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Sensors 2017, 17(12), 2880;

Active Wireless System for Structural Health Monitoring Applications

Department of Mechanical Engineering, Technical University of Madrid, 28006 Madrid, Spain
Department of Construction and Manufacturing Engineering, University of Oviedo, Campus de Gijón, 33203 Gijón, Spain
Author to whom correspondence should be addressed.
Received: 14 November 2017 / Revised: 4 December 2017 / Accepted: 8 December 2017 / Published: 11 December 2017
(This article belongs to the Special Issue Sensors and Sensor Networks for Structural Health Monitoring)
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The use of wireless sensors in Structural Health Monitoring (SHM) has increased significantly in the last years. Piezoelectric-based lead zirconium titanate (PZT) sensors have been on the rise in SHM due to their superior sensing abilities. They are applicable in different technologies such as electromechanical impedance (EMI)-based SHM. This work develops a flexible wireless smart sensor (WSS) framework based on the EMI method using active sensors for full-scale and autonomous SHM. In contrast to passive sensors, the self-sensing properties of the PZTs allow interrogating with or exciting a structure when desired. The system integrates the necessary software and hardware within a service-oriented architecture approach able to provide in a modular way the services suitable to satisfy the key requirements of a WSS. The framework developed in this work has been validated on different experimental applications. Initially, the reliability of the EMI method when carried out with the proposed wireless sensor system is evaluated by comparison with the wireless counterpart. Afterwards, the performance of the system is evaluated in terms of software stability and reliability of functioning. View Full-Text
Keywords: wireless smart sensor network; PZT sensors; electromechanical impedance method; Structural Health Monitoring wireless smart sensor network; PZT sensors; electromechanical impedance method; Structural Health Monitoring

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Perera, R.; Pérez, A.; García-Diéguez, M.; Zapico-Valle, J.L. Active Wireless System for Structural Health Monitoring Applications. Sensors 2017, 17, 2880.

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