天幕靶光电探测性能改善研究

建立了LBS-1型立靶精度测量系统中的天幕靶,对天幕靶探测性能存在的各种影响因素,如:光电转换接收器件及其探测电路、天空背景亮度的强弱等进行了分析.提出选择拼接长条形、具有高频响应、低噪声的光电接收管作为探测器件,采用可调光阑、多路可调比较电压、提高电路放大倍数的措施,可以提高天幕靶的探测灵敏度.天幕靶能在大于500 lx条件下正常稳定工作.实践证明,采取的改善措施,工作可靠、稳定性好,达到了改善天幕靶光电探测性能的目的.

A Study on Improving the Performance of Photo-electricity Detecting of Sky-screen

A LBS-1 fire accuracy measurement system was set up. Influence factors including detection circuit of photo-electricity transforming and accepting, and brightness of sky background, were analyzed. Some measures were put forword to improve the detecting sensitivity, such as choosing the photo-electricity tube with linked rectangle, high frequency response, low noise as detection parts and applying adjustable diaphragm, multi-adjustable comparison voltage. So shy-screen can work well over 500lx. It is proved that the improving measures work reliable with better stabilization, and can improve the performance of photoelectricity detection of sky-screen.