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TUTORIAL Introduction to Piezoelectric Sensors

TUTORIAL Introduction to Piezoelectric Sensors

Definition of

Definition of PiezoelectricityPiezoelectricity is the ability of some materials (notablycrystals and certain ceramics) to generated an electricalpotential in response to applied mechanical stress. Thismay take the form of a separation of electric chargeacross the crystal lattice. If the material is not shortcircuited,the applied charge induces a voltage across thematerial. The word is derive from the Greek wordpiezien, which means to squeeze or press.Dytran Instruments, Inc. 20

What is a Piezoelectric Transducer?• A transducer converts one form of energy into another‒ In the case of piezoelectric transducer the transduction is frommechanical energy to electrical energy• The prefix “piezo” is a Greek word meaning “to squeeze”• Materials that produce an electric charge when a force isapplied to them exhibit what is known as thepiezoelectric effect• Many piezoelectric materials are known toexist‒ Quartz, tourmaline, ceramic (PZT), GAPO4 andmany othersDytran Instruments, Inc.21

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