Efficiency of Lamb wave excitation by wedge-shaped ultrasonic transducer

Nikolaevtsev, V. A.; Suchkov, S. G.; Selifonov, A. V.; Suchkov, Dmitry D.; Yankin, Sergey; Suchkova, Svetlana M.

doi:10.1109/apeie.2016.7802286

Cited by 2 publications

(2 citation statements)

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“…They combined other physical properties of PMMA, and finally proposed that PMMA is the most suitable material in the measurement experiment of liquid acoustic properties. Nikolaevtsev et al [23] investigated Lamb wave excitation by a wedge-shaped ultrasonic phase array transducer using the finite element (FEM) method. They investigated the influence of three different liquid layers and the dependence on the aperture of the transducer.…”

Section: Introductionmentioning

confidence: 99%

Impact of Wedge Parameters on Ultrasonic Lamb Wave Liquid-Level Sensor

Xue

Gao

Liu

et al. 2022

Sensors

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The ultrasonic Lamb wave detection principle can realize the noncontact measurement of liquid level in closed containers. When designing an ultrasonic Lamb wave sensor, it is vital to thoroughly study and select the optimal wedge size at the front of the sensor. In this paper, firstly, we select the best working mode of Lamb waves according to their propagation dispersion curve in aluminum alloy, and we obtain the best angle of wedge through experiments. Secondly, we study the impact of the size of the wedge block on the results, and we obtain the selection method of wedge block parameters. The evaluations show that, when the frequency–thickness product is 3 MHz·mm, the Lamb waves work in the A1 mode, and the experimental effect is the best. At this time, the incident angle of the ultrasonic wave is 27.39°. The wedge thickness should be designed to avoid the near-field area of the ultrasonic field, and we should choose the length as odd multiples of 1/4 wavelength. The rules obtained from the experiment can effectively select the best working mode for ultrasonic Lamb waves, while also providing a basis for the design of the wedge block size in a Lamb wave sensor.

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Section: Introductionmentioning

confidence: 99%

Impact of Wedge Parameters on Ultrasonic Lamb Wave Liquid-Level Sensor

Xue

Gao

Liu

et al. 2022

Sensors

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show abstract

“…The experimental measurement system was used as validation of the COMSOL model. The literature covering the use of COMSOL for modelling Lamb wave excitation using wedge transducers is limited; however, it has been shown that Lamb waves can be successfully generated using this method [36].…”

Section: Comsol Simulation Methodsmentioning

confidence: 99%

Modelling and Validation of a Guided Acoustic Wave Temperature Monitoring System

Yule

Zaghari

Harris

et al. 2021

Sensors

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The computer modelling of condition monitoring sensors can aide in their development, improve their performance, and allow for the analysis of sensor impact on component operation. This article details the development of a COMSOL model for a guided wave-based temperature monitoring system, with a view to using the technology in the future for the temperature monitoring of nozzle guide vanes, found in the hot section of aeroengines. The model is based on an experimental test system that acts as a method of validation for the model. Piezoelectric wedge transducers were used to excite the S0 Lamb wave mode in an aluminium plate, which was temperature controlled using a hot plate. Time of flight measurements were carried out in MATLAB and used to calculate group velocity. The results were compared to theoretical wave velocities extracted from dispersion curves. The assembly and validation of such a model can aide in the future development of guided wave based sensor systems, and the methods provided can act as a guide for building similar COMSOL models. The results show that the model is in good agreement with the experimental equivalent, which is also in line with theoretical predictions.

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Efficiency of Lamb wave excitation by wedge-shaped ultrasonic transducer

Cited by 2 publications

References 1 publication

Impact of Wedge Parameters on Ultrasonic Lamb Wave Liquid-Level Sensor

Impact of Wedge Parameters on Ultrasonic Lamb Wave Liquid-Level Sensor

Modelling and Validation of a Guided Acoustic Wave Temperature Monitoring System

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