Research On Image Acquisition And Signal Transmission System In Laser Alerting

With the advent of a new era and evolving international strategic landscape,laser technology has emerged as a critical area of focus for military research around the world.This is primarily due to the continuous advancements in science and technology which have led to significant developments in the field of laser technology.Laser warning technology has become an important issue internationally to address the increasing laser threats.However,how to quickly and accurately obtain information such as the wavelength,direction,and pulse width of the laser,and further accurately identify various information of laser equipment,is a problem that urgently needs to be solved in current laser warning technology.As such,the focus of this paper is to examine the multi-channel data acquisition and high-speed transmission technology for images in high-precision,wide-band laser warning systems used in comprehensive detection.The paper begins by conducting a theoretical analysis of the basic principles underpinning the two-dimensional grating diffraction laser warning systems.This includes performing theoretical derivations and calculations to determine the incident wavelength and angle of the laser.Building on this,the paper then analyzes the parameters of the visible near-infrared focal plane array detector,lens focal length and grating constant.The results of this analysis serve as the foundation for achieving high-speed data acquisition and transmission within the laser warning system.Secondly,in response to the problem of fewer signal acquisition channels and slower data transmission rate in traditional laser warning systems,a four-channel simultaneous sampling and USB interface high-speed transmission system based on FPGA control is designed.In the data acquisition part,the pre-stage two-stage differential operational amplifier idea of followup and filtering amplification is used to obtain high-quality electrical signals of the visible nearinfrared focal plane array detector.To attain high-speed and dependable data acquisition,a 14-bit four-channel simultaneous sampling high-speed analog-to-digital converter chip is utilized in the system.In the data transmission part,a USB interface transmission module and an upper computer graphical visualization interface are used to achieve high-speed data transmission and intuitive diffraction spot images.Following this,the programmable modules are simulated and analyzed to ensure they meet the system requirements.Subsequently,the hardware circuit design is completed based on these requirements.Finally,a test system is established to verify the differential output of the pre-operation amplification circuit.The USB interface transmission module is tested for reliability and speed using USB Control Center and Streamer.Laser experiments with wavelengths of 532 nm,1064nm,and 1313 nm and different incident angles are used to simulate visible light and nearinfrared light for the two-dimensional laser warning system,and different integration times are used for testing to analyze the imaging effect of its optical components.Experimental verification of the system confirms that the reliability test error rate is zero,while the interface receiving rate reaches 45MB/S.These results indicate that the two-dimensional laser warning system meets the requirements for high-speed image acquisition and real-time transmission,thereby enhancing adaptive adjustment of integration time for different laser intensities and complex backgrounds.