Surface estimation methods with phased-arrays for adaptive ultrasonic imaging in complex components

Robert, Sébastien; Calmon, Pierre; Calvo, M.; Jeune, Léonard Le; Яковлева, Екатерина

doi:10.1063/1.4914787

Cited by 8 publications

(4 citation statements)

References 2 publications

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“…The surface profile evaluation using several ultrasonic techniques was performed by S. Robert with co-authors [ 18 ]. These authors evaluated the surface profile using pulse- echo, pitch-catch, TFM and surface adaptive ultrasounds (SAUL) inspection modes.…”

Section: Introductionmentioning

confidence: 99%

“…When the delay law is known, it is possible to determine the amplitude of echo signal and calculate the amplitude of each pixel of the tomogram according to Kirchhoff migration [12]. This approach is used both for objects with a flat surface and a curved one [13][14][15][16][17][18][19]. The range of curve shaped objects is rather wide, such as crankshafts and camshafts of internal combustion engines, blades of gas turbine engines, blades of water and steam turbines, bearings, wheels and axles of railway cars, etc.…”

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confidence: 99%

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The Effect of the Position Determination Error for Flexible Linear Array Elements on the Tomogram Focusing

Sednev

Soldatov

Kostina

et al. 2023

Sensors

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In the article, the study of the quality of tomogram focusing during the inspection of objects with curved surfaces by flexible acoustic array was described. The main goal of the study was theoretically and experimentally define the acceptable deviation limits of the elements’ coordinates values. The tomogram reconstruction was performed by the total focusing method. The Strehl ratio was chosen as a criterion for assessing the quality of tomogram focusing. The ultrasonic inspection procedure were simulated and validated experimentally by means of convex and concave curved arrays. In the study, it was proven that the elements coordinates of the flexible acoustic array were determined with an error of no more than 0.18λ and the tomogram image was obtained in sharp focus.

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Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

The Effect of the Position Determination Error for Flexible Linear Array Elements on the Tomogram Focusing

Sednev

Soldatov

Kostina

et al. 2023

Sensors

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“…It can be performed with a single transducer, but its drawback is that it has only one focal area, and it is not a flexible solution. With a phased array, there is no such drawback [3][4][5]. The emitted sound wave can be electronically steered and, when emission delays are electronically controlled, it is possible to adapt an incident wavefront to the complex form of the object's surface or change the main lobe direction [3,6,7].…”

Section: Introductionmentioning

confidence: 99%

“…With a phased array, there is no such drawback [3][4][5]. The emitted sound wave can be electronically steered and, when emission delays are electronically controlled, it is possible to adapt an incident wavefront to the complex form of the object's surface or change the main lobe direction [3,6,7]. For a relatively complex surface, there are multiple methods for adapting the transducer itself for maximum energy transfer, starting from a specifically-constructed wedge, using a water-filled shoe or using flexible arrays [8].…”

Section: Introductionmentioning

confidence: 99%

Comparative analysis of plane-wave imaging and the total focusing method in the reconstruction of complex geometrical surfaces

Fyleris¹,

Jasiūnienė²

2019

Surf. Topogr.: Metrol. Prop.

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The non-destructive inspection by ultrasonic immersion imaging of various objects with complex geometric surfaces can be problematic because the effects of refraction have a high impact on the path of propagating acoustic waves. In order to reconstruct an image of sufficient quality, development of a precise surface model of the structure is necessary. In this research, two different methods (the total focusing method (TFM) and plane-wave imaging (PWI) using Delay-And-Sum(DAS) and Multiply-Delay-And-Sum (MDAS) modes) for surface-geometry reconstruction are investigated. The ability of these methods to reconstruct the boundaries of complex surfaces is also presented using probes with less than 10 Mhz center frequency where object surface angles bent radius is comparable with emission wavelength. It is demonstrated that PWI is a more effective method of making surface reconstructions than the TFM due to its simplicity and utilization of lesser computational resources to reconstruct the surfaces of larger objects.

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Adaptive Ultrasonic Imaging Total Focusing Method Based on Covariance Correlation Weighting Factor

et al. 2023

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Surface estimation methods with phased-arrays for adaptive ultrasonic imaging in complex components

Cited by 8 publications

References 2 publications

The Effect of the Position Determination Error for Flexible Linear Array Elements on the Tomogram Focusing

The Effect of the Position Determination Error for Flexible Linear Array Elements on the Tomogram Focusing

Comparative analysis of plane-wave imaging and the total focusing method in the reconstruction of complex geometrical surfaces

Adaptive Ultrasonic Imaging Total Focusing Method Based on Covariance Correlation Weighting Factor

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