激光光幕靶测速系统设计

The Design on Laser Screen Velocity Measuring System

针对室内外全天候条件下高精度测量弹丸速度的需求,设计了一种新型激光光幕靶.该激光光幕靶采用线性排列的红外激光管阵列作为发光光源,两列平行排布的红外光敏二极管作为接收器件,形成具有两个光幕的双光幕光幕靶.采用主动式光源,该测速系统测试效率高、精度高且不受天气影响,一次测量系统的CPLD数字逻辑电路可计算得到弹丸的两个飞行时间,便于互相比较和对照.野外实弹试验表明,该测速系统灵敏度高,工作稳定可靠,测试数据准确.

In order to measure the velocity of projectile with all weather, this paper designed a novel laser screen method which adopted linear infrared laser diode array as luminous source and two rows of infrared photodiodes as receivers so that two screens were formed. The system has the advantages of high efficiency, high accuracy and not affected by the weather. The CPLD digital logical circuit of this system calculates two flight time of projectile with a single measurement which can be compared with each other. The system per- forms reliably with high sensitivity and the test data captured by this system has been proved to be accurate.