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Smart Structures and Systems Volume 5, Number 2, March 2009 , pages 119-137 DOI: https://doi.org/10.12989/sss.2009.5.2.119 |
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Middleware services for structural health monitoring using smart sensors |
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T. Nagayama, B. F. Spencer, Jr., K. A. Mechitov and G. A. Agha
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| Abstract | ||
| Smart sensors densely distributed over structures can use their computational and wireless communication capabilities to provide rich information for structural health monitoring (SHM). Though smart sensor technology has seen substantial advances during recent years, implementation of smart sensors on full-scale structures has been limited. Hardware resources available on smart sensors restrict data acquisition capabilities; intrinsic to these wireless systems are packet loss, data synchronization errors, and relatively slow communication speeds. This paper addresses these issues under the hardware limitation by developing corresponding middleware services. The reliable communication service requires only a few acknowledgement packets to compensate for packet loss. The synchronized sensing service employs a resampling approach leaving the need for strict control of sensing timing. The data aggregation service makes use of application specific knowledge and distributed computing to suppress data transfer requirements. These middleware services are implemented on the Imote2 smart sensor platform, and their efficacy demonstrated experimentally. | ||
| Key Words | ||
| structural health monitoring, smart sensor, middleware services, synchronized sensing, reliable communication. | ||
| Address | ||
| T. Nagayama; Department of Civil Engineering, University of Tokyo 7-3-1, Hongo, Bunkyo-ku, Tokyo 113-8656, Japan B. F. Spencer, Jr.; Department of Civil Engineering, University of Illinois at Urbana-Champaign 205 N. Mathews Ave. Urbana, Illinois 61801, USA K. A. Mechitov and G. A. Agha; Department of Computer Science, University of Illinois at Urbana-Champaign 201 N. Goodwin Ave. Urbana, Illinois 61801, USA | ||