A 2-D KLM Model for Disk-Shape Piezoelectric Transducers

Galliere, Jean-Marc; Latorre, Laurent; Papet, Philippe

doi:10.1109/cenics.2009.12

Cited by 7 publications

(5 citation statements)

References 6 publications

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“…In order to obtain a setup being as small as possible, we nonetheless chose a disk featuring a relatively small diameter. In the literature [19–21] , 2D-models covering this coupling between the thickness and the planar modes are discussed, however, due to their complexity and the number of additional parameters, these models are hardly suited for a parameter fit based on an impedance measurement as used in our approach. For all simulations given below, the so fitted PZT parameters have been used.…”

Section: Simulation and Experimental Resultsmentioning

confidence: 99%

An acoustic transmission sensor for the longitudinal viscosity of fluids

Antlinger

Clara

Beigelbeck

et al. 2013

Sensors and Actuators A: Physical

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Section: Simulation and Experimental Resultsmentioning

confidence: 99%

An acoustic transmission sensor for the longitudinal viscosity of fluids

Antlinger

Clara

Beigelbeck

et al. 2013

Sensors and Actuators A: Physical

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“…[22,23]. Equation ( 13) and (14) show admittances substituting the efficiency, η i , into the revised fitness function as described in Equation ( 10) and (11).…”

Section: Separated Mechanical and Acoustic Radiation Resistancementioning

confidence: 99%

“…In 1961, Redwood presented the circuit model with electrical transmission lines to express the transient phenomenon of the transducer operation, such as signal delay times and reflections by impedance matching [10,12]. In 1970, the KLM model was proposed for transducers operated in a high-frequency band [10,11,13,14]. The model is 2-D, which is considered the front Electronics 2021, 10, 2416 2 of 12 and back acoustic parts of a ceramic, unlike the Mason model.…”

Section: Introductionmentioning

confidence: 99%

An Estimation Method of an Electrical Equivalent Circuit Considering Acoustic Radiation Efficiency for a Multiple Resonant Transducer

Lee

Baek

et al. 2021

Electronics

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The electrical equivalent model of an underwater acoustic transducer must be exactly defined in the operating frequency band to improve the driving efficiency between a sonar transmitter and a transducer. This paper used the PSO (particle swarm optimization) algorithm to estimate electrical equivalent circuit parameters of a transducer that has multiple resonant modes. The proposed method used a new fitness function to minimize the estimation error between the measured impedance of the transducer and the estimated impedance. The difference to the previous method is that the proposed method considered interference effects of the adjacent resonant modes. Additionally, this paper analyzed the effective power and separated the mechanical and acoustical resistance by considering the acoustic radiation efficiency of the transducer. As a result, the proposed method estimated all parameters at the resonance points which are influenced by the adjacent resonant modes.

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“…It can be shown for typical geometries of transducers that the first vibration mode is the radial mode. It is possible to find an analytic solution that combines these modes for simplified 3D geometries [39][40][41][42][43]. These analytic models are difficult to couple with analytic wave transmission models which makes them actually hardly usable.…”

Section: External and Embedded Transducersmentioning

confidence: 99%

Design optimization of embedded ultrasonic transducers for concrete structures assessment

Dumoulin

2017

Ultrasonics

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In the last decades, the field of structural health monitoring and damage detection has been intensively explored. Active vibration techniques allow to excite structures at high frequency vibrations which are sensitive to small damage. Piezoelectric PZT transducers are perfect candidates for such testing due to their small size, low cost and large bandwidth. Current ultrasonic systems are based on external piezoelectric transducers which need to be placed on two faces of the concrete specimen. The limited accessibility of in-service structures makes such an arrangement often impractical. An alternative is to embed permanently low-cost transducers inside the structure. Such types of transducers have been applied successfully for the in-situ estimation of the P-wave velocity in fresh concrete, and for crack monitoring. Up to now, the design of such transducers was essentially based on trial and error, or in a few cases, on the limitation of the acoustic impedance mismatch between the PZT and concrete. In the present study, we explore the working principles of embedded piezoelectric transducers which are found to be significantly different from external transducers. One of the major challenges concerning embedded transducers is to produce very low cost transducers. We show that a practical way to achieve this imperative is to consider the radial mode of actuation of bulk PZT elements. This is done by developing a simple finite element model of a piezoelectric transducer embedded in an infinite medium. The model is coupled with a multi-objective genetic algorithm which is used to design specific ultrasonic embedded transducers both for hard and fresh concrete monitoring. The results show the efficiency of the approach and a few designs are proposed which are optimal for hard concrete, fresh concrete, or both, in a given frequency band of interest.

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A 2-D KLM Model for Disk-Shape Piezoelectric Transducers

Cited by 7 publications

References 6 publications

An acoustic transmission sensor for the longitudinal viscosity of fluids

An acoustic transmission sensor for the longitudinal viscosity of fluids

An Estimation Method of an Electrical Equivalent Circuit Considering Acoustic Radiation Efficiency for a Multiple Resonant Transducer

Design optimization of embedded ultrasonic transducers for concrete structures assessment

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