Research And Design Of Embedded Real-time Acquisition Processing And Storage System For Spot Of Laser Illuminator

Precision-guided weapons have become one of the indispensable means of strike in modern warfare.Among them,laser semi-active guided weapons are becoming key equipment for countries to compete in recent years.The laser emitted by the laser irradiator in the laser semi-active guided weapon system is irradiated on the target being hit,and the seeker realizes the target tracking by tracking the laser spot in real time.The laser spot's irradiation accuracy and power density distribution on the target directly affect the strike performance of laser-guided weapons.Therefore,a highly integrated and independently portable laser spot acquisition processing and storage system is studied.For verification,testing and optimization of laser semi-active guided weapons The performance of the laser irradiator in the system is of great significance.This dissertation studies the real-time acquisition,processing and storage system of laser spot image based on embedded technology.Firstly,a technical scheme of real-time image acquisition,processing and storage system is proposed according to the requirements of the irradiation laser spot test.Based on the timing characteristics of the irradiation laser pulses and the control characteristics of the infrared and visible light cameras,a camera advance prediction synchronous trigger control method is designed.The detector detects the laser spot irradiation time and feeds back in real time.The main control device controls the opening and closing of the camera shutter according to the feedback pulse time and interval to realize the real-time and accurate capture of the laser spot in time sequence.Then the real-time processing of the laser spot image and the extraction of the centroid are studied.This method combines the pixel labeling method and the gray-scale barycenter method to propose and verify a gray-scale pixel-based labeling algorithm,and optimizes it to effectively reduce resource consumption.Finally,it studies the real-time storage technology of the solid-state hard disk and realizes the infrared and Real-time synchronous storage of visible light output image data.The system uses the XSW-640-TE1 high-resolution SWIR camera module and the laser spot and background target image output by the IMPRX ICL-B1411 high-resolution digital camera.The core controller Xilinx Zynq-7000 series FPGA chip ZYNQ XC7Z035-FFG676-2I as the main control unit,Samsung MZ-76E250 860 EVO solid-state hard disk as the image storage device,to achieve the acquisition,processing and storage of the two camera output images.This system analyzes,designs and simulates the overall technical scheme,hardware and software of the system.The verification results show that the system can achieve complete collection of the irradiated laser spot,solve the problem of off-target flash screen,store the laser spot image data in the hard disk in uncompressed BMP format,and extract and transmit the spot centroid.