Multimetric Event-driven System for Long-Term Wireless Sensor Operation in SHM Application
| Autor: | Sarwar, Muhammad Zohaib, Saleem, Muhammad Rakeh, Park, Jong-Woong, Moon, Do-Soo, Kim, Dong Joo |
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| Rok vydání: | 2019 |
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| Druh dokumentu: | Working Paper |
| Popis: | Wireless sensor networks (WSNs) are promising solutions for large infrastructure monitoring because of their ease of installation, computing and communication capability, and cost-effectiveness. Long-term structural health monitoring (SHM), however, is still a challenge because it requires continuous data acquisition for the detection of random events such as earthquakes and structural collapse. To achieve long-term operation, it is necessary to reduce the power consumption of sensor nodes designed to capture random events and, thus, enhance structural safety. In this paper, we present an event-based sensing system design based on an ultra-low-power microcontroller with a programmable event-detection mechanism to allow continuous monitoring; the device is triggered by vibration, strain, or a timer and has a programmed threshold, resulting in ultra-low-power consumption of the sensor node. Furthermore, the proposed system can be easily reconfigured to any existing wireless sensor platform to enable ultra-low power operation. For validation, the proposed system was integrated with a commercial wireless platform to allow strain, acceleration, and time-based triggering with programmed thresholds and current consumptions of 7.43 and 0.85 mA in active and inactive modes, respectively. Comment: 10 pages, 9 figures, 3 Tables, Journal paper |
| Databáze: | arXiv |
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