Hard Target Penetration Fuze Detonating Measure Method

The effect of the penetrating projectile burst depth is extremely significant to the damage of the ammunition, so the penetration depth measurement is very important for the design and test of the penetration fuze. High-speed photography and pulse x-ray high-speed photography that used in traditional fuze test were not suitable for penetration depth test. It is an urgent problem for penetration fuze test to researching a new technique of penetration depth measuring.Magnetic field is easy to penetrate most substances. The generation, control and detection of the magnetic field are relatively simple. Modulated magnetic field was produced in the target, and then the penetration depth could be characterized by the variation of the magnetic field on the penetrating path.This article consists of the following elements:(1)The concepts of the hard target penetration fuze and the defect of the traditional fuze test method were introduced in this paper. A new method based on magnetic detection technology was proposed to measure the penetration depth of the hard target penetration fuze.(2) The excitation of the magnetic field was designed, which produced modulated magnetic changing with the spatial position. Distribution laws of the magnetic field on the profile and axis of the target were got by computing and simulating the shielding effect of the modulated magnetic field.(3)The hardware circuit of the magnetic field measuring apparatus was designed in this paper.(4) The testing laboratories of the program was completed and compared with the simulation, which verified the feasibility of the program. Analysis and recommendations were proposed for the late target test of penetration depth.In this paper, the new method based on magnetic detection technology to measure the depth of hard target penetration fuze had been verified by the simulation and experimental. The results showed that:the intensity of the modulated magnetic field was proportional to the current of the exciting coils and the cycle of the modulated magnetic field was four times of the coil spacing. The periodicity of the modulated magnetic field could characterized the fuze penetration depth, and the measurement accuracy could be adjusted conveniently by the gap between the coils. These researches laid the foundation to applicate the program to penetration fuze test.