dynamic Metasurface Aperture as Smart Around-the-Corner Motion Detector
title_full_unstemmed Dynamic Metasurface Aperture as Smart Around-the-Corner Motion Detector
title_short Dynamic Metasurface Aperture as Smart Around-the-Corner Motion Detector
title_sort dynamic metasurface aperture as smart around-the-corner motion detector
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5916952/
https://www.ncbi.nlm.nih.gov/pubmed/29695810
http://dx.doi.org/10.1038/s41598-018-24681-9
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