Contactless geometric and thickness imperfection measurement system for thin-walled structures

Lyssakow, Pawel; Friedrich, Linus; Krause, Max; Dafnis, Athanasios; Schröder, Kai‐Uwe

doi:10.1016/j.measurement.2019.107038

Cited by 11 publications

(4 citation statements)

References 26 publications

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“…types. Previous studies have mainly focused on the thickness measurements of low attenuating materials using primary longitudinal waves (PLWs) [1][2][3][4][5][6][7][8]. However, thickness measurements of highly attenuating materials with large sizes mainly employ ultrasound in the frequency range of a few or tens of kilohertz, which is unsuitable for small-size, highly attenuating materials because the wavelength of the low-frequency PLW is too large compared with the measured material size.…”

Section: Introductionmentioning

confidence: 99%

High-frequency ultrasound-based thickness measurement of highly attenuating materials

Wang

Lai

et al. 2022

Meas. Sci. Technol.

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This paper investigates an effective method for measuring the thickness of highly attenuating materials using the acoustic radiation-induced quasi-static component (QSC) of a primary longitudinal wave (PLW) at high frequency. The generated QSC features lower attenuation than the high-frequency PLW, so the generated QSC pulse with zero carrier frequency can propagate a longer distance at the same group velocity, even in highly attenuating materials. In addition, the method based on the QSC of a high-frequency PLW has better directivity than the low-frequency PLW-based method, making it more suitable for highly attenuated material local thickness measurement. The thickness of highly attenuating materials can be accurately measured by measuring the pulse-echo time-of-flight of the generated QSC pulse using an ultrasound pulse-echo technique. The experimental examinations conducted for highly attenuating silicone rubber blocks with different thicknesses demonstrate that their thicknesses can be accurately measured with the QSC-based method. This paper provides an effective method for thickness measurements of highly attenuating materials.

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Section: Introductionmentioning

confidence: 99%

High-frequency ultrasound-based thickness measurement of highly attenuating materials

Wang

Lai

et al. 2022

Meas. Sci. Technol.

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“…Specific focus will be given to the vibration of conical nanoshell with functionally graded materials. This structure has recently garnered the attention of researchers in the area of nanotechnology, drug delivery, cancer treatment, water purification, desalination and imperfection measurement systems [6][7][8][9]. Furthermore, the implementation of conical nanoshells has opened a new exploration avenue in the areas of plasmonic Fano-like resonances [10] and optics [11,12].…”

Section: Introductionmentioning

confidence: 99%

Free Vibrations of Flexoelectric FGM Conical Nanoshells with Piezoelectric Layers: Modeling and Analysis

et al. 2022

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Flexoelectric and piezoelectric effects have attracted the attention of researchers, owing to their applications in sensing systems and actuators. In this paper, the vibration of functionally graded material (FGM) conical nanoshell is studied, taking into account both piezoelectricity and flexoelectricity. The nanoshell has a sandwich-type structure with a FGM core and two layers of piezoelectric materials on its top and bottom. With the combination of the first order shear deformation and Eringen’s nonlocal theories, the vibration equation of the nanoshell is developed. In order to study the governing equations and the frequency of vibrations of nanoshell, the generalized differential quadrature method is implemented. Based on the developed numerical solution procedure, the effect of different parameters, such as flexoelectricity, piezoelectricity, nonlocal term and Pasternak foundation, are shown on the vibrations of conical nanoshell. The presented analysis provides a better insight into the behavior of conical nanoshells, which are highly applicable in bio-sensing and optical devices.

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“…Guo et al [ 9 ] developed a special geometric parameter measuring instrument based on the photoelectric micro-displacement sensor, which can directly measure the normal geometric thickness of thin-walled parts with deep holes. Lyssakow et al [ 10 ] used two laser sensors to successfully obtain the geometric defects and thickness defects of the cylindrical structure. Jin et al [ 11 ] proposed a tubing wall-thickness measurement method based on a measurement sensor and designed an online tubing wall-thickness measurement system with a wall-thickness measurement accuracy of ±0.05 mm.…”

Section: Introductionmentioning

confidence: 99%

A New Method for Precision Measurement of Wall-Thickness of Thin-Walled Spherical Shell Parts

Guo

Pan

et al. 2021

Micromachines

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Thin-walled parts are widely used in shock wave and detonation physics experiments, which require high surface accuracy and equal thickness. In order to obtain the wall thickness of thin-walled spherical shell parts accurately, a new measurement method is proposed. The trajectories, including meridian and concentric trajectories, are employed to measure the thickness of thin-walled spherical shell parts. The measurement data of the inner and outer surfaces are unified in the same coordinate system, and the thickness is obtained based on a reconstruction model. The meridian and concentric circles’ trajectories are used for measuring a spherical shell with an outer diameter of Φ210.6 mm and an inner diameter of Φ206.4 mm. Without the data in the top area, the surface errors of the outer and inner surfaces are about 5 μm and 6 μm, respectively, and the wall-thickness error is about 8 μm with the meridian trajectory.

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Contactless geometric and thickness imperfection measurement system for thin-walled structures

Cited by 11 publications

References 26 publications

High-frequency ultrasound-based thickness measurement of highly attenuating materials

High-frequency ultrasound-based thickness measurement of highly attenuating materials

Free Vibrations of Flexoelectric FGM Conical Nanoshells with Piezoelectric Layers: Modeling and Analysis

A New Method for Precision Measurement of Wall-Thickness of Thin-Walled Spherical Shell Parts

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