Research On Key Technologies Of Small Volume Pulsed Laser Circumferential Eight-quadrant Detection

Using of guided conventional ammunition to intercept air attack has gradually attracted the attention and research of researchers.Due to the limitations of its small size,manufacturing cost,and power supply,conventional small-sized ammunition has low azimuth detection accuracy and insufficient system ranging capabilities.At the same time,the domestic research on the detection characteristics of the linear laser used in the partitioned laser circumferential detection system is weak,so it is of great significance to carry out the research on the small volume multi-quadrant laser circumferential detection system.To research multi-quadrant laser peripheral short-range detection of small-volume conventional ammunition,the laser echo power model is combined with the characteristics of linear lasers to study the echo characteristics of targets of different shapes.The shape characteristics of the strike target,the effects of different shapes of the incoming target on the linear laser detection echo were studied by simulation and experiment,and the error of the target distance caused by the severely distorted echo was analyzed;The light field principle and statistical optics method analyze the impact of high velocity gas flow field on the target echo during the hypersonic rendezvous of the ammunition.Based on the principles of several common echo time discrimination methods,the error of detected distance under aero-optical effect is analyzed.Using the method of one transmission and double reception,without increasing the number of system transmission and reception,a pulsed laser eight-quadrant circumferential detection system was designed.The statistical method is used to study the relationship between the system operating frequency and the target capture rate.Finally,a static simulation experiment was performed on the designed principle prototype to verify the detection performance of the circumferential detection system.The ranging error of the two ranging methods of the detection system and the system's limit detection distance capability were experimentally studied.Detection distance of system designed is up to 3m,while the ranging error is less than 0.5m.The research results provide a certain design reference and theoretical basis for the multi-quadrant zoned laser circumferential detection system.