发明名称 |
A METHOD AND APPARATUS FOR PHASE SENSITIVE DETECTION OF EDDY CURRENT MEASUREMENTS |
摘要 |
A method of detecting defects using eddy currents is disclosed. The method comprises: exciting eddy currents in a test material using an eddy current probe driven by a drive signal; detecting induced eddy currents in the test material; converting the detected signal into integer values using an analog to digital converter; and adding or subtracting the generated integer values to or from each of two accumulators, or taking no action, so that one accumulator produces a value proportional to one component of the detected signal and the other produces a value proportional to another component of the detected signal and using these values to detect the presence of a defect.
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申请公布号 |
CA2713772(A1) |
申请公布日期 |
2009.08.20 |
申请号 |
CA20092713772 |
申请日期 |
2009.02.06 |
申请人 |
GE INSPECTION TECHNOLOGIES LTD |
发明人 |
DALY, ALAN;QIAO, XIAOYU;MAYES, IAN CHRISTOPHER;HANSEN, JOHN |
分类号 |
G01N27/90 |
主分类号 |
G01N27/90 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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