mmVib
| Autor: | Shuai Li, Chengkun Jiang, Yuan He, Meng Jin, Yunhao Liu, Junchen Guo |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Computer science
Acoustics 0206 medical engineering Work (physics) 020206 networking & telecommunications 02 engineering and technology 020601 biomedical engineering Measure (mathematics) law.invention Vibration Amplitude law Consistency (statistics) Extremely high frequency Micrometer 0202 electrical engineering electronic engineering information engineering Radar |
| Zdroj: | MobiCom |
| DOI: | 10.1145/3372224.3419202 |
| Popis: | Vibration measurement is a crucial task in industrial systems, where vibration characteristics reflect the health and indicate anomalies of the objects. Previous approaches either work in an intrusive manner or fail to capture the micrometer-level vibrations. In this work, we propose mmVib, a practical approach to measure micrometer-level vibrations with mmWave radar. By introducing a Multi-Signal Consolidation (MSC) model to describe the properties of the reflected signals, we exploit the inherent consistency among those signals to accurately recover the vibration characteristics. We implement a prototype of mmVib, and the experiments show that this design achieves 8.2% relative amplitude error and 0.5% relative frequency error in median. Typically, the median amplitude error is 3.4um for the 100um-amplitude vibration. Compared to two existing approaches, mmVib reduces the 80th-percentile amplitude error by 62.9% and 68.9% respectively. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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