Image analysis of hardened concrete : performance enhancement of the Automated Concrete Evaluation System (ACES).
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2006-01-01
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Alternative Title:Performance enhancement of the Automated Concrete Evaluation System (ACES).
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Abstract:Since 2001, the Missouri Department of Transportation and National Nuclear Security Administration’s Kansas City Plant,
operated by Honeywell Federal Manufacturing & Technologies, have collaborated on three CRADA’s (Cooperative
Research and Development Agreements) to develop a fully automated machine vision system to perform the analysis of
the air void structure of concrete according to the ASTM linear traverse method. The first two CRADA’s were focused on
the development of a prototype system, designated ACES, for Automated Concrete Evaluation System. This prototype
included a computer controlled two-dimensional stage and sample holder, a vision system consisting of a microscope, a
digital black-and-white camera and analog frame grabber, a personal computer, and customized software to perform the
image acquisition, analysis, and reporting. Initial evaluations of the accuracy of the ACE system relative to experienced
human operators at MoDOT were quite positive. However, ongoing validations to baseline performance of the software
against actual manually derived results provided data indicating that additional software developments were required to
ensure that the results provided by the ACE System are consistent with those obtained manually. As a result, a third
CRADA was initiated to improve the performance of the ACE system to consistently apply the ASTM linear traverse
method and to improve the accuracy of the system relative to the results obtained by human experts.
In 2003, MODOT expanded the scope of this effort by initiating and leading a national, pooled fund effort under
sponsorship by the Federal Highway Administration. This pooled fund effort included 13 state transportation departments
(Arkansas, California, Colorado, Illinois, Indiana, Iowa, Minnesota, Missouri, Montana, Nebraska, Ohio, Virginia, and
Wisconsin).
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Main Document Checksum:urn:sha256:b35419f88553ea8a7a6a7dbb718c27aa7f057b59c53c00e4d32e828fe228da50
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