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Abstract
The present study proposed the equivalent test method for the strong electromagnetic field radiation of electric explosive devices (EEDs) of the weapon equipment to satisfy the military requirements of the electromagnetic radiation safety test, as well as the evaluation of the electric ignition, the electric initiation ammunition, or missiles. Under stable conditions, the ignition excitation test and the bridge wire temperature increase test were performed to determine the ignition temperature of the EED. As radiated by the strong electromagnetic field, the relationship between the temperature increase of the bridge wire and the electric field intensity of the EED was developed based on the theoretical analysis and the experimental test. Given the ignition temperature of the EED, the radiation field intensity of the EED at 50% ignition was determined. As compared with the 50% ignition field intensity of the EED directly radiated by the strong electromagnetic field, an error less than 1 dB was caused. On that basis, the correctness of the equivalent test method was verified. Accordingly, this method was suggested to act as an effective method and technical means to test and evaluate the electromagnetic radiation safety of ammunition and missiles in unfavorable electromagnetic environments.
Highlights
Introduction eexplosive devices (EEDs) is recognized as the electric initiator or the components that exploit electric energy to detonate and ignite the explosives, the propellants, or the pyrotechnic materials within the device [1]
The bridge wire temperature of the mathematical model rise, and the current of the EED is established through the theoretical analysis, and the 50% ignition current of the EED is obtained through experiment to determine the ignition temperature of the EED
According to the ignition temperature of the EED obtained from the DC current injection test, the radiation field intensity of the equivalent test of 50% ignition of the EED is calculated to verify the accuracy and reliability of the ignition field strength obtained by the equivalent test method, and it is necessary to obtain the actual ignition field strength of the EED
Summary
The ignition system and the fuze should be capable of operating safely during and after the exposure to the mentioned environment. Under the same test conditions, the high field electromagnetic environment effect equivalent test was performed to determine the relationship between the irradiation field strength and the bridge wire temperature. The ignition temperature of wrapped explosive is not related to the frequency of the electromagnetic wave [39]; this study evaluated the ignition field strength of the EED by measuring the temperature rise of the bridge wire. The bridge wire temperature of the mathematical model rise, and the current of the EED is established through the theoretical analysis, and the 50% ignition current of the EED is obtained through experiment to determine the ignition temperature of the EED. Under the condition of electromagnetic pulse irradiation, the mathematical model of the bridge wire temperature rise and electric field intensity of EED is established. STEP II: The 50% ignition current of electric explosion device is obtained by experiment, and the ignition temperature of the device is determined
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