A METHOD AND APPARATUS FOR PHASE SENSITIVE DETECTION OF EDDY CURRENT MEASUREMENTS
摘要
<p>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.</p>
申请公布号
WO2009101431(A1)
申请公布日期
2009.08.20
申请号
WO2009GB50119
申请日期
2009.02.06
申请人
GE INSPECTION TECHNOLOGIES LTD;DALY, ALAN;QIAO, XIAOYU;MAYES, IAN CHRISTOPHER;HANSEN, JOHN
发明人
DALY, ALAN;QIAO, XIAOYU;MAYES, IAN CHRISTOPHER;HANSEN, JOHN