Crack detection in concrete using real-time ESPI technology

Zongliang Jia*, Surendra P Shah

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

5 Scopus citations


Based on laser optics, speckle interferometry is sensitive to very small changes in displacement or deformation. Electronic speckle pattern interferometry (ESPI) combines optics and electronics together to provide full-field observation and analysis with accuracy and sensitivity in a sub-micron range. As a state-of-the-art non-destructive testing/evaluation technology (NDT/NDE), electronic speckle pattern interferometry (ESPI) was successfully used to detect very small cracks in concrete. The fast image processing made it possible to conduct real-time testing on concrete structures. The laboratory experiments have also shown that it is possible to bring the ESPI technology to field applications, such as NDE of aging airport pavements, bridges, and other aging infrastructure.

Original languageEnglish (US)
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
PublisherSociety of Photo-Optical Instrumentation Engineers
Number of pages7
ISBN (Print)0819418080
StatePublished - Jan 1 1995
EventNondestructive Evaluation of Aging Aircraft, Airports, Aerospace Hardware, and Materials - Oakland, CA, USA
Duration: Jun 6 1995Jun 8 1995


OtherNondestructive Evaluation of Aging Aircraft, Airports, Aerospace Hardware, and Materials
CityOakland, CA, USA

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics


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