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Shock and Vibration
Volume 2015, Article ID 740471, 13 pages
Research Article

A Wireless Strain Sensor Network for Structural Health Monitoring

1Key Laboratory of C&PC Structures, Southeast University, Nanjing 211189, China
2Department of Civil and Environmental Engineering, Harbin Institute of Technology, Shenzhen Graduate School, Shenzhen 518055, China

Received 7 August 2014; Accepted 15 January 2015

Academic Editor: Gangbing Song

Copyright © 2015 Chengyin Liu et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Structural strain under external environmental loads is one of the main monitoring parameters in structural health monitoring or dynamic tests. This paper presents a wireless strain sensor network (WSSN) design for monitoring structural dynamic strain field. A precision strain sensor board is developed and integrated with the IRIS mote hardware/software platform for multichannel strain gauge signal conditioning and wireless monitoring. Measurement results confirm the sensor’s functionality regarding its static and dynamic characterization. Furthermore, in order to verify the functionality of the designed wireless strain sensor for dynamic strain monitoring, a cluster-star network evaluation system is developed for strain modal testing on an experimental steel truss structure. Test results show very good agreement with the finite element (FE) simulations. This paper demonstrates the feasibility of the proposed WSSN for large structural dynamic strain monitoring.