Abstract
Considering the industry demand for enhancing the mobility and portability the nondestructive testing instrument, a novel portable Alternating Current Field Measurement (ACFM) intelligent instrumentis developed and tested in this paper based on the ACFM principle. The CPU and DAQ (data acquisition) module, core hardware of the portable ACFM intelligent instrument, are designed miniature and modular to make it possible to realize both high speed data acquisition and processing in function and portability in structure. The ACFM defect intelligent recognition software is developed to process data for crack sizing. Finally, the real crack detection experiments are designed and conducted to test the efficiency of the portable ACFM instrument. The results show that the portable instrument can recognize cracks intelligently and accurately and it is easy to use and convenient to carry.
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