大靶面探测光幕灵敏度分析与修正

Analysis and amendment on the sensitivity of large target area light screen

为了解决室内10 m×10 m大靶面探测光幕灵敏度分布不均匀的问题,研究了镜头光幕探测传感器灵敏度分布规律。依据镜头式光度学理论,分析了影响光幕探测灵敏度的主要因素,建立探测灵敏度数学模型,获得幕面内不同位置的弹丸过幕信号幅值变化趋势。最终提出了灵敏度修正方案,通过改变光幕靶不同位置光源的发光亮度,来实现探测幕面内灵敏度分布均匀化。修正后的探测光幕采用气枪弹验证可知,灵敏度能满足大靶面灵敏度均匀化要求。

In order to solve the problem of unevenness in sensitivity distribution of 10 m ×10 m large target area detection in indoors, the sensitivity distribution of the lens light-screen detection sensor was studied. According to the theory of lens photometry, the main factors influencing the sensitivity of light-screen detection were analyzed. The mathematical model of detection sensitivity was established, and the change trend of the amplitude of the projectile signal in different positions of the light-screen was obtained. Finally, the sensitivity correction scheme was proposed, and the evenly sensitivity distribution of the detection screen was realized by changing the luminous brightness of the light source at different positions. Using the air gun to verify the modified detection light-screen shows that the sensitivity to meet the evenly requirements of large target area sensitivity.