Research On Components Of Uncooled IRFPA Imaging System

Infrared imaging technology has been widely used in military,security,and industrial fields due to its immunity to illumination conditions,climate,and environmental factors.With the rapid development of infrared imaging technology,uncooled IRFPA(infrared focal plane array)imaging system components have become one of the main development directions in the field of infrared thermal imaging due to their advantages of small size,low power consumption,and low cost.As the core of the infrared imaging system,the characteristics of uncooled IRFPA arrays determine the performance of the imaging system components.Therefore,designing and researching infrared imaging system components around uncooled IRFPA arrays not only has important theoretical significance but also has practical engineering value.This paper aims to design and develop uncooled IRFPA imaging system components,conduct in-depth research on the theoretical basis of uncooled infrared imaging systems,the development of imaging component hardware and software platforms,and the data processing of infrared images.The system uses a single FPGA architecture as the signal control processing unit and designs the hardware circuit and software system of the infrared imaging component around a large area uncooled IRFPA.Based on the analysis of component functions and parameter requirements,hardware platforms such as uncooled IRFPA driving circuit,signal processing circuit,bias voltage generating circuit,and data transmission circuit are designed and implemented.Software functional modules such as FPGA timing drive,image data acquisition,digital signal processing,image display output,and data transmission are completed.Based on this,research is conducted on the non-uniformity of the original infrared image,and the correction effect and characteristics of typical non-uniformity correction algorithms are analyzed and compared.The non-uniformity correction algorithm based on radiation source calibration is implemented in FPGA.Finally,through hardware testing and Modlsim software timing simulation,the hardware circuits and software modules are verified,and the verification results meet the expected targets.Through non-uniformity testing,it is verified that the non-uniformity of the corrected infrared image is reduced from 13% to below 1%.The results show that this paper has realized the imaging system component based on uncooled IRFPA and corrected the original infrared image on FPGA,which meets the design requirements.