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Author

Jian Chen

Bio: Jian Chen is an academic researcher. The author has contributed to research in topics: Attenuation & Transducer. The author has an hindex of 1, co-authored 1 publications receiving 2 citations.

Papers
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Proceedings ArticleDOI
01 Oct 2012
TL;DR: In this article, the authors presented an ultrasonic technique for simultaneous determination of the complete set of acoustical and geometrical properties of a layer embedded between two known materials using point-focus transducers, which provides a high lateral resolution.
Abstract: This paper presents an ultrasonic technique for simultaneous determination of the complete set of acoustical and geometrical properties of a layer embedded between two known materials using point-focus transducer, which provides a high lateral resolution. The theoretical model of the two-dimensional spectrum Rt(θ,ω) of the layer is calculated as a function of six parameters: longitudinal and transverse velocities ci, ct, attenuation αi, αt, density ρ and thickness h, which fully determined the layer properties. The experimental spectrum Re(θ,ω) can be measured by V(z,t) technique using point-focus transducer which is verified in our previous work. By minimizing the differences between the theoretical and experimental spectra at normal and oblique incidence, the six parameters of the layer can be derived. The full set of the properties of a 250μm thick stainless steel layer immersed in water are determined using this technique as an example. This measurement technique enables precise measuring of the local full set properties of layers.

2 citations


Cited by
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Patent
19 Feb 2014
TL;DR: In this article, a water immersion ultrasonic phased-array detection device consisting of a rotary table, a control cabinet, a three-dimensional moving device, an ultrasonic probe and a control computer is presented.
Abstract: The invention belongs to the field of nondestructive detection, and relates to a water immersion ultrasonic phased-array detection device and a detection method of a disc part of an aero-engine. The water immersion ultrasonic phased-array detection device comprises a flaw detection water tank (1), a rotary table (2), a control cabinet (3), a three-dimensional moving device (4), an ultrasonic flaw detector, a control computer (6), a probe clamp (7) and an ultrasonic probe. The device is characterized in that the ultrasonic flaw detector is an ultrasonic phased-array flaw detector (5), and the ultrasonic probe is an annular-array ultrasonic phased-array probe (8). The detection method comprises detection steps as follows: system connection is conducted; and ultrasonic echo signals are acquired and recorded. According to the device and the method, the probe is prevented from being changed repeatedly, and the detection efficiency is improved.

17 citations

Patent
梁菁, 王铮, 史亦韦, 沙正骁, 王东升, 何方成 
13 Nov 2013
TL;DR: In this article, a water immersion ultrasonic phased-array detection device consisting of a rotary table, a control cabinet, a three-dimensional moving device, an ultrasonic probe and a control computer is presented.
Abstract: The invention belongs to the field of nondestructive detection, and relates to a water immersion ultrasonic phased-array detection device and a detection method of a disc part of an aero-engine. The water immersion ultrasonic phased-array detection device comprises a flaw detection water tank (1), a rotary table (2), a control cabinet (3), a three-dimensional moving device (4), an ultrasonic flaw detector, a control computer (6), a probe clamp (7) and an ultrasonic probe. The device is characterized in that the ultrasonic flaw detector is an ultrasonic phased-array flaw detector (5), and the ultrasonic probe is an annular-array ultrasonic phased-array probe (8). The detection method comprises detection steps as follows: system connection is conducted; and ultrasonic echo signals are acquired and recorded. According to the device and the method, the probe is prevented from being changed repeatedly, and the detection efficiency is improved.