Temperature rise test method of hot bridgewire EED under steady conditions

Sun²,

International Journal of Antennas and Propagation

et al. 2021

Self Cite

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.

Section: Theoretical Analysismentioning

confidence: 99%

Equivalent Test Method for Strong Electromagnetic Field Radiation Effect of EED

Sun²,

International Journal of Antennas and Propagation

et al. 2021

Self Cite

International Journal of Antennas and Propagation

“…With the rapid development of electronic technology, the combat system and electromagnetic weapons and equipment based on electromagnetic technology are accelerating the change of the combat system and attack and defense style of modern war, making the electromagnetic environment on the battlefeld increasingly harsh and thus leading to more severe electromagnetic environment threats faced by weapons and equipment in military operations [9][10][11][12][13][14][15]. EED, as a miniaturized electromagnetic sensitive element, is not only the "source" for weapon systems to complete the predetermined functions but also the "root" for these systems to have possible accidental ignition, explosion, and other accidents [16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Electromagnetic Effect Mechanism of EED under Continuous Wave Radiation

Wang,

Sun,

Zhou

et al. 2024

Self Cite

The electromagnetic radiation sensitivity of the electric explosive device (EED) and its installed use state is closely related to the size of the equipment and radiation field strength constraints. The use of the traditional all-level electromagnetic radiation method for the effect of the actual installed EED test in the electromagnetic environment simulation encountered a technical bottleneck. The microwave band is difficult to effectively assess through the current standing wave distribution and skin effect. The temperature rise of the EED bridge wire has no relationship with the frequency of the electromagnetic wave. In this paper, through the analysis of the electromagnetic effect mechanism of the EED, the coupled power model of electromagnetic irradiation of the EED is obtained, and the relationship between the temperature rise of the bridge wire of the EED and the electric field strength model is established. Under the action of high-frequency continuous waves, the electromagnetic effect of the device is tested to verify the correctness of the mechanism analysis of the electromagnetic effect of the device under the action of continuous waves. The results provide crucial technical support for the electromagnetic protection of the device under the harsh electromagnetic environment of the battlefield.

“…Kichouliya et al [16] instead used a white light interferometric fiber optic temperature measurement device, similarly the induced current of a hot bridge wire EED under continuous wave radiation condition was equivalently measured, however, this study was conducted on an exposed bridge, which has a different thermal state than the bridge wire with amorce, and the direct use of the exposed bridge temperature measurement result for safety assessment would introduce error. Lu et al [17] proposed a method for exposed bridge temperature measurement of hot bridge wire EED using GaAs fiber optic temperature measurement device to deal with the problem of large error in infrared fiber optic temperature measurement device, however, it also does not address the issue of the difference in temperature of the bridge wire between the exposed and the amorce-filled states.…”

Section: Introductionmentioning

confidence: 99%

Measurement, calibration, and verification on the critical ignition temperature of hot bridge wire electro-explosive device

Lyu,

Wei,

et al. 2023

Meas. Sci. Technol.

Self Cite

To address the problem of the difference in temperature between the exposed and amorce-filled state of the bridge wire in the fiber optic thermometry, this paper proceeds from a mathematical model of the temperature rise of the hot bridge wire electro-explosive device (EED), the relationship between the critical ignition temperature and the current of hot bridge wire EED is discussed. Combining thermal ignition theory, the technique of measurement and calibration the critical ignition temperature of hot bridge wire EED is proposed, and the technique is validated by injection versus radiation. The results show that the critical ignition temperature of the tested hot bridge wire EED obtained by testing and calibration is 337.53°C. The 50% ignition field strength of the hot bridge wire EED under radiation conditions obtained by the up-and-down method test is 1271 V/m, while the equivalent ignition field strength determined from the critical ignition temperature under the same radiation conditions is 1345 V/m, the error between the two is only 0.49 dB, which demonstrates the high accuracy of the proposed measurement and calibration technique.