Magnetic-Shielding Effectiveness Analysis of the Trigger Assembly of Small Arms

Lee, Kisu; Ahn, Joon Mo; Chae, Je-Wook

doi:2018.21.4.456

J. KIMS Technol > Volume 21(4); 2018 > Article

Research Paper

Journal of the Korea Institute of Military Science and Technology 2018;21(4):456-463.
DOI: https://doi.org/10.9766/KIMST.2018.21.4.456

Magnetic-Shielding Effectiveness Analysis of the Trigger Assembly of Small Arms

Kisu Lee, Joon Mo Ahn, Je-Wook Chae

¹The 4th Research and Development Institute, Agency for Defense Development
²The 5th Research and Development Institute, Agency for Defense Development

소구경 개인화기 격발신호 발생장치의 자기차폐효과 분석

이기수, 안준모, 채제욱

¹국방과학연구소 제4기술연구본부
²국방과학연구소 제5기술연구본부

Abstract

With the development of weapon systems by mounting various sensors, it makes important to analyze the precise functioning of sensor to external environment. In the case of small arms with magnetic sensor, the malfunction of small arms might be caused by strong external magnetic fields. In this study, the effects of magnetic sensor on external magnetic fields were analyzed, and optimal magnetic shield and shield structure were designed through M&S. In addition, the magnetic-shielding effectiveness of magnetic sensor in small arms was verified with commercial shielding materials. As a result, it was demonstrated that the Fe-Cu-Si-Nd-B with the structure of multi-layer metallic shields was shown the magnetic-shielding effectiveness of 83 % for an external permanent magnet and 19 % for an alternating magnetic field of 180 dBpT at 60 Hz, respectively.

Key Words: Small Arms, Magnetic Sensor, Magnetic-Shielding Effectiveness, Multilayer Metallic Shields