非致冷红外焦平面的信号采集及预处理

【作者】 凌小兵；

【导师】 钱芸生；

【作者基本信息】 南京理工大学 ， 物理电子学， 2004， 硕士

【摘要】 红外技术作为一种发现、探测和识别目标的重要手段在军民两用技术中有着广泛的应用，焦平面阵列技术的发展极大地提高了系统的性能。由于非致冷微辐射热计型红外焦平面阵列致造技术的重大突破，使得红外系统能够实现体积小、重量轻、价格低、可便携化，极大地推动了红外系统在各领域中的广泛应用，因此非致冷微测辐射热计红外成像技术成为今后发展的重点之一。 本论文就“非致冷红外焦平面的信号采集及预处理”这一课题，介绍了红外焦平面探测器的应用、现状、发展与非均匀校正的算法；设计了非致冷红外焦平面阵列的驱动电路和温控电路，使用Altera公司的EPM7128AETC设计时序电路，实现了电路的小型化，VHDL语言设计时序逻辑方便了调试过程中电路逻辑的修改：高速并行的AD9240负责信号的采样和量化，并利用高速FIFO对数据进行缓存，完成了非致冷红外焦平面阵列信号采集模块的设计；选择两点校正法，利用FPGA实现了图像的实时非均匀性校正和直方图统计；同时总结了系统的设计和调试经验，对调试时遇到的一些问题进行了详细、深入的分析。更多还原

【Abstract】 Infrared technique is used widely in both military field and civilian field as means of finding, detecting and identifying the targets. The development of infrared focal plane arrays technique promotes the performance of infrared system. Great achievements were achieved in the manufacturing of uncooled microbolometer infrared focal plane arrays. By this technique, infrared system can be made in the formation of small volume, light weight, low price and being portable. It promotes the utilization of infrared system greatly in all fields. So the techniques of uncooled microbolometer infrared imaging become one of the main points from now on.The title of this paper is THE SIGNAL COLLECTION AND PRETREATMENT OF UFPA. It details the application, status, development and nonuniformity correction method of UFPA. The development of drive circuit and TEC circuit is introduced in detail. The EPM7128AETC is used as hardware design platform and VHDL is employed to describe the driving sequencer so that the drive circuit is miniaturized. Analog signals are sampled by AD9240 that is a high speed and parallel A/D sampling chip. FIFO is used as a cache in order to design the module of signal collection of UFPA. Two-point real-time correction and histogram statistics of the images are completed with Field-Programmable Gate Arrays (FPGA). In addition, the system design and debug experiences are summarized and analyzed in detail.更多还原