Detector Based On 384 ¡Á 288 Uncooled Infrared Image Processing Technology

The uncooled infrared imaging system plays an important role and has a large market, whether in military fields or civilian fields.For the pressing military and civilian requirments, the infrared imaging technology is rapidly developing.To improve the resolution of the infrared image and meet the need of usage in any situation,the 384×288 detector is gradually replacing the 320×240 detector and becoming the preferred detector.In the beginning of this paper,the development and actuality of the infrared imaging technology,the basic conceptions of embedded system and FPGA technology are introduced. Then we make a study on the characteristics of infrared radiation,the operational principle of infrared optics system and focal plane array.On the basis of the old 320×240 infrared imaging system,this paper provides a integrated design plan for the 384×288 infrared imaging system by using the UL03041 detector.In this new system,the FPGA chip is replaced by a new type of EP3C55F484CSN,and a SDRAM(HY57V93220T) memory is added to the circuit.To meet the requirement of system,we did a lot of work to improve the system performance, including:improving the on-chip logic modules and NiosⅡprocessor inside the FPGA,such as the system timing management,the driving control of IRFPA,the switching of system working model,the switching between video interface and menu interface,the write and read operation to the SDRAM.Upon these improvements and debugging in hardware and software, the infrared image finally comes out on a monitor.