A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Laser shearography for detection of fine cracks in concrete and masonry
Laser shearography is a refinement of electronic speckle interferometry (ESPI) that records a sheared image of the speckle interferogram. This produces a self-referenced image and consequently avoids the need for very precise positioning as required with conventional ESPI. Thus the laser shearography system can be used in the field under ambient conditions. It has been applied to detect fine cracks at early ages in concrete, with a resolution better than 10 microns. Moreover, the output of the system is a digital image which can be processed with image analysis software to yield statistics on the crack distribution such as length, width and preferred orientation, that can be used to diagnose the cause of the cracks. Since it is a nondestructive method it can be used to make repeated measurements on the same location over time, and thus monitor the propagation of cracks. It has also been used to detect cracks and other flaws in historic brick masonry buildings including the Blair House in Washington, DC.
Laser shearography for detection of fine cracks in concrete and masonry
Laser shearography is a refinement of electronic speckle interferometry (ESPI) that records a sheared image of the speckle interferogram. This produces a self-referenced image and consequently avoids the need for very precise positioning as required with conventional ESPI. Thus the laser shearography system can be used in the field under ambient conditions. It has been applied to detect fine cracks at early ages in concrete, with a resolution better than 10 microns. Moreover, the output of the system is a digital image which can be processed with image analysis software to yield statistics on the crack distribution such as length, width and preferred orientation, that can be used to diagnose the cause of the cracks. Since it is a nondestructive method it can be used to make repeated measurements on the same location over time, and thus monitor the propagation of cracks. It has also been used to detect cracks and other flaws in historic brick masonry buildings including the Blair House in Washington, DC.
Laser shearography for detection of fine cracks in concrete and masonry
Laser-Scherographie zum Nachweis feiner Risse in Beton und Mauerwerk
Livingston, R.A. (author) / Ceesay, J. (author) / Amde, A.M. (author) / Newman, J.W. (author) / Wallace, D.J. (author)
2006
10 Seiten, 11 Bilder, 13 Quellen
Conference paper
Storage medium
English
LASER SHEAROGRAPHY FOR DETECTION OF FINE CRACKS IN CONCRETE AND MASONRY
| British Library Conference Proceedings | 2006
Application of laser shearography for detecting microcracks in concrete
| British Library Conference Proceedings | 2007
| British Library Online Contents | 2006
Nondestructive Evaluation of Concrete Structures by Digital Shearography
| British Library Conference Proceedings | 1993