Ultra wideband multiple resonant transducer

Butler, John L.; Butler, Alexander L.

doi:10.1109/oceans.2003.178286

Cited by 7 publications

(7 citation statements)

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“…This suppression of even harmonics can be removed by insertion of a new resonant frequency. As a result coupling coefficient will be distributed over a band of frequencies and the power factor of the transducer will be improved leading to a wide band ultrasonic wave comprising of multiple frequencies [26,27]. Achieving the proper thickness to diameter ratio of ultrasonic sensor, fine tuned resonant frequency can be generated offering more precise control over ultrasonic frequency generation.…”

Section: The Feedback Modulementioning

confidence: 99%

An extended model for ultrasonic-based enhanced oil recovery with experimental validation

Mohsin¹,

Meribout²

2015

Ultrasonics Sonochemistry

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This paper suggests a new ultrasonic-based enhanced oil recovery (EOR) model for application in oil field reservoirs. The model is modular and consists of an acoustic module and a heat transfer module, where the heat distribution is updated when the temperature rise exceeds 1 °C. The model also considers the main EOR parameters which includes both the geophysical (i.e., porosity, permeability, temperature rise, and fluid viscosity) and acoustical (e.g., acoustic penetration and pressure distribution in various fluids and mediums) properties of the wells. Extended experiments were performed using powerful ultrasonic waves which were applied for different kind of oils & oil saturated core samples. The corresponding results showed a good matching with those obtained from simulations, validating the suggested model to some extent. Hence, a good recovery rate of around 88.2% of original oil in place (OOIP) was obtained after 30 min of continuous generation of ultrasonic waves. This leads to consider the ultrasonic-based EOR as another tangible solution for EOR. This claim is supported further by considering several injection wells where the simulation results indicate that with four (4) injection wells; the recovery rate may increase up-to 96.7% of OOIP. This leads to claim the high potential of ultrasonic-based EOR as compared to the conventional methods. Following this study, the paper also proposes a large scale ultrasonic-based EOR hardware system for installation in oil fields.

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Section: The Feedback Modulementioning

confidence: 99%

An extended model for ultrasonic-based enhanced oil recovery with experimental validation

Mohsin¹,

Meribout²

2015

Ultrasonics Sonochemistry

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“…However, their research was limited to the vibration of a piezoelectric stack operating in a pure thickness mode, which is different from the multimode Tonpilz transducer in this work operating in both longitudinal and flexural modes [ 4 ]. The technique to use a composite electrode configuration to generate even harmonics was introduced by Butler’s, but it was also good only for a transducer operating in a pure longitudinal mode [ 22 ].…”

Section: Introductionmentioning

confidence: 99%

Design of a Wideband Tonpilz Transducer Comprising Non-Uniform Piezoceramic Stacks with Equivalent Circuits

Pyo

Afzal

Lim³

et al. 2021

Sensors

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Tonpilz transducers are desirable for their superior performance in underwater target detection and communication applications. Several design schemes to widen their bandwidth have been reported, but these schemes often involve a complex structure or arrangement of additional components. In this study, a simple design is proposed to improve the bandwidth of a multimode Tonpilz transducer by using a non-uniform drive section that consists of piezoelectric stacks of various thicknesses. The efficacy of the design is illustrated with a multimode Tonpilz transducer having three lead zirconate titanate (PZT) stacks of different thicknesses. A new equivalent circuit was developed to analyze the frequency response of the transducer incorporating the non-uniform drive section and was used for rigorous analysis of the effects of varying the position and thickness of the non-uniform stacks on the transmitting characteristics of the transducer. The validity of the design was verified through the fabrication and characterization of a prototype multimode Tonpilz transducer. The developed structure can be readily extended to an arbitrary number of stacks in the Tonpilz transducer with any number of PZT disks in each stack.

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Section: Introductionmentioning

confidence: 99%

“…Existing acoustic transducers used in active sonar systems have been developed for broadband, high power, and high efficiency [1][2][3][4][5]. For driving transducers in broadband, multiple resonant modes should be adjacently located in the operating frequency [4,5]. For efficiently driving transducers at a high power level, it is necessary to design an impedance matching circuit between the sonar transmitter and the transducer [1,2].…”

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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Ultra wideband multiple resonant transducer

Cited by 7 publications

References 0 publications

An extended model for ultrasonic-based enhanced oil recovery with experimental validation

An extended model for ultrasonic-based enhanced oil recovery with experimental validation

Design of a Wideband Tonpilz Transducer Comprising Non-Uniform Piezoceramic Stacks with Equivalent Circuits

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

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