نتایج جستجو برای: crack detection

تعداد نتایج: 589151  

2015
Zhiping Liu Xingle Liu Lei Jiang Ge Lu Huilong Liu

During the weld defect detection, the heat transfer characteristics are closely related to the material properties of welded structure. Based on the electromagnetic induction infrared thermography technology, the heat transfer Characteristics of the welded material are studied with the changing temperature. By using the finite element analysis software COMSOL, the eddy current density and tempe...

Journal: :SIAM Journal of Applied Mathematics 2011
Habib Ammari Josselin Garnier Hyeonbae Kang Won-Kwang Park Knut Sølna

Abstract. We consider the problem of locating perfectly conducting cracks and estimating their geometric features from multi-static response matrix measurements at a single or multiple frequencies. A main objective is to design specific crack detection rules and to analyze their receiver operating characteristics and the associated signal-to-noise ratios. In this paper we introduce an analytic ...

Journal: :Pattern Recognition 2003
Changming Sun Stefano Pallottino

Shortest path algorithms have been used in a number of applications such as crack detection, road or linear feature extraction in images. There are applications where the starting and ending positions of the shortest path need to be constrained. In this paper, we present several new algorithms for the extraction of a circular shortest path in an image such that the starting and ending positions...

2015
Q. An D. Hortig M. Merklein

Active dynamic thermography was proved to be a new alternative for crack detection. To achieve zero failure sheet metal production in the press shop, this method was investigated for different steel components, which were directly collected from series production. And the cracks in the presented specimens differ in length and in depth, and a series study on these surface cracks is executed. The...

2012
Tishun Peng Jingjing He Yongming Liu Abhinav Saxena Jose Celaya

An integrated fatigue damage diagnosis and prognosis framework is proposed in this paper. The proposed methodology integrates a Lamb wave-based damage detection technique and a Bayesian updating method for remaining useful life (RUL) prediction. First, a piezoelectric sensor network is used to detect the fatigue crack size near the rivet holes in fuselage lap joints. Advanced signal processing ...

2013
C. Serra A. Tadeu J. Prata N. Simões

This paper presents a 3D boundary element model (BEM), formulated in the frequency domain, to simulate heat diffusion by conduction in the vicinity of 3D cracks. The model intends to contribute to the interpretation of infrared thermography (IRT) data results and to explore the features of this nondestructive testing technique (NDT) when it is used to detect and characterize defects. The defect...

Journal: :IEEE Journal of Selected Topics in Signal Processing 2012

Journal: :The Journal of the Acoustical Society of America 1980

Journal: :Journal of physics 2023

Abstract The pavement crack causes the highway service life to shorten, safety hidden danger increase. low efficiency and high cost of manual inspection makes it difficult detect cracks. This paper proposes a fast efficient deep learning detection system. CRACK2000, an image segmentation dataset with complex interference background multiple types, is constructed based on perspective transformat...

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