Design and development of flexural disc projector for low frequency sonar applications

Kumar, Manoj; Abraham, Rijo Mathews; Ramesh, R.; Moosad, K. P. B.; Ebenezer, D. D.

doi:10.1109/sympol.2013.6701946

Cited by 3 publications

(2 citation statements)

References 3 publications

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“…Therefore, small signal measurements are not expected to cause a significant error. Hence measurement values of admittance with small signals are subsequently used to determine the equivalent circuit parameters [9][10][11], namely R1, L1, C0 and C1. These parameters are refined by least-squares fitting to Eq.…”

Section: Underwater Transducermentioning

confidence: 99%

Impedance Matching Network of Passive Coupler with Coaxial Cable for Airborne Sonar Applications

Manoj

Ramesh

Kundukulam

2023

AiMT

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A design methodology is proposed to implement an impedance-matching network in a high-power underwater acoustic transmitting system to minimize power loss through long cables. For this, a Lumped-parameter electrical equivalent circuit model has been developed to analyze the transmitting system along with various couplers and de-couplers introduced for simultaneous transmission of data and DC power along with high-power AC. The effects of these couplers on the end performance of the system have been studied and compensated for by suitably modifying the impedance matching lines (ML). The appropriate impedance matching lines significantly enhance the power by about 300 watts and improve the power factor to 100 %.

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Section: Underwater Transducermentioning

confidence: 99%

Impedance Matching Network of Passive Coupler with Coaxial Cable for Airborne Sonar Applications

Manoj

Ramesh

Kundukulam

2023

AiMT

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“…John L. Delany [21] proposed a bender structure with an air cavity to suppress back radiation and improve efficiency and pressure-resistant capacity. Ajesh Kumar et al [22] analyzed the influence of structural size on the acoustic performance of benders and calculated the theoretical source level under static pressure. Daisuke Watanabe et al [23] proposed a transducer supported by a radial movable bearing, which is conducive to the smooth change of the resonant frequency corresponding to different excitation frequencies.…”

Section: Introductionmentioning

confidence: 99%

Design of a Broadband Cavity Baffle Bender Transducer

Zhang

et al. 2022

JMSE

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As low-frequency and broadband acoustic emission capability is beneficial to the detection range and acoustic communication speed of small scale autonomous underwater vehicles (AUV), this type of transducer is required, especially in cases of complex acoustic environments. A broadband bender transducer with cavity baffle that suits small scale AUV is proposed. Rather than additional benders, a passive cavity baffle, which would be capable of providing mutual radiation and a fluid cavity mode, is introduced to a single bender. The bending resonant frequency is reduced by the mutual radiation between the bender and the cavity baffle, the cavity baffle extends the lower limit of the available frequency band of the transducer, the liquid resonant frequency behind the former expands the higher limit, then the cavity baffle bender transducer fills the role of radiating low-frequency and broadband emissions through multimode coupling. The finite element method is used to analyze the acoustic performance of the transducer under different baffle conditions. Then, a prototype of the broadband cavity baffle bender transducer is developed according to the optimized parameters of simulation. The acoustic parameters of the prototype were measured in an anechoic pool. The resonant frequency measured in water of the bender itself is 3 kHz, and the −3dB bandwidth is 560 Hz. The prototype test results show that the cavity baffle scheme can improve the −3dB bandwidth of the bender from 560 Hz to 1000 Hz, which fundamentally realizes the expectations of the prototype design.

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Lumped-Parameter Modeling and Performance Analysis of Fluid-Backed Piezoceramic Flexural Disc Acoustic Sensors

et al. 2021

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Design and development of flexural disc projector for low frequency sonar applications

Cited by 3 publications

References 3 publications

Impedance Matching Network of Passive Coupler with Coaxial Cable for Airborne Sonar Applications

Impedance Matching Network of Passive Coupler with Coaxial Cable for Airborne Sonar Applications

Design of a Broadband Cavity Baffle Bender Transducer

Lumped-Parameter Modeling and Performance Analysis of Fluid-Backed Piezoceramic Flexural Disc Acoustic Sensors

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