The Feasibility Research of Array Probe Technique on Eddy Current Inspection of Tube Sheet Area

Bobbin probes are used to inspect tubes of the condenser,but the inspection is subjected with the "blind area" problem near the tube sheet.Based on this inspection requirement,the application of CXB(Circ X+ Bobbin probe,a kind of array probe) on eddy current inspection of tube sheet area is under discussed.Experiment results by mockup show that CXB is capable of solving "blind area" problems encountered in tube sheet area with bobbin technique.In addition,the problem of CXB quantitative evaluation of defects is figured out successfully. Finally,site results are shown.