A flexible eddy current array sensor consists of six array units（ spiral coil） is designed

establish electromagnetic field model for flexible eddy current array units based on electromagnetic field theory

the magnetic field strength formula in radial and axial of flexible array unit coil are derived

simulation analysis on relationship between array unit coil magnetic field strength and current

coil gap

inner and outer diameters and other parameters

which have a certain reference value for development of flexible eddy current array sensor.