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Opo: a wearable sensor for capturing high-fidelity face-to-face interactions

Authors:

Prabal DuttaAuthors Info & Claims

SenSys '14: Proceedings of the 12th ACM Conference on Embedded Network Sensor Systems

Pages 61 - 75

https://doi.org/10.1145/2668332.2668338

Published: 03 November 2014 Publication History

Abstract

Currently, researchers study face-to-face interactions using wearable sensors and smartphones which provide 2 to 5 m proximity sensing every 20 to 300 s. However, studying interaction distance, which is known to impact disease spread, communication behavior, and other phenomenon, has proven challenging. Smartphones are limited by their inaccurate and/or impractical ranging capabilities, while wearable sensors are limited by their need for infrastructure nodes, bulkiness, and/or inaccurate ranging. To address these challenges, we present Opo, a 14 cm², 11.4 g "lapel pin" built from commercial components. Opo sensors range neighbors every 2 s up to 2 m away with 5% average error, all while requiring zero infrastructure and improving upon current wearable sensors' accuracy and power usage. The cornerstone of Opo is an ultrasonic wakeup circuit that draws 19 μA when no neighbors are present. This enables Opo sensors to discover and range neighbors without the need for infrastructure nodes and slow or power-hungry RF discovery protocols. Thus, Opo is able to sense interaction distance with high accuracy (5 cm) and temporal fidelity (2 s) on a limited power budget.

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Index Terms

Opo: a wearable sensor for capturing high-fidelity face-to-face interactions
1. Hardware
  1. Communication hardware, interfaces and storage

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Published In

cover image ACM Conferences

SenSys '14: Proceedings of the 12th ACM Conference on Embedded Network Sensor Systems

November 2014

380 pages

ISBN:9781450331432

DOI:10.1145/2668332

General Chair:
Ákos Lédecz
Vanderbilt University
,
Program Chairs:
Prabal Dutta
University of Michigan
,
Chenyang Lu
Washington Univ. in St. Louis

Copyright © 2014 Owner/Author.

Permission to make digital or hard copies of part or all of this work for personal or classroom use is granted without fee provided that copies are not made or distributed for profit or commercial advantage and that copies bear this notice and the full citation on the first page. Copyrights for third-party components of this work must be honored. For all other uses, contact the Owner/Author.

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Published: 03 November 2014

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SenSys '14

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SenSys '14: The 12th ACM Conference on Embedded Network Sensor Systems

November 3 - 6, 2014

Tennessee, Memphis

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https://dl.acm.org/doi/10.1145/3613904.3642295
Sabbella HWeerakoon DGulati MMisra A(2024)PA2BLO: Low-Power, Personalized Audio Badge2024 IEEE International Conference on Pervasive Computing and Communications (PerCom)10.1109/PerCom59722.2024.10494427(154-163)Online publication date: 11-Mar-2024
https://doi.org/10.1109/PerCom59722.2024.10494427
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