Abstract
Traditional vibration inspection systems, equipped with separated sensing and communication modules, are either very expensive (e.g., hundreds of dollars) and/or suffer from occlusion and narrow field of view (e.g., laser). In this work, we present an RFlD-based solution, Tagbeat, to inspect mechanical vibration using COTS RFID tags and readers. Making sense of micro and high-frequency vibration using random and low-frequency readings of tag has been a daunting task, especially challenging for achieving sub-millisecond period accuracy. Our system achieves these three goals by discerning the change pattern of backscatter signal replied from the tag, which is attached on the vibrating surface and displaced by the vibration within a small range. This work introduces three main innovations. First, it shows how one can utilize COTS RFID to sense mechanical vibration and accurately discover its period with a few periods of short and noisy samples. Second, a new digital microscope is designed to amplify the micro-vibration-induced weak signals. Third, Tagbeat introduces compressive reading to inspect high-frequency vibration with relatively low RFID read rate. We implement Tagbeat using a COTS RFID device and evaluate it with a commercial centrifugal machine. Empirical benchmarks with a prototype show that Tagbeat can inspect the vibration period with a mean accuracy of 0.36ms and a relative error rate of 0.03%. We also study three cases to demonstrate how to associate our inspection solution with the specific domain requirements.
Original language | English |
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Title of host publication | Proceedings of the Annual International Conference on Mobile Computing and Networking, MOBICOM |
Publisher | Association for Computing Machinery |
Pages | 16-28 |
Number of pages | 13 |
Volume | 0 |
Edition | 1 |
ISBN (Print) | 9781450342261 |
DOIs | |
Publication status | Published - 3 Oct 2016 |
Event | 22nd Annual International Conference on Mobile Computing and Networking, MobiCom 2016 - New York, United States Duration: 3 Oct 2016 → 7 Oct 2016 |
Conference
Conference | 22nd Annual International Conference on Mobile Computing and Networking, MobiCom 2016 |
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Country/Territory | United States |
City | New York |
Period | 3/10/16 → 7/10/16 |
Keywords
- Backscatter
- RFID
- Sensing
- Vibration
- Wireless
ASJC Scopus subject areas
- Computer Networks and Communications
- Hardware and Architecture
- Software