New Method for Suppressing Lift-Off Effects Based on Hough Transform
A major problem for crack or electromagnetic property measurement in eddy current detection technique is the lift-off effect. The nonzero value of lift-off distance tends to smear out the discontinuity in the detected signal, causing errors detection. The paper shows the test results of lift-off effect in normalized impedance plane. Curves are transformed to Hough plane by Hough transform and consequently the lift off effect is suppressed effectively. The method is convenient to distinguish different electromagnetic characteristic of material which can he used to detect crack or other flaws in material.
lift-off effect hough transform eddy current test non-destructive technique
Zhu Wen-long Shen Han-xin Chen Wen-xiang
Dept.of electronic Engineering Xiamen University Xiamen,China,361005 Dept.of Mechanical and Electrical Xiamen University Xiamen,China,361005
国际会议
长沙
英文
1597-1600
2009-04-11（万方平台首次上网日期，不代表论文的发表时间）