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| pplication of Improved ART Algorithm in Concrete Ultrasonic Imaging |
| Yao Fan, Yanli Chu |
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Abstract Algebraic Reconstruction Technique (ART) algorithm is the
conventional iterative algorithm of concrete ultrasonic CT
tomography, it has many shortcomings, such as its calculation
accuracy is not high, convergence speed is slow slower, and the
peripheral units of abnormal body is affected by abnormal body and
so on. An improved algebraic reconstruction technique algorithm
based on block iteration is proposed in this paper. The main idea of
the new algorithm is to divide the meshes into blocks step by step,
and to compute the wave speed of each block by ART algorithm, put
the wave speed of next higher level units as the iterative initial
value of next lower level units. Do this process until each block
can not be divided any more. Through continuous division block unit,
finally reach the purpose of rebuilding the structure image of test
area in concretes. Computer simulation and concrete model of
ultrasonic computerized tomography show that ART algorithm based on
block iteration is capable of reconstructing moderate, improving
precision of computing, and weakening the influence caused by
abnormal area.
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| DOI:10.12733/jics20105576 |
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