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24 Φεβ 2012 · Key learnings: Piezoelectric Transducer Definition: A piezoelectric transducer is a device that converts physical pressures like force or acceleration into an electric charge. Working Principle: The piezoelectric effect allows these transducers to generate voltage when mechanical stress is applied, which is then used to measure that stress.
ABSTRACT. Piezoelectric elements are used to construct transducers for a vast number of different applications. Piezoelectric materials generate an electrical charge in response to mechanical movement, or vice versa, produce mechanical movement in response to electrical input.
Figure 1.1 (a) The direct piezoelectric effect provides an electric charge upon application of a mechanical stress, whereas (b) the converse piezoelectric effect describes the situation where strain develops under an applied electric field.
Figure 1. The direct piezoelectric effect. Conversely, when a piezoelectric crystal is placed in an electric field, or when charges are applied by external means to its faces, the crystal exhibits strain, i.e. the dimensions of the crystal change.
Piezoelectricity is extensively utilized in the fabrication of various devices such as transducers, actuators, surface acoustic wave devices, frequency control and so on. In this chapter we describe the piezoelectric materials that are used, and various potential applications of piezoelectric materials.1-4) 1.
Basic concepts of piezoelectricity are presented in Chap. 1 along with an introduction into the field of microgravimetric sensors; appendices A and B, at the end of the book, include fundamental concepts of electrostatics
New understandings underlying the principles of Piezoelectric Transducers, new technological advances in its applications, and new areas of utility for these transducers made a second edition of this book inevitable.
