Research On Composite Technology Of Magnetic And Capacitive Detection

Fuze of anti-tank projectile mainly uses the inherent characteristics of the tank to detect and identify the target.Multi-detection system can effectively improve the reliability of the tank target detection,and can greatly improve the anti-jamming performance.Based on the steel and structural characteristics of the tank,this paper studies the composite technology of magnetic and capacitive detection aimed at the tank target.First of all,based on the working principle of the two detection systems,a composite fuze system was established.Fuze senses the magnetic field through tunnel magnetoresistive(TMR)sensors and receive capacitive information through a coupled detector.Secondly,through the establishment of tank mathematical model,the theoretical formula of tank magnetic field is deduced.With the help of software tools,the numerical and variation of magnetic field intensity corresponding to the three axis of the tank in the horizontal direction 10 m and the vertical direction 2m are calculated and analyzed.Theoretical calculations combined with field measurements to study the magnetic properties of the tank.The relationship between the detection voltage and the change of the capacitance between the electrodes caused by the target is derived,and the capacitance characteristics of the tank are experimentally studied.Thirdly,the possible interferences and their interference characteristics in the ballistic environment are studied.Combined with the magnetic,capacitance and interfering characteristics of the tank,a target recognition algorithm is designed.Finally,the prototype design of the composite fuze has been completed.In this paper,the trajectory of projectile in the muzzle-to-blasting is modeled,and the working process of the composite fuze is simulated by MATLAB.The explosion signal of the simulation output is consistent with that set by the algorithm.The domestic 69 tank as the experimental object,build a platform to carry out exploration experiments from various directions around the tank.The experimental results obtained by the principle prototype experiment are similar to the simulation results,and the feasibility of system design and theoretical research is verified by experiments.