基于身管地磁感应场的弹丸炮口速度测量方法

Projectile Muzzle Velocity Measurement Based on Body Tube Geomagnetic Induction Field

针对目前常规火炮弹丸炮口测速方式中,外测法不能实现自主智能化调控,弹载内测法需要通过测量其他参数间接解算出速度,无法直接测量,过程较为复杂的问题,提出基于身管地磁感应场的弹丸炮口速度测量方法。该方法通过有限元仿真,得到弹丸运动过程中,炮口磁场分布曲线导函数中两特征点间距离固定的分布特征,利用该距离除以磁传感器对应运动时间可实现炮口速度测量。仿真实验结果表明,当地磁矢量方向与射击方向夹角小于70°时,特征点极易识别,可实现炮口速度的直接测量,为未来实际检测提供了理论基础。

In order to solve the problem that the muzzle velocity measurement method of conventional artillery projectiles could not achieve autonomous intelligent regulation and control by the external measurement method,and the velocity could not be measured directly because the internal measurement method had to measure other parameters,the muzzle velocity measurement method of the projectile based on the geomagnetic induction field of the body tube was proposed.The method obtained the distribution characteristics of a fixed distance between two characteristic points in the muzzle magnetic field derivative function curve during the projectile motion through finite element simulation,and the muzzle velocity measurement could be achieved by dividing the distance by the corresponding motion time of the magnetic sensor.The simulation experiment results showed that when the angle between the direction of the local magnetic vector and the firing direction was less than 70°,the characteristic points were extremely easy to identify,and the direct measurement of the muzzle velocity could be realized.