The Design of a Digital Magnetic Induction Tomography (MIT) System for Metallic Object Imaging Based on Half Cycle Demodulation

摘要: This paper presents several important aspects of a highly integrated, Field Programmable Gate Array (FPGA)-based digital Magnetic Induction Tomography (MIT) system for metallic object imaging applications. Excitation signal generation, receiving demodulation, and channel multiplexing control are all implemented inside Xilinx FPGA (Spartan III). A novel demodulation method using only half the cycle is proposed implemented, which improves operation speed by two folds. geometrical scaling relationship has been discovered MIT sensors, particular design implemented. Two reconstruction algorithms (Tikhonov Regularization Total Variation method) applied to experimental data. The performance verified.