基于引信炮口磁探测的单线圈被动测速原理

现有的炮口实时测速都是通过改造发射系统和火控系统完成的,存在成本高,改造技术复杂和存在交联电路等诸多弊端.针对这些问题,提出了一种新的弹上被动测速方法.在分析弹丸运动、磁感应强度变化和单线圈传感器输出信号关系的基础上,提出通过捕获弹丸开始加速和出炮口时线圈输出的两个信号,来实现被动测速的原理,阐述了单线圈被动测速需要考虑的线圈设计、测试误差分析、盲区问题、信号处理以及装定对测速的影响等工程技术问题,列举了单线圈测速的若干优点,指出了需要进一步探讨和研究的问题.

The Passive Velocity Measurement Method Using Single Coil Based on Muzzle Magnetic Detection

The current online muzzle velocity measurements are completed by changing the launch and fire-control systems,which has the shortages of costliness,complexity of rebuilding technology and the existence of linkage circuit etc.To solve the problems of traditional velocity measurement based on muzzle magnetic detecting,a new passive method is presented which is based on the relationship among the movement rule of ammunition,the change of magnetic density and the voltage outputs produced by single coil fitted in fuze.The movement of single coil in barrel produces two characteristic signals respectively at the ammunition's moving start and end moments in the barrel.The mean velocity can be calculated with the time interval of these two spaced outputs.Some practical problems,such as the coil's design,analysis of measuring error and blind zone,signal processing and the setting influence on measuring,are considered for the new measuring system.At last,the advantages of this method are analyzed and the further research work is pointed out as well.