Lumped Parameter Analysis of Bridge Wire in an Electro Explosive Device of a Power Cartridge for Water-Jet Application: A Case Study

Parate, Bhupesh Ambadas; Chandel, Sunil; Shekhar, Himanshu

doi:10.22211/cejem/127814

Cited by 4 publications

(2 citation statements)

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“…Therefore, a reliable assessment of its electromagnetic radiation safety must be obtained before use. The current safety assessment methods for hot bridge wire EED are mainly the induction test method [8,9] and the fiber optic thermometry [10,11]. Due to the induction test method, which is inevitably affected by standing wave effect [12], causing a low suitable frequency range (not exceed 1 GHz), it does not meet the technical requirements for the evaluation of safety test of hot bridge wire EED under strong field electromagnetic radiation.…”

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.

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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.

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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.

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“…To be specific, such a device consists of EED, conductive explosive synthetic detonator, semiconductor bridge electric exploding device, laser exploding device, etc. [2][3][4][5]. e EED has been commonly employed to ignite gunpowder and detonate explosives, and it can also act as a small driving device for rapid valve opening, arming, and rocket separation [6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Equivalent Test Method for Strong Electromagnetic Field Radiation Effect of EED

Wang

Sun²,

Wang

et al. 2021

International Journal of Antennas and Propagation

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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.

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Simulation on correlation of pulse ignition sensitivity for hot bridge wire EED

Lyu

Wei

Song

et al. 2023

Journal of Applied Physics

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To solve the problem of testing the sensitivity under electromagnetic pulse radiation for a hot bridge wire electro-explosive device (EED), this paper simulated and analyzed the correlation between the critical ignition current under steady and pulse excitation. The simulation results showed that, under single pulse excitation, the critical ignition current of the EED decreases with the increase in the pulse width, and the variation law can be divided into three pieces: adiabatic, transition, and constant; while under pulse train excitation, due to the thermal cumulative effect, the critical ignition current is related to both material properties and excitation parameters. By analyzing the simulation results and considering the thermal ignition theory, the mathematical model of the critical ignition current under pulse excitation was established, and the mathematical model showed that under pulse train excitation, the critical ignition current is relevant not only to the single pulse excitation critical ignition current, pulse period, and duty cycle, but also to the ratio of single pulse and steady excitation critical ignition current and the thermal time constant. It was verified that the errors between the theoretical values obtained from the mathematical model and the results obtained from the simulation were within 2.5%.

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Lumped Parameter Analysis of Bridge Wire in an Electro Explosive Device of a Power Cartridge for Water-Jet Application: A Case Study

Cited by 4 publications

References 0 publications

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

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

Equivalent Test Method for Strong Electromagnetic Field Radiation Effect of EED

Simulation on correlation of pulse ignition sensitivity for hot bridge wire EED

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