IndexMo: exploring finger-worn RFID motion tracking for activity recognition on tagged objects

Rong Hao Liang, Shun Yao Yang, Bing Yu Chen

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

Abstract

This work explores and evaluates the designs of finger-worn radio-frequency identification (RFID) motion tracking for activity recognition on tagged objects. We propose an index-finger-worn device that consists of a short-range (∼2cm) RFID reader and a pair of two inertial measurement units (IMUs), which are mounted at the locations where an artificial nail and a ring are worn. The short-range RFID reader recognizes the tagged object on finger touch, and then the IMU data are used for activity recognition. Data collected from the user of this device allows for a post-hoc analysis, which informs the activity recognition performance in various RFID+IMU and IMU-only configurations on the same task. The results of a ten-participant user study show that when the objects have similar physical form factors, the hybrid RFID motion tracking significantly outperforms the IMU-only tracking, especially in a larger-number set of objects. In our test, three IMU configurations (i.e., NailOnly, RingOnly, and Nail+Ring) achieved comparable action recognition performances, i.e., ≥90% accuracy, with 500 ms recognition time, though the NailOnly RFID+IMU configuration provided the highest wearability. The practical challenges toward a real-world deployment of a finger-worn RFID motion tracking system are also discussed.

Original languageEnglish
Title of host publicationISWC 2019 - Proceedings of the 2019 ACM International Symposium on Wearable Computers
Place of PublicationNew York
PublisherAssociation for Computing Machinery, Inc
Pages129-134
Number of pages6
ISBN (Electronic)978-1-4503-6870-4
DOIs
Publication statusPublished - 9 Sep 2019
Event23rd International Symposium on Wearable Computers, ISWC 2019 - London, United Kingdom
Duration: 9 Sep 201913 Sep 2019

Conference

Conference23rd International Symposium on Wearable Computers, ISWC 2019
CountryUnited Kingdom
CityLondon
Period9/09/1913/09/19

Keywords

  • Activity recognition
  • Finger-worn device
  • Motion tracking
  • Nail-mounted device
  • RFID

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  • Cite this

    Liang, R. H., Yang, S. Y., & Chen, B. Y. (2019). IndexMo: exploring finger-worn RFID motion tracking for activity recognition on tagged objects. In ISWC 2019 - Proceedings of the 2019 ACM International Symposium on Wearable Computers (pp. 129-134). New York: Association for Computing Machinery, Inc. https://doi.org/10.1145/3341163.3347724