On Mechanical and Electrical Coupling Determination at Piezoelectric Harvester by Customized Algorithm Modeling and Measurable Properties

Sensors

Carlos Bernal¹  Irene Perez-Alfaro²  Nieves Murillo²  Daniel Gil-Hernandez² 

[1] Electronics Engineering and Communication Department, Universidad de Zaragoza, Pedro Cerbuna 12, E-50009 Zaragoza, Spain;TECNALIA, Basque Research and Technology Alliance (BRTA), P° Mikeletegi 7, E-20009 Donostia-San Sebastian, Spain;

关键词: energy harvesting;    PZT;    modeling;    algorithm;    harvester design;    electromechanical;   

DOI  :  10.3390/s22083080

来源: DOAJ

【 摘 要 】

Piezoelectric harvesters use the actuation potential of the piezoelectric material to transform mechanical and vibrational energies into electrical power, scavenging energy from their environment. Few research has been focused on the development and understanding of the piezoelectric harvesters from the material themselves and the real piezoelectric and mechanical properties of the harvester. In the present work, the authors propose a behavior real model based on the experimentally measured electromechanical parameters of a homemade PZT bimorph harvester with the aim to predict its V_rms output. To adjust the harvester behavior, an iterative customized algorithm has been developed in order to adapt the electromechanical coupling coefficient, finding the relationship between the harvester actuator and generator behavior. It has been demonstrated that the harvester adapts its elongation and its piezoelectric coefficients combining the effect of the applied mechanical strain and the electrical behavior as a more realistic behavior due to the electromechanical nature of the material. The complex rms voltage output of the homemade bimorph harvester in the frequency domain has been successfully reproduced by the proposed model. The Behavior Real Model, BRM, developed could become a powerful tool for the design and manufacturing of a piezoelectric harvester based on its customized dimensions, configuration, and the piezoelectric properties of the smart materials.

【 授权许可】

Unknown