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Proceedings Paper

Smart health monitoring system for a prestressed concrete bridge
Author(s): Xuan Wang; Ming L. Wang; Yang Zhao; Han Chen; Lily L. Zhou
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Paper Abstract

Smart Health Monitoring System (SHMS) is a set of integrated system of hardware and software designed to automatically collect and analyze the data from a faraway bridge. The real-time data can be preprocessed in the sub-workstation on the bridge then transferred to the main server with a wired or wireless internet access. SHMS is based on the statistical analysis of the static and dynamic characteristics of structures. In order to automate the procedure of processing and analyzing all the raw data, a rule-based expert system was developed for the monitoring system with Bootstrap Method. In general, the estimation of parameters from measurement always contains systematic perturbations and random fluctuations. The systematic perturbations mainly come from periodic environmental factors, especially temperature. Random fluctuations result from irregular disturbance including instrumentation sources and numerical processing algorithms. The former can be identified and characterized. Based on the historical data, a set of correction models have been built to remove the influence from systematic perturbations. Random fluctuations are difficult to be characterized by traditional statistical methods. But with Bootstrap Method, we can minimize the random error.

Paper Details

Date Published: 29 July 2004
PDF: 12 pages
Proc. SPIE 5391, Smart Structures and Materials 2004: Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems, (29 July 2004); doi: 10.1117/12.540353
Show Author Affiliations
Xuan Wang, Univ. of Illinois/Chicago (United States)
Ming L. Wang, Univ. of Illinois/Chicago (United States)
Yang Zhao, Univ. of Illinois/Chicago (United States)
Han Chen, Univ. of Illinois/Chicago (United States)
Lily L. Zhou, Nanjing Univ. of Aeronautics and Astronautics (China)

Published in SPIE Proceedings Vol. 5391:
Smart Structures and Materials 2004: Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems
Shih-Chi Liu, Editor(s)

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