Research On The Parameter Test System Of Warhead Simulation Martyrdom Based On Storage

Warhead’s sympathetic detonation can cause huge loss during the process of storage and transportation.Accurate measurement of sympathetic detonation characteristic parameters can provide basis for the design of warhead structure and explosive charge,which is of great importance for safety protection.The current test systems for sympathetic detonation characteristic parameters is still rare and exist the problems of inconvenient system layout and single test parameter.Based on such situation,researches on the simulation measurement method based on storage test for warheads detonation characteristics have been carried out.In this thesis,the factors that cause the warhead to detonate are firstly analyzed,and three test parameters of shock wave pressure,vibration acceleration and strain are determined.According to the principle of the sympathetic detonation experiment,the storage test scheme of the simulation sample is constructed,which provides a new test idea for obtaining the characteristic parameters.Based on the simulation analysis of a typical warhead’s detonation process,the amplitude and frequency characteristic of the signals to be measured is obtained.On this basis,the system technical index and overall design scheme are proposed.According to the signals characteristics,the hardware circuits are designed,including signal conditioning circuit,signal acquisition,signal storage and communication circuit,FPGA control circuit and power supply circuit.Based on the hardware platform,Verilog HDL is adopted to programme various control modules,realizing the functions of data acquisition,storage and communication.And the Flash storage area is divided into a negative deferred storage area and a continuous sampling storage area to ensure that the effective signal could be completely acquired.PC software is designed based on Lab Windows/CVI to realize the functions of data preservation and waveform display.Finally,the functions of the system’s main modules are tested by applying sinusoidal signal and shock excitation,and testing results show that this system can complete data acquisition and storage for three-channel pressure,three-channel vibration acceleration and six-channel strain signals,sampling rate up to 500 k Hz.The storage test system designed in this paper can realize multi-channel parallel acquisition of shock wave pressure,vibration acceleration and strain signals.The device has the advantages of small volume and shock resistance,providing an effective testing method for evaluating the sympathetic detonation characteristics of warheads.