【摘要】 文章使用ZYNQ开发板设计了一套基于电磁感应理论的成像系统。该系统使用8个铜制线圈组成阵列传感器，以Xilinx公司研发的ZYNQ-7000来设计单通道高速数据采集系统。采用14位的AD9240作为模数转换芯片，同时以AD9767与AD9240形成回路以检测激励信号。系统的最高采样率能达到32MSPS，可以满足成像过程对于采样率的需求。外围电路与FPGA之间通过SPI总线通信，并利用Vivado和SDK软件进行联合开发，利用相敏检波算法对采集到的信号进行幅值与相位的分离与提取。通过对阵列传感器检查范围内放置金属样品进行成像实验，从实验结果中可以看出，论文所设计的系统可以满足准确采集电磁信号，并可利用采集信号进行电磁层析成像。更多还原

【Abstract】 In this paper,an electromagnetic imaging system based on ZYNQ is designed to achieve electromagnetic imaging using array sensors. This system uses the ZYNQ-7000 developed by Xilinx Company to design a single channel high-speed data acquisition system. The 14 bit AD9240 is used as the analog digital conversion chip,and the AD9767 and AD9240 form a loop to detect the excitation signal. The highest sampling rate of the system can reach 32MSPS,which can meet the requirements of the imaging process for the sampling rate. The peripheral circuit communicates with FPGA through SPI bus,and is jointly developed by Vivado and SDK software. Phase sensitive detection algorithm is used to separate and extract the amplitude and phase of the collected signal. Through the imaging experiment of metal samples placed within the inspection range of the array sensor,the experimental results show that the system can meet the requirements of accurately collecting signals,and can use the collected signals for electromagnetic tomography.更多还原