Results 101 to 110 of about 134,310 (228)

The Hilbert Transform Application In Eddy Current Testing Signal Analysis [PDF]

open access: yes, 2011
The Hilbert transform of eddy current signal is dis cussed. Eddy current signals with simultaneous phase and amplitude modulations is investigated. The program simulate such a method of signal analysis was made in Matlab.
Куц, Юрий Васильевич   +1 more
core  

Orthogonal differential eddy current testing for internal detection of oil and gas pipeline based on incremental permeability extraction

open access: yesYou-qi chuyun
Objective Serving as the primary mode of transporting oil and natural gas, pipelines are prone to corrosion, cracks, and other defects under intricate operational conditions.
Yanshuang GONG   +7 more
doaj   +1 more source

Research on Fast Defect Inversion Method of Eddy Current Testing [PDF]

open access: yes, 2016
缺陷反演是在成功探伤基础上,对涡流信号进行分析,进一步推断导体中缺陷类型、具体形状,或媒质参数。缺陷反演是电磁检测中较正问题更为复杂的反问题,是涡流检测非常重要的一个方面。反演理论和技术在无损检测、医疗诊断、地球物理勘探、军事上隐身和反隐身等领域都有着重要的应用。涡流检测反问题的求解至今仍然缺少成熟的理论体系和快速可靠的算法,因此对缺陷反演技术的研究具有极其重要的意义。 对涡流检测关于缺陷反演的相关仿真可以指导缺陷反演技术的研究。相对于实验研究,仿真研究成本更低,也更加灵活 ...
刘超
core  

Pulsed Excitation in Eddy Current Non-Destructive Testing of Conductive Materials

open access: yesAdvances in Electrical and Electronic Engineering, 2008
The paper deals with eddy current non-destructive testing of conductive materials. Basic principle of the method is explained. Two types of eddy current excitation, the harmonic one and the pulsed one, are discussed.
Milan Smetana   +2 more
doaj  

Characterization of multilayered structures by swept-frequency eddy current testing

open access: yesAIP Advances, 2019
The signals of the electromagnetic non-destructive testing of a multilayered structure are functions of the dimension and the electromagnetic properties of each layer in this structure.
Weiying Cheng, Hidetoshi Hashizume
doaj   +1 more source

3D direct and inverse solvers for eddy current testing of deposits in steam generator

open access: yes, 2014
We consider the inverse problem of estimating the shape profile of an unknown deposit from a set of eddy current impedance measurements. The measurements are acquired with an axial probe, which is modeled by a set of coils that generate a magnetic field ...
Haddar, Houssem, Riahi, Mohamed Kamel
core   +1 more source

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