scholarly journals 3-D Modelings of an Ultrasonic Phased Array Transducer and Its Radiation Properties in Solid

10.5772/29954 ◽  
2012 ◽  
Author(s):  
Kazuyuki Nakahata ◽  
Naoyuki Kono
Keyword(s):  
Phased Array ◽  
Array Transducer ◽  
Radiation Properties ◽  
Ultrasonic Phased Array

scholarly journals Laser-scanning photoacoustic microscopy with ultrasonic phased array transducer

2012 ◽  
Vol 3 (11) ◽  
pp. 2694 ◽  
Author(s):  
Fan Zheng ◽  
Xiangyang Zhang ◽  
Chi Tat Chiu ◽  
Bill L. Zhou ◽  
K. Kirk Shung ◽  
...  
Keyword(s):  
Laser Scanning ◽  
Phased Array ◽  
Photoacoustic Microscopy ◽  
Array Transducer ◽  
Ultrasonic Phased Array

Optimization of Element Parameters for a New OPFC Ultrasonic Phased Array Transducer

2014 ◽  
Vol 609-610 ◽  
pp. 1293-1298
Author(s):  
Zi Ping Wang ◽  
Ying Luo
Keyword(s):  
Damage Detection ◽  
Structural Damage ◽  
Phased Array ◽  
Low Voltage ◽  
Fiber Composite ◽  
Array Element ◽  
Structural Damage Detection ◽  
Array Transducer ◽  
Verification Methods ◽  
Ultrasonic Phased Array

An orthotropic piezoelectric fiber composite (OPFC) element and related OPFC ultrasonic phased array transducer which applied in damage detection of metal structures are investigated by theoretical analysis, numerical simulation and experimental verification methods. Based on electromechanical coupling, the influence of the material characteristics and geometry parameters on actuation performance is studied for the thickness expansion type OPFC elements. In view of lack in the mechanic-electronic parameter design of the existing single PZT element for modern ultrasonic phased array transducer, the related OPFC ultrasonic phased array transducer which used in metal structural damage detection is designed, which have the merits such as low voltage and limit the effects on grating lobe. The focusing acoustic field distribution is analyzed by finite element method together with directivity analysis in metals. The optimal array parameters such as phased array element interval, array element width and number of element are obtained by studying the total displacement changes as various parameters changes at focus point. The preparation of OPFC actuator used in metal structural damage detection is studied. The performance of interdigital OPFC element is also obtained by testing and comparing with the traditional PZT element. The experimental results displayed good agreement with the theoretical predictions.

Исследование применимости при контроле дефектов высокочастотных мод направленных волн с помощью фазированных решеток

2021 ◽  
pp. 27-34
Author(s):  
М.Дж. Ранджбар ◽  
Сина Содагар
Keyword(s):  
High Frequency ◽  
Phased Array ◽  
Surface Defects ◽  
Steel Plate ◽  
Small Diameter ◽  
Guided Wave ◽  
Scanning Method ◽  
Ultrasonic Guided Wave ◽  
Array Transducer ◽  
Ultrasonic Phased Array

An ultrasonic phased array scanning method was used for lamb wave evaluation of surface and in-depth defects in a steel plate. The ultrasonic guided wave modes resulting from a phased array transducer were modeled using finite element method. The experimental results showed that the high-frequency A0 mode gives acceptable sensitivity and resolution for small diameter through-thickness and surface defects. The sectorial scanning showed better axial resolution rather than spatial resolution.

Lead-free Ultrasonic Phased Array Transducer for Human Heart Imaging

2021 ◽  
pp. 1-1
Author(s):  
Xiaowen Ma ◽  
Yingchun Liu ◽  
Jiaji Ruan ◽  
Chenyang Tao ◽  
Jianren Yuan ◽  
...  
Keyword(s):  
Human Heart ◽  
Phased Array ◽  
Lead Free ◽  
Heart Imaging ◽  
Array Transducer ◽  
Ultrasonic Phased Array

Modeling Study of a Linear Ultrasonic Phased Array Transducer

2013 ◽  
Vol 441 ◽  
pp. 470-475
Author(s):  
De Xin Zhou ◽  
Xue Qian Tang ◽  
Xiang Lin Zhan
Keyword(s):  
Wave Propagation ◽  
Ultrasonic Wave ◽  
Acoustic Field ◽  
Phased Array ◽  
The Finite Element Method ◽  
Fem Modeling ◽  
Ultrasonic Wave Propagation ◽  
Beam Focusing ◽  
Array Transducer ◽  
Ultrasonic Phased Array

A numerical simulation model based on the finite element method (FEM) and wave analysis is proposed to study the acoustic field of a linear instructions and ultrasonic phased array (LUPA) transducer. The ultrasonic wave propagation in the isotropic solid is studied. The delay law controlling for electronic scanning of a LUPA transducer is analyzed. The ultrasonic wave propagation in the inspection material can be visualized in the form of displacement cloud images by FEM modeling. Experiments show that the model can efficiently and accurately predict the radiation field of beam focusing, steering and electronic scanning of a linear phased array transducer. By employing the proposed method, parameters can be conveniently changed to study the acoustic field of the ultrasonic beam in the medium. It is very helpful for designing and applying the linear phased array transducer and flaw inspection in NDT field.

scholarly journals Application of Dual Focused Ultrasonic Phased Array Transducer in Two Orthogonal Cross-Sections for Inspection of Multi-Layered Composite Components of the Aircraft Fuselage

Materials ◽  
2020 ◽  
Vol 13 (7) ◽  
pp. 1689 ◽  
Author(s):  
Renaldas Raišutis ◽  
Olgirdas Tumšys
Keyword(s):  
Spatial Resolution ◽  
Cross Sections ◽  
Phased Array ◽  
Complex Geometry ◽  
Ultrasonic Waves ◽  
Internal Defect ◽  
Flat Bottom ◽  
Aircraft Fuselage ◽  
Array Transducer ◽  
Ultrasonic Phased Array

Our previous studies have shown that the application of the proposed technique of a dual focused ultrasonic beam in two orthogonal cross-sections in passive (elevation) and active (azimuth) apertures of linear ultrasonic phased array transducer (ULPAT) enhances the 3D spatial resolution in the case of the inspection of conventional defects (flat bottom holes) or measurement of thickness of multi-layered metal composites. The objective of this work is to apply the proposed technique to enhance the spatial resolution of the ULPAT in the cases of detection and sizing demonstration of internal defects possessing spatially complex geometry, and during the inspection of defective multi-layered thin composite components (e.g., GLARE) of the aircraft fuselage. The specially prepared aluminium specimen possessing an internal defect of complicated geometry (crescent-shaped) was investigated. The simulation results and experiments demonstrate the resolution enhancement, higher amplitude of the reflections (e.g., 2.5 times or +8 dB) and spatial improvement in the defect detection even in the case of the non-perpendicular incidence of ultrasonic waves to the complex geometry surface of the internal defect. During the experiments, the multi-layered GFRP-metal based composite sample GLARE 3-3/2 was investigated in the case of the single-side access to the surface of the sample. The internal artificial delamination type defect of 25 mm was detected with a higher accuracy. Compared to the limitations of conventional ULPAT, the relative error (32%) (at the −6 dB level) of lateral defect dimensions estimation was completely reduced.

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