Search
Now showing items 1-10 of 760
Efficacy of linear and convex transducers for ultrasound-guided transvaginal follicle aspiration
(Elsevier B.V., 2003-03-01)
A new device was developed to hold linear transducers for transvaginal follicle aspiration. Efficacy of follicle aspiration was compared using a linear 6 MHz and a convex 5 MHz transducer. Fifty-five cows were submitted ...
Piezoelectric transducers assessed by the pencil lead break for impedance-based structural health monitoring
(Ieee-inst Electrical Electronics Engineers Inc, 2015-02-01)
The pencil lead break (PLB) is a well-known method for characterizing acoustic emission sensors. In this paper, we analyze the effectiveness of this method in characterizing piezoelectric transducers for structural health ...
Modeling of functionally graded piezoelectric ultrasonic transducers
(ELSEVIER SCIENCE BV, 2009)
The application of functionally graded material (FGM) concept to piezoelectric transducers allows the design of composite transducers without interfaces, due to the continuous change of property values. Thus, large ...
Open and Standardized Resources for Smart Transducer Networking
(Institute of Electrical and Electronics Engineers (IEEE), 2009-10-01)
IEEE 1451 standard is intended to address the smart transducer interfacing problem in network environments. Usually, proprietary hardware and software are a very efficient solution for implementing the aforementioned ...
Analysis of 1-3 piezocomposite and homogeneous piezoelectric rings for power ultrasonic transducers
(Associação Brasileira de Engenharia e Ciências Mecânicas - ABCM, 2009)
Some power ultrasonic transducers, such as Tonpilz transducers, require high-power transmitting capability as well as broadband performance. Optimized vibrational modes can achieve these requirements. This work compares ...
Sensitivity Enhancement of Piezoelectric Transducers for Impedance-Based Damage Detection via a Negative Capacitance Interface
(2020-12-01)
Piezoelectric transducers are used in many applications due to electromechanical coupling, which allows mechanical and electrical quantities to be related. This principle is used in the development of structural damage ...
Performance of three transducer mounting methods in impedance-based structural health monitoring applications
(2017-10-01)
Piezoelectric transducers are widely used in many nondestructive methods for damage detection in structural health monitoring applications. Among the various methods for detecting damage, the electromechanical impedance ...
Impact Localization in Composites Using Time Reversal, Embedded PZT Transducers, and Topological Algorithms
(2020-03-17)
Time reversal is a powerful imaging processing technique that focuses waves at their original source using a single receiver transducer when diffusive wave field conditions are met. This has been successfully proved on ...
Evaluation of the piezoelectric behaviour produced by a thick-film transducer using digital speckle pattern interferometry
(Elsevier, 2011-02)
This paper presents an interferometric measurement of the out-of-plane deflections produced by a piezoelectric transducer, manufactured by thick-film deposition of a ceramic paste over an alumina substrate, when is subjected ...
One-dimensional analysis of piezoelectric transducers based on Thevenin theorem
(Soc Brasileira FisicaSao PauloBrasil, 2009)