抑制弧光干扰的电磁炮光幕测速方法

摘要

电磁轨道炮发射中，电枢与导轨间的高速、带电滑动，使电枢出炮口时产生强烈的弧光，严重干扰激光光幕测速系统对电枢速度进行测试。通过对试验数据进行计算、分析，得到电枢与弧光从炮口至测试点之间的运动关系。通过对弧光光谱进行测量，提出改进方法，选择中心波长为780 nm的窄带干涉滤光片对弧光进行抑制，改进激光光幕测速系统，并进行了相应试验。结果表明：改进后的激光光幕测速系统能有效抑制弧光干扰，在相对复杂的测试环境中，具有较高测试性能，满足电磁轨道炮速度测试要求。%When the electromagnetic railgun is in emitting,the hi-speed electrified sliding between armature and guide rail generates strong arc when armature is getting out of gun. This severely interferes armature velocity measurement test with laser screen measuring system. This article computes and analyzes test data and finally gets the movement relations between armature and arc from gun muzzle and test point. Through measuring arc spectrum improved method has been proposed. Using narrow-band interference filter with 780nm central wavelength to suppress the arc,and improving laser screen measurement system,the test was done. The result shows that improved laser screen measurement system can effectively suppress arc interference. In relatively complex environment,the improved system has relatively higher testing performance to meet the requirements of electromagnetic railgun velocity measurement test.