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Concurrent engineering design of a miniature piezo-transducer-vibrator
Title
Concurrent engineering design of a miniature piezo-transducer-vibrator.
Creator
Hedayatnia, Mostafa., Florida Atlantic University, Mazouz, Abdel Kader, College of Engineering and Computer Science, Department of Ocean and Mechanical Engineering
Abstract/Description
A state-of-the-art Piezo-Transducer-Vibrator suitable for a wristwatch has been developed based on a "Customer Comprehension" program: To look at the product from the customer point of view and try to satisfy those needs simultaneously using computer simulation leading to a reliable design in a shorter cycle time. This device is a miniature integrated compact form of both audio and silent alerts which uses less than 8 mA current; desirable to be used in equipments with very small power...
Show moreA state-of-the-art Piezo-Transducer-Vibrator suitable for a wristwatch has been developed based on a "Customer Comprehension" program: To look at the product from the customer point of view and try to satisfy those needs simultaneously using computer simulation leading to a reliable design in a shorter cycle time. This device is a miniature integrated compact form of both audio and silent alerts which uses less than 8 mA current; desirable to be used in equipments with very small power sources. A new ergonomic study was conducted in comprehending the minimum acceptable shake and frequency on human wrist. The complete Piezo-bender structure, its driving format, and its vibration has been modeled accurately to obtain an optimum geometry design for the best possible shake, satisfying all constraints.
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Date Issued
1994
PURL
http://purl.flvc.org/fcla/dt/12358
Subject Headings
Piezoelectric transducers, Wrist watches, Vibrators
Format
Document (PDF)
Modeling piezoelectric material and ultrasound transducers
Title
Modeling piezoelectric material and ultrasound transducers.
Creator
Crimi, Sarah., Harriet L. Wilkes Honors College
Abstract/Description
We discuss piezoelectric and piezoceramic material as well as ultrasound transducers. We study the analytical methods for calculating the impedance of a simple bar of piezoceramic material and a simple ultrasound transducer, and discuss the methodology behind the numerical technique (Finite Element Method) to model a complex ultrasound transducer. With a simple ultrasound transducer model created in the software program PZex, we find out how the impedance is aected when the scale of the...
Show moreWe discuss piezoelectric and piezoceramic material as well as ultrasound transducers. We study the analytical methods for calculating the impedance of a simple bar of piezoceramic material and a simple ultrasound transducer, and discuss the methodology behind the numerical technique (Finite Element Method) to model a complex ultrasound transducer. With a simple ultrasound transducer model created in the software program PZex, we find out how the impedance is aected when the scale of the relative permittivity is varied. We then create a working model of a complex ultrasound transducer and learn how impedance is affected by varying the size of the electrode driven and adding a propagation layer. We saw that there was not a direct relationship between varying the relative permittivity and the change in impedance as we expected. We saw that varying the size of the electrode and adding a propagation layer created expected impedances.
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Date Issued
2010
PURL
http://purl.flvc.org/FAU/3334250
Subject Headings
Piezoelectric transducers, Finite element method, Ultrasonic waves, Microelectromechanical systems
Format
Document (PDF)
Impact analysis of a piezo-transducer-vibrator
Title
Impact analysis of a piezo-transducer-vibrator.
Creator
Karabiyik, Necati., Florida Atlantic University, Tsai, Chi-Tay, College of Engineering and Computer Science, Department of Ocean and Mechanical Engineering
Abstract/Description
Piezo-Transducer-Vibrators are miniature devices that emit both audio and silent signals and are currently targeted for use as an integral part of wristwatch technology. Utilizing nonlinear finite element analysis is essential for obtaining a greater understanding of the system response under varying conditions. Dyna3D nonlinear finite element code is applied in this analysis with the focus on the mechanical aspects of the vibrator. Four impact variables, the velocity, the plate gap, the...
Show morePiezo-Transducer-Vibrators are miniature devices that emit both audio and silent signals and are currently targeted for use as an integral part of wristwatch technology. Utilizing nonlinear finite element analysis is essential for obtaining a greater understanding of the system response under varying conditions. Dyna3D nonlinear finite element code is applied in this analysis with the focus on the mechanical aspects of the vibrator. Four impact variables, the velocity, the plate gap, the weight and the velocity angle are studied to determine the effects on the system response. Each impact variable is assigned three separate values, creating twelve programs for analysis. For each program, responses to impact conditions are studied demonstrating the deformed mode shapes, maximum principal stresses and maximum displacements using state database plots and time-history plots.
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Date Issued
1994
PURL
http://purl.flvc.org/fcla/dt/15008
Subject Headings
Piezoelectric transducers, Finite element method, Wrist watches, Vibrators
Format
Document (PDF)