Development Of Uncooled Infrared Thermal Imaging Module Based On UL03262

In recent years,with the intensified military competition and the expansion of civil needs,infrared thermal imaging technology,especially uncooled infrared thermal imaging technology has become the focus of research in various countries,and the development of the uncooled infrared thermal imaging system with high performance,low cost and low energy consumption has been accelerated.According to the topic of "Development of Uncooled Infrared Thermal Imaging Module Based on UL03262”,in this paper,based on the development of infrared thermal imaging technology in China,and the infrared focal plane arrays imported from France was used to develop the miniaturized uncooled infrared thermal imaging movement components in order to meet the requirements of China's military applications.Aiming at the current situation of western countries' blocking products and technology,combined with the trend of miniaturization of uncooled infrared thermal imager,in this paper,the development status and application foreground of uncooled infrared thermal imaging technology were analyzed,and the hardware circuit design of the advanced uncooled infrared thermal imaging system was studied.Based on the more mature SOPC technology,the Nios soft-core processor has been used in the FPGA,and the high-performance signal processing board has been built by adopting FPGA+DDR2 hardware architecture.The miniaturization design of uncooling infrared thermal imaging components of the hardware system by the hardware design of low noise power supply and high performance uncooled infrared focal plane detector driver circuit.Among them,the signal processing board to achieve un-cooled infrared thermal imaging component power supply voltage generation,digital signal processing,analog video conversion and other major functions,using the FPGA+DDR2 hardware architecture to replace the traditional FPGA+DSP hardware architecture.The main chips selected AlteraJ s Cyclone IV series FPGA,and Micron's MT47H64M16 memory.On the one hand,they have faster processing,on the other hand,they take up less space,so,they can fully be qualified the need of uncooled infrared focal plane detector driver timing and digital image supply requirements real-time processing and transmission needs.In the low-noise power circuit module design,fully consider the power supply integrity design,for the digital power supply using high efficiency DC-DC,for analog power supply using low noise LDO.Optimizing in the PCB design and layout of the wiring process and installing the decoupling capacitors to ensure the power of low noise and stability;In the drive circuit design,the detector bias voltage module selects the low-noise reference source and low-noise operational amplifier to construct the low-pass filter scheme,and detector output signal digital-analog conversion module select single-ended turn signal conditioning and low-power ADC converter.Based on the above design scheme,the schematic diagram and the design of the PCB have been finished.The debugging and verification have been finished and the good image display effect has been achieved,finally,it has surpassed existing domestic similar products and has achieved similar foreign level.