Testing Application of Array Eddy Current Probes to Bolts

A method combining numerical and experimental methods was used to determin the parameters of the array current probes. The transverse cracks at the root of bolts were scanned quickly and exactly. The eddy current array probe designed was able to test the root of bolts effectively and to avoid frederick error rates. Compared with single probe testing, the array eddy current probes had longer life and simpler mechanical design.