Journal Article10.1016/J.JSV.2004.10.043
Structural damage detection using digital video imaging technique and wavelet transformation
Upendra P. Poudel,G. Fu,J. Ye +2 more
95
TL;DR: In this paper, the authors used a high-speed digital video camera to obtain displacement time series at sub-pixel resolution, and the mode shapes were obtained from the time series to find the mode shape difference functions between the damaged and the reference states.
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About: This article is published in Journal of Sound and Vibration. The article was published on 22 Sep 2005. The article focuses on the topics: Edge detection & Digital image.
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Citations
Photogrammetry and optical methods in structural dynamics – A review
TL;DR: In this paper, the most current trends in the photogrammetry technique (point tracking, digital image correlation, and target-less approaches) are reviewed and compared to other measurement techniques used in structural dynamics (e.g., laser Doppler vibrometry and interferometry).
483
Features of dynamic response sensitivity and its application in damage detection
Zhong-Rong Lu,Siu-Seong Law +1 more
TL;DR: The sensitivity of general dynamic response of a structure with respect to a perturbation in a parameter of a dynamic system is addressed in this paper, where the sensitivity of response of the structure when under sinusoidal, impulsive and random excitations is calculated, and their properties discussed.
192
A survey and evaluation of promising approaches for automatic image-based defect detection of bridge structures
TL;DR: A survey and evaluation of relevant studies that appear promising and practical for this purpose is presented in this paper, where several image processing techniques, including enhancement, noise removal, registratio, etc., are evaluated.
187
A Review of Machine Vision-Based Structural Health Monitoring: Methodologies and Applications
TL;DR: The purpose of this review article is devoted to presenting a summary of the basic theories and practical applications of the machine vision-based technology employed in structural monitoring as well as its systematic error sources and integration with other modern sensing techniques.
Computer vision-based displacement and vibration monitoring without using physical target on structures
Tung Khuc,F. Necati Catbas +1 more
TL;DR: In this paper, a non-target computer vision-based method for displacement and vibration measurement is proposed by exploring a new type of virtual markers instead of physical targets, where the key points of measurement positions obtained using a robust computer vision technique named scale invariant feature transform show a potential ability to take the place of classical targets.
154
References
A Computational Approach to Edge Detection
TL;DR: There is a natural uncertainty principle between detection and localization performance, which are the two main goals, and with this principle a single operator shape is derived which is optimal at any scale.
29.9K
A theory for multiresolution signal decomposition: the wavelet representation
TL;DR: In this paper, it is shown that the difference of information between the approximation of a signal at the resolutions 2/sup j+1/ and 2 /sup j/ (where j is an integer) can be extracted by decomposing this signal on a wavelet orthonormal basis of L/sup 2/(R/sup n/), the vector space of measurable, square-integrable n-dimensional functions.
Ten Lectures on Wavelets
TL;DR: In this article, the regularity of compactly supported wavelets and symmetry of wavelet bases are discussed. But the authors focus on the orthonormal bases of wavelets, rather than the continuous wavelet transform.
14.2K
Damage identification and health monitoring of structural and mechanical systems from changes in their vibration characteristics: A literature review
Scott W. Doebling,Charles R. Farrar,Michael B. Prime,D.W. Shevitz +3 more
- 01 May 1996
TL;DR: A review of the technical literature concerning the detection, location, and characterization of structural damage via techniques that examine changes in measured structural vibration response is presented in this article, where the authors categorize the methods according to required measured data and analysis technique.
Damage detection from changes in curvature mode shapes
TL;DR: In this article, a new parameter called curvature mode shape is investigated as a possible candidate for identifying and locating damage in a structure, and it is shown that the absolute changes in the curvature shape are localized in the region of damage and hence can be used to detect damage.
2.1K