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Piezoelectric sensor based on electret thermoforming technology: a new industrial process

Grant number: 06/05528-0
Support type:Scholarships in Brazil - Master
Effective date (Start): March 01, 2007
Effective date (End): February 28, 2009
Field of knowledge:Engineering - Electrical Engineering
Principal researcher:Ruy Alberto Corrêa Altafim
Grantee:Daniel Rodrigo Falconi
Home Institution: Escola de Engenharia de São Carlos (EESC). Universidade de São Paulo (USP). São Carlos , SP, Brazil


The piezoelectric sensors with polymer Teflon FEP®, based on term-formed electrets technology, are elements that can compete in price and functionality with ceramic and crystal piezoelectric sensors. Electrets Teflon FEP®'S are generally elements analogous to magnets, that retains electric charge for long periods, sometimes for hundreds of years. In the Brazilian technology , the process of production of those piezoelectric sensor is manual and handmade gone back to prototypes laboratoriais. Those prototypes present high piezoelectric coefficients, superiors to 300 pC/N. Those excellent results indicate the possibility to develop prototypes and procedures for its production in industrial scale and, consequently, to enlarge its range of commercial applications. Among those applications, there are presence sensor, slim keyboards, scales dynamics and sensor of pressure in enviromental contends insulating oils, similar to tanks of transformers. In this context, the proposed work seeks to develop new techniques of production of piezoelectric polymer sensors with term-formed electrets.

Academic Publications
(References retrieved automatically from State of São Paulo Research Institutions)
FALCONI, Daniel Rodrigo. Sensor piezelétrico baseado na tecnologia dos eletretos termo-formados: aprimoramentos dos processos de produção. 2010. Master's Dissertation - Universidade de São Paulo (USP). Escola de Engenharia de São Carlos São Carlos.

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