【摘要】 为满足调频连续太赫兹波成像系统探测器数据采集的需要,研究了一种太赫兹信号采集系统。系统选取ADI公司生产的具有速度快、效率高等优点的AD7626模数转换器,并采用Altera公司的Cyclone系列FPGA作为主控芯片。从数据采集可靠、稳定、高效的角度出发,用模块化的方法给出了系统的软硬件设计。实验结果表明,系统能有效地复现输入信号,满足太赫兹成像系统图像重建的需要。更多还原

【Abstract】 In order to meet the requirement of signal acquisition system of the frequency modulation continuous terahertz imaging system,a terahertz signal acquisition system is proposed.The system takes ADI AD7626 as the ADC,which has high speed and high efficiency,and uses Altera’s Cyclone series FPGA as the control chip.The whole hardware and logic designs are described modularly in terms of the performance of reliable,stable and high efficiency.The experimental results show that it meets the need for image reconstruction of terahertz imaging system since the signal acquisition system can effectively reproduce the input signal.更多还原