激光天幕靶探测灵敏度分析与试验  

Analysis and testing of detection sensitivity for a laser sky screen

作　　者：毕鑫 李敬 党华昱 罗浩 王雪琪 田会[1,2] BI Xin;LI Jing;DANG Hua-yu;LUO Hao;WANG Xue-qi;TIAN Hui(School of Opto-electronic Engineering,Xi'an Technological University,Xi'an 710032,China;Shaanxi Province Key Laboratory of Photoelectric Measurement and Instrument Technology,Xi'an Technological University,Xi'an 710021,China)

机构地区：[1]西安工业大学光电工程学院,陕西西安710032 [2]西安工业大学陕西省光电测试与仪器技术重点实验室,陕西西安710021

出　　处：《激光与红外》2025年第4期526-532,共7页Laser & Infrared

基　　金：陕西省自然科学基础研究计划项目(No.2023-JC-QN-0679)资助。

摘　　要：针对常规测速天幕靶在自然光照低或夜间无法使用的不足,研究了可全天候使用的激光天幕靶。激光天幕靶的探测灵敏度与弹丸过幕信号的电压幅值呈线性关系,该参数直接决定了其性能及测速精度。根据激光天幕靶的工作机理及光度学理论,分析了影响探测灵敏度的主要因素,推导了弹丸从探测光幕内不同位置处穿过时反射的光功率的计算公式,仿真分析了探测光幕内不同位置的过幕信号幅值的变化规律。通过7mm钢珠实弹射击试验,采集的幕面内不同位置的过幕信号幅值变化规律与理论分析结果基本一致。研究的灵敏度数学模型为激光天幕靶在试验现场的使用与后续性能提升提供技术参考。Aiming at the shortcomings of the conventional sky screen that cannot be used in low natural light or at night,a lase sky screen with all-weather operation is investigated in this paper.The detection sensitivity of the laser sky screen is directly proportional to the voltage amplitude of the projectile signal,which ultimately determines its per-formance and the accuracy of velocity measurements.Drawing upon the mechanism of the laser sky screen and photo-metric theory,the main factors affecting the detection sensitivity are analyzed,the calculation formula of the reflected luminous power when a projectile passes through different positions within the detection light screen,and the changing rules of the signal amplitude of different positions within the detected light screen are simulated and analyzed.Through the shooting test with 7 mm steel balls,the distribution of the signal amplitudes at different locations within the screen aligns well with the predicted results.This research establishes a mathematical model for sensitivity in the context of laser sky screen applications in testing fields,providing a technical reference for ongoing performance enhancements.

关 键 词：武器试验与测试 探测灵敏度 光电探测 激光天幕靶 弹丸速度测量 

分 类 号：TJ02[兵器科学与技术—兵器发射理论与技术] TN249[电子电信—物理电子学]