A FPGA Based Platform for Multi-Frequency Eddy Current Testing

摘要

We developed a highly integrated, Field Programmable Gate Array (FPGA)-based digital multi-frequency eddy current platform which is capable of detecting surface breaking and subsurface cracks in non-magnetic plates. Excitation signal generation, receiving signal demodulation, and USB communication were all implemented inside a Xilinx FPGA (Spartan III). Multi-frequency test results provide rich information about a crack and form the base for crack characterization and identification.