• 한국군사과학기술학회지
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• 제12권2호
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• pp.146-151
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• 2009

It is known that muzzle flash can be generated by the reaction between the oxygen in the air and unburned gunpowder contained in the propellant gas if a barrel is not long enough to burn gunpowder fully inside of the barrel. A hugh muzzle flash, which is a characteristic of small arms with short barrel length, disturbs a shooter in aiming at the target at night by making the shooter blind for a while and endangers the shooter's life by revealing firing position to enemies. In addition, the heat of muzzle flash can deteriorate the performance of thermal sights, which are attached to small arms for effective night combat. In this paper, flash suppressors of different shapes were designed for a newly developed 5.56mm caliber rifle with short barrel length and the performance of each flash suppressor to reduce the muzzle flash was compared by on-site test firing. Through the test firing, a highly efficient design of flash suppressor for reducing the muzzle flash was identified. The result of the paper can be referred when designing flash suppressors for small arms with short barrel length.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 1996년도 추계학술대회 논문집
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• pp.1039-1043
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• 1996

In the firing operation, muzzle jumping phenomenon was investigated, and a method of reducing muzzle jump was suggested. The muzzle jumping force was determined from the torque acting on the rifle due to a recoil force. For the purpose of reducing a muzzle jump, the gas flowing through the M16A1 flash suppressor was considered. A flash suppressor, improved in reducing a muzzle imp, was modeled and tested. The experiment shows that muzzle jump has quantitative relation to shape of a flash suppressor, and can be reduced by the improved modeling of a flash suppressor.

• 한국군사과학기술학회지
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• 제14권6호
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• pp.979-985
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• 2011

This paper includes that there are results of designing the flash hider and analyzing fluid dynamics of a front area of the barrel to shorten the length of small arms. Generally, the muzzle flash can be generated out of the barrel by the reaction between the oxygen in the air and unburned gunpowder contained in the propellant gas if a barrel is not long enough to burn gunpowder fully inside of the barrel. Though, the hugh muzzle flash, which is a characteristic of small arms with short barrel length, caused a soldier to aim at the target at night by making the soldier blind for a while and endangers his life by revealing firing position to enemies. Besides, the heat of muzzle flash can weaken the performance of thermal sights, which are attached to small arms for night battlefield. In this paper, flash hiders with several different shapes were designed for a newly developed 5.56mm caliber rifle with short barrel length. The performance of each flash hider to reduce the muzzle flash was compared theoretically and experimentally. Through the authorized test procedure, a highly efficient design of flash hider for reducing the muzzle flash was identified. The result of the paper can be helpful when designing flash hiders for small arms with short barrel length.

• 전자공학회논문지CI
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• 제48권5호
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• pp.16-23
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• 2011

Gunnery로부터 발생하는 muzzle firing은 매우 높은 에너지를 방출하는 표적으로 볼 수 있다. 따라서, xx km 이상의 원거리 gunnery의 경우 일반 CCD 영상으로는 식별하기 어렵지만, IR(infrared) 영상에서는 충분히 식별될 수 있다. 본 논문에서는 원거리 IR 영상으로부터 muzzle firing으로 발생되는 profile을 획득하여 분류하는 기법을 제안한다. IR 센서(infrared sensor)의 특성, 거리, 대기 상태 등에 따라 muzzle firing으로 발생하는 에너지는 서로 다른 양으로써 IR영상에 표현된다. 따라서, 단순히 IR 영상의 픽셀값으로 gunnery 종류를 분류하는데는 명확한 한계가 있다. 제안하는 기법에서는 xxx Hz 이상의 고속 장비를 이용하여 muzzle firing이 이루어지는 구간내에서 시간에 따른 픽셀값의 profile을 획득하여 형태기반의 특징을 추출한 후, 피셔 공간(Fisher's space)로 투영시켜 GMM(Gaussian Mixture Model)을 이용하여 gunnery의 종류를 분류한다. 제안하는 기법을 이용하여 지상 및 공중에서 획득한 gunnery에 대하여 분류 실험을 수행한 결과 파라미터에 따라 최대 93%의 분류율을 확인하였다.

• 한국군사과학기술학회지
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• 제14권4호
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• pp.700-709
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• 2011

In this paper, we propose a novel method which can detect ordnance firing events in IR images. The proposed algorithm is comprised of effective target detection and robust clutter rejection methods based on the temporalspatial cooperative filter. And additional clutter reduction is performed based on the proposed two features, NTFF (Number of Temporal Filter Frames) and SNS(Size-Normalized Signal). Experimental results show the effectiveness and feasibilities of our proposed algorithm.

• 한국컴퓨터정보학회논문지
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• 제19권10호
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• pp.43-53
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• 2014

Gunnery 표적으로부터 발생하는 영상특징은 장비의 위치를 탐지하고 종류를 판별하는 주요 정보로 활용될 수 있다. 본 논문에서는 Gunnery 영상에서 표적 영역의 밝기값을 획득하여 특징을 추출하고 분류하는 기법을 제안한다. 제안하는 기법에서는 38~40개의 신호 기반 특징과 2개의 모델 기반 특징을 추출하여 분석하고 분류모델에 적용한다. 다중 클래스 분류를 위하여 트리(tree) 기반의 분류 모델을 설계하였으며, 시스템에서 요구하는 Gunnery의 종류와 특성에 따라 유사도를 정의하여 트리 구조를 설계하였다. 트리 구성 단계에서는 각 레벨마다 SVM(Support Vector Machine)을 이용하여 분류 하였으며 시스템에서 요구하는 분류 성능을 만족함을 확인하였다.