Coupled electromechanical modeling of piezoelectric disc transducers for low-frequency ultrasonic collimated beam generation

2017 ◽  
Author(s):  
Vamshi Krishna Chillara ◽  
Cristian Pantea ◽  
Dipen N. Sinha
Keyword(s):  
Low Frequency ◽  
Beam Generation ◽  
Electromechanical Modeling ◽  
Piezoelectric Disc ◽  
Collimated Beam

scholarly journals Low-frequency ultrasonic collimated beam generation from piezoelectric discs

2017 ◽  
Author(s):  
Vamshi Krishna Chillara ◽  
Cristian Pantea ◽  
Dipen N. Sinha
Keyword(s):  
Low Frequency ◽  
Beam Generation ◽  
Collimated Beam

scholarly journals Low-frequency ultrasonic Bessel-like collimated beam generation from radial modes of piezoelectric transducers

2017 ◽  
Vol 110 (6) ◽  
pp. 064101 ◽  
Author(s):  
Vamshi Krishna Chillara ◽  
Cristian Pantea ◽  
Dipen N. Sinha
Keyword(s):  
Low Frequency ◽  
Piezoelectric Transducers ◽  
Beam Generation ◽  
Collimated Beam

scholarly journals Radial modes of laterally stiffened piezoelectric disc transducers for ultrasonic collimated beam generation

Wave Motion ◽  
2018 ◽  
Vol 76 ◽  
pp. 19-27 ◽  
Author(s):  
Vamshi Krishna Chillara ◽  
Cristian Pantea ◽  
Dipen N. Sinha
Keyword(s):  
Beam Generation ◽  
Piezoelectric Disc ◽  
Collimated Beam

Electromechanical Modeling of the Low Frequency MEMS Energy Harvester

2009 ◽  
Author(s):  
M. Amin Karami ◽  
Daniel J. Inman
Keyword(s):  
Power Output ◽  
Natural Frequencies ◽  
Vibrational Energy ◽  
Closed Form Solution ◽  
Low Frequency ◽  
Form Solution ◽  
Mode Shapes ◽  
Energy Harvesters ◽  
Electromechanical Modeling ◽  
Deflection Voltage

An analytical electromechanical model is proposed to predict the deflection, voltage and the power output a proposed low frequency micro harvesting structure. The high natural frequencies of the existing designs of MEMS vibrational energy harvesters are serious drawbacks. A zigzag design is proposed to overcome this limitation. The mode shapes of the free vibration problem are first calculated together with the natural frequencies of the structure. The piezoelectric direct and reverse effect equations together with the electrical equations are used to relate the voltage output of the structure to the base vibrations magnitude and frequency. The closed form solution of the continuous electromechanical vibrations precisely gives the power output as a function of base acceleration spectrum. The usefulness of the design is proved by the significant increase of the power output from the same base accelerations, providing a method of designing a MEMS harvester with low natural frequency.

A Study on the Fine Structure of the Lateral Line Organ of the Sea Eel

1973 ◽  
Vol 31 ◽  
pp. 648-649
Author(s):  
K. Hama
Keyword(s):  
Fine Structure ◽  
Electron Microscope ◽  
Lateral Line ◽  
Low Frequency ◽  
Sensory Cells ◽  
Apical Surface ◽  
Voltage Electron ◽  
Sensory Epithelia ◽  
Low Frequency Vibration ◽  
Transmission Electron

The lateral line organs of the sea eel consist of canal and pit organs which are different in function. The former is a low frequency vibration detector whereas the latter functions as an ion receptor as well as a mechano receptor.The fine structure of the sensory epithelia of both organs were studied by means of ordinary transmission electron microscope, high voltage electron microscope and of surface scanning electron microscope.The sensory cells of the canal organ are polarized in front-caudal direction and those of the pit organ are polarized in dorso-ventral direction. The sensory epithelia of both organs have thinner surface coats compared to the surrounding ordinary epithelial cells, which have very thick fuzzy coatings on the apical surface.

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