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Journal of Intelligent Material Systems and Structures, Vol. 19, No. 3, 387-394 (2008)
DOI: 10.1177/1045389X07084756

Self-powered Wireless Health Monitoring Supplied by Synchronized Switch Harvesting (SSH) Method

K. Yuse

LGEF, INSA Lyon, rue de la physique, 69621 Villeurbanne, France, kaori.yuse{at}insa-lyon.fr

T. Monnier

LGEF, INSA Lyon, rue de la physique, 69621 Villeurbanne, France

L. Petit

LGEF, INSA Lyon, rue de la physique, 69621 Villeurbanne, France

E. Lefeuvre

LGEF, INSA Lyon, rue de la physique, 69621 Villeurbanne, France

C. Richard

LGEF, INSA Lyon, rue de la physique, 69621 Villeurbanne, France

D. Guyomar

LGEF, INSA Lyon, rue de la physique, 69621 Villeurbanne, France

The development of autonomous wireless sensors and actuators in order to design advanced structural health monitoring (SHM) systems is an exciting challenge for both the industrial and the academic communities. Some studies have dealt with the implementation of wireless devices. Almost all the studies about so-called autonomous systems today still require power supply. It means that a fully self-powered system has not been achieved yet. The present study shows the design of self-powered wireless health monitoring system, for which the energy is supplied by the original method called the synchronized switch harvesting (SSH) method. The piezoelectric elements and electrical circuit, located on the vibrating structure, harvest electrical energy from the direct conversion of mechanical energy vibration. Lamb wave transmission is chosen for the SHM of a composite beam of length around 30 cm. Some piezoelectric elements, used for energy harvesting and signal transmission, are located on the beam. The energy required to wake-up the micro-controller and to achieve two complete transmission cycles is only 1.5mJ. This small amount of energy can be harvested in a short time period for reasonable beam displacement levels. The study details the different trade-off concerning such a self-powered health monitoring device.

Key Words: piezoelectric • health monitoring • energy harvesting • wireless.


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