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Author

Sim, Sung-Han
Smart Infrastructure Systems Lab
Research Interests
  • Smart Sensor and Sensor Network, Structural Health Monitoring, Digital Image Processing

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Development of a wireless displacement measurement system using acceleration responses

Cited 3 times inthomson ciCited 2 times inthomson ci
Title
Development of a wireless displacement measurement system using acceleration responses
Author
Park, Jang-WoongSim, Sung-HanJung, Hyung-JoBillie Jr, Spencer
Keywords
Acceleration transducers; Bridge displacement; Displacement; Displacement estimation; Displacement information; Engineering applications; Structural health monitoring (SHM); Wireless smart sensors
Issue Date
201307
Publisher
MDPI AG
Citation
SENSORS, v.13, no.7, pp.8377 - 8392
Abstract
Displacement measurements are useful information for various engineering applications such as structural health monitoring (SHM), earthquake engineering and system identification. Most existing displacement measurement methods are costly, labor-intensive, and have difficulties particularly when applying to full-scale civil structures because the methods require stationary reference points. Indirect estimation methods converting acceleration to displacement can be a good alternative as acceleration transducers are generally cost-effective, easy to install, and have low noise. However, the application of acceleration-based methods to full-scale civil structures such as long span bridges is challenging due to the need to install cables to connect the sensors to a base station. This article proposes a low-cost wireless displacement measurement system using acceleration. Developed with smart sensors that are low-cost, wireless, and capable of on-board computation, the wireless displacement measurement system has significant potential to impact many applications that need displacement information at multiple locations of a structure. The system implements an FIR-filter type displacement estimation algorithm that can remove low frequency drifts typically caused by numerical integration of discrete acceleration signals. To verify the accuracy and feasibility of the proposed system, laboratory tests are carried out using a shaking table and on a three storey shear building model, experimentally confirming the effectiveness of the proposed system.
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DOI
http://dx.doi.org/10.3390/s130708377
ISSN
1424-8220
Appears in Collections:
UEE_Journal Papers
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