Developing a microcontrolled structural health monitoring system based on the electromechanical impedance principle

• Grant number: 11/20354-6
• Support Opportunities: Regular Research Grants
• Start date: February 01, 2012
• End date: January 31, 2014
• Field of knowledge: Engineering - Electrical Engineering
• Principal Investigator: Jozue Vieira Filho
• Grantee: Jozue Vieira Filho
• Host Institution: Faculdade de Engenharia (FEIS). Universidade Estadual Paulista (UNESP). Campus de Ilha Solteira. Ilha Solteira , SP, Brazil

Abstract

Structural health monitoring (SHM) has advanced significantly in recent years, with applications in different areas of engineering. By monitoring structures in real time using dedicated data acquisition system, the maintenance costs in complex structures, whether mechanical or not, can be significantly reduced. Among various techniques available for SHM applications, one that has been successfully exploited is the electromechanical impedance (E / M). These techniques are based on piezoelectric transducers, such as PZT ceramics (Pb-Lead zirconate titanate, lead zirconate titanate). In this type of technique, PZTs bonded on the structure are appropriately excited and their response captured to be analyzed according to the methodology. To assess damage to the structure, the electrical impedance is computed through the frequency response function (FRF), firstly in health condition to generating a set of baselines, and later, in normal operation of the structure. Possible differences are indicative of damage to the monitored structure. The purpose of this work is to innovate and change the paradigm of using the principle of electromechanical impedance based SHM systems, developing a SHM system based on the technique of impedance E/M, but without measuring the Frequency Response Function (FRF) itself. In other words, the system will be based only on the time domain response for detecting variation on the set PZT-Structure. The proposed system will be autonomous and based on a microcontroller. However, it will incorporate an interface that allows communication with computers. (AU)

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

CORTEZ, NICOLAS E.; FILHO, JOZUE V.; BAPTISTA, FABRICIO G.. A new microcontrolled structural health monitoring system based on the electromechanical impedance principle. STRUCTURAL HEALTH MONITORING-AN INTERNATIONAL JOURNAL, v. 12, n. 1, p. 14-22, JAN 2013. (11/20354-6)

CORTEZ, NICOLAS E.; VIEIRA FILHO, JOZUE; BAPTISTA, FABRICIO G.. Design and implementation of wireless sensor networks for impedance-based structural health monitoring using ZigBee and Global System for Mobile Communications. Journal of Intelligent Material Systems and Structures, v. 26, n. 10, p. 1207-1218, JUL 2015. (11/20354-6)

PITA, J. L.; TURRA, A. E.; FILHO, J. V.; CHANG, FK. Leakage Detection in Water Pipe Networks Using Electromechanical Impedance (EMI) Based Technique. STRUCTURAL HEALTH MONITORING 2013, VOLS 1 AND 2, v. N/A, p. 2-pg., 2013-01-01. (11/20354-6)