大靶面激光光幕靶研究

针对大靶面、高精度弹丸速度测量的要求,提出一种新型激光光幕靶弹丸速度测量系统。该系统采用大功率90°扇形线状激光器做为光源,两列高灵敏度光电二极管阵列作为接收装置,当弹丸穿越激光光幕面时,遮挡了部分投射在光电二极管上的光线,光电二极管产生微弱电信号,经放大、整形后输出一个脉冲信号,触发计时仪开始或停止计时。两台同样的装置配合测时仪,便可组成激光光幕靶测速系统。经实弹实验证明,该系统具有高灵敏度和高精度的特点。

Study of Large Sensor Area Laser Screen

In order to meet the measurement requirement of larger sensor area and high precision,a novel laser screen system was designed to measure the velocity of projectile.In this laser screen,a high-power linear laser diode which has a fan angle of 90°was used as it＇s transmitter,two array of high-sensitive photodiode was used as it＇s receiver.When a projectile is flying through the sensor area,the projectile creates a shadow signal which is amplifed and shaped ,and then output a ＂START＂ or ＂STOP＂ trigger implus signal to the time recorder.Two laser screens and a time recorder consist a laser screen system.The laser screen system designed has high sensitivity and high prcision which was proved through actual firing.