|
Lecturer(s)
|
-
Mokrý Pavel, prof. Ing. Ph.D.
-
Nosek Jaroslav, prof. Ing. CSc.
|
|
Course content
|
In this subject, there will be given the both theoretical overview and practical experience in the area of selected electric transducers of physical quantities. An accent will be put on the application of smart materials in such systems. Students will acquire the basic concepts of the application of piezoelectric, ferroelectric and piezoresistive materials in electrical transducers, including the practical experience from demonstrations of real experimental systems. Topics of the lectures 1. Sensors and actuators of the advanced mechatronic system. 2. Smart materials and their use for actuators and sensors. 3. Piezoelectric materials. Elastic, piezoelectric and dielectric properties. Material constants. Linear state equations of the piezoelectric material. Applications both of direct and reverse piezoelectric effects. 4.-5.Piezoelectric sensors and their use measuring selected physical quantities (force, pressure, acceleration, vibrations, shocks). Design of piezoelectric sensors. 6. Piezoelectric resonator. Basic modes of vibrations. Longitudinal, radial and thickness-shear vibrations. Simulation of the vibrations. Electric equivalent circuit of the Impedance of the resonator, resonance frequencies. Measurement of the resonance frequency. Design of the resonator. 7. Influences to the resonance frequency. Non-linear effects and their consequencies to the electric circuits. Resonator as a sensor of the physical, chemical and biological quantities. 8. Piezoresistive effect in the non-piezoelectric crystal. Piezoresistive (semiconductor) sensors. Measurement of physical, chemical and biological quantities. Ultrasonic medical imaging. 9. Measurement of the mechanical strain. 10. Intelligent semiconductor sensors. 11. Mikroelectromechanical systems (MEMS). Applications. 12. Measurement of small mechanical displacements by LVDT, capacity sensors and by laser interferometry. 13.-14. Piezoelectric thin films deposited on the Si-substrate and their investigation by laser interferometry. Laboratory practices 1. Direct and inverse piezoelectric effects. Methods of measurements. LVDT sensor and laser interferometry. 2. Measurement of the static mechanical stress. Piezoelectric module g. 3. Electric equivalent circuit. Measurement of the resonance frequency. 4. Determination of the parameters of electric equivalent circuit. Piezoelectric resonator as a bio-sensor. 5. Determination of the selected materiál constants of piezoelectric ceramics. Modal analysis. 6. Temperature dependence of the resonance frequecy. 7. Piezorezistive sensor of mechanical strains. 8. Inteligent semiconductor sensors. 9. Optoelectronic devices and systems. 10. Measurement of selected mechanical quantities. 11. Measurement of the small mechanical displacements (by LVDT). 12. Measurement of the small mechanical displacements (by laser interferometry). 13. SW used in data processing. 14. Credits.
|
|
Learning activities and teaching methods
|
Demonstration of student skills, Lecture
- Class attendance
- 56 hours per semester
- Preparation for exam
- 40 hours per semester
- Home preparation for classes
- 54 hours per semester
|
|
Learning outcomes
|
In this subject, there will be given the both theoretical overview and practical experience in the area of selected electric transducers of physical quantities. An accent will be put on the application of smart materials in such systems. Students will acquire the basic concepts of the application of piezoelectric, ferroelectric and piezoresistive materials in electrical transducers, including the practical experience from demonstrations of real experimental systems.
Students will acquire the basic concepts of the application of piezoelectric, ferroelectric and piezoresistive materials in electrical transducers, including the practical experience from demonstrations of real experimental systems.
|
|
Prerequisites
|
Exam from the subject Selected Parts of Physics.
|
|
Assessment methods and criteria
|
unspecified
Requirements for getting a credit are activity at the practicals /seminars. Examination is of the writing and oral forms.
|
|
Recommended literature
|
-
ERHART,J., PŮLPÁN,P., PUSTKA,M. Piezoelectric ceramic resonators. Springer, 2017. ISBN 978-3-319-424.
-
SETTER,N. Piezoelectric Materials in Devices. Ceramics Laboratory. EPFL Lausanne, 2002. ISBN 2-9700346-0-3.
-
UCHINO,K. Ferroelectric Devices. Marcel Dekker, Inc., New York, Basel, 2000. ISBN 0-8247-8133-3.
-
ZELENKA,J. Piezoelectric Resonators and Their Applications. Academia Praha, Elsevier Amsterdam, 1986.
|