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Eddy current method for detecting sub-surface defects in metallic substrates, e.g. for detecting corrosion defects in aircraft, based on inspection of components using Eddy current probes of different frequencies
Eddy current method for detecting sub-surface defects in metallic substrates, e.g. for detecting corrosion defects in aircraft, based on inspection of components using Eddy current probes of different frequencies
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机译:用于检测金属基材中亚表面缺陷的涡流法通过使用不同频率的涡流探头检查组件来检测飞机的腐蚀缺陷
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摘要
Method in which Eddy currents of upper and lower frequencies are induced in a component under test. The current amplitude at the substrate surface is measured and the current field of the upper frequency Eddy current probe is subtracted from the field of the lower frequency probe, which enable a defect to be detected. Independent claims are made for a method for quantifying the volume of a sub-surface defect and a system for generating an outline of a sub-surface defect using Eddy current testing.
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