Information Fusion for Borescope and Eddy Current Integrative Nondestructive Testing Technique to Detect Defects in Aeroengine

Abstract

In nondestructive testing (NDT) it is important to have a high probability of detection (POD) and more reliable characterization of each defect. This can be gained by using several techniques combined into one. A borescope and eddy current integrative nondestructive testing system was presented. A dual probe containing an eddy current probe and a borescope was designed. This dual probe can in situ detect defects in aeroengine simultaneously, which can reduce the need for costly teardown. In this integrative system information fusion for the techniques is needful and possible. A method of borescope and eddy current information fusion was proposed using the Dempster-Shafer (D-S) theory of evidence. The primary experimental results show that the high reliable characterization of defect is gained using the information fusion.