小口径引信膛内感应储能磁场穿透特性

The Magnetic Field Penetration Characteristics in Bore of Small Caliber Fuze Using Inductive Energy

为解决小口径电子引信设计空间小的难题,结合引信可编程感应装定技术,提出在弹丸发射前进行信息装定的过程中存储感应能量为引信供能。该方法节省了安装电源所需的空间,为小口径弹药的电子引信电源设计提供了一种新的思路。为此建立小口径膛内电磁感应数学模型,并分析非铁磁性金属炮管内电磁场穿透特性。分析得出,外激电源谐振频率只有小于5 kHz,才能保证穿透后的磁场强度为信源磁场强度的80%;随着信源磁场频率的增加,穿透后的磁场强度呈指数规律衰减。实验表明,利用上述理论设计的某小口径感应储能引信原理样机,性能满足引信的技术要求。该结论能够用来指导膛内小口径引信感应装定及感应储能的设计。

A method of which the stored inductive energy is provided for fuze in the process of information setting before a projectile lauch was proposed in order to solve the problem of small room for designing a small-calibre electronic fuze.This method,which can save the space of extra fuze power,provides a new way to design fuze power.Therefore,a mathematical model of electromagnetic induction in the bore was set up.The characteristics of magnetic field penetrating through the metal gun barrel made of nonferromagnetic material were analyzed.The analyses results show that the magnetic field intensity can be 80% of the source after penetration only if the frequency of external electromagnetic excitation should be less than 5kHz.With the increase in the frequency of source magnetic field,the magnetic field intensity is exponentially attenuated after penetrateion.The experimental results show that the inductive energy storage fuze prototype designed according to the above-mentioned theory meets the technical requirements of small calibre fuze.And the analyses conclusion of magnetic field penetration characteristics is helpful to design the inductive energy storage fuze in bore.