• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2005년도 추계 학술대회논문집(수송기계편)
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• pp.63-63
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• 2005

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2010년도 춘계학술대회 논문집
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• pp.479-480
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• 2010

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2011년도 춘계학술대회 논문집
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• pp.600-601
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• 2011

• 한국멀티미디어학회논문지
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• 제15권11호
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• pp.1284-1291
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• 2012

선박 객체 검출 기술은 입력된 비디오 및 영상 데이터에서 선박 객체가 존재하는 경우 선박의 위치를 검출하는 기술로서 입력 영상의 환경 변화와 잡음의 영향에 따라서 검출 정확도의 편차가 높다. 이런 문제점을 해결하기 위하여 본 논문에서는 배경 구축 기법과 형태학적 연산 기반의 다중 선박 객체 검출 기술을 제안한다. 제안하는 방법은 배경 제거 단계, 잡음 제거 단계, 객체 기준 위치 설정 단계, 객체 재구성 단계, 다중 객체 검출 단계 등 5단계를 거쳐서 선박을 검출한다. 다양한 변수를 고려한 15가지 실험 비디오를 대상으로 한 실험을 통해서 98.7%의 검출율을 나타내었으며, 환경 변화에 강인한 검출을 수행하는 것을 확인할 수 있었다. 제안하는 방법은 해상 관제와 선박 자동 운항 기술의 기반 기술로서 유용하게 사용될 수 있다.

• 해양환경안전학회:학술대회논문집
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• 해양환경안전학회 2006년도 추계학술발표회
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• pp.125-129
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• 2006

사람의 청각에 영향을 미치는 구역에 설치된 가전용품 및 기계에서 발생하는 소음을 저감하는 것은 중요하다. 특히 선박의 기관실에서 발생하는 소음은 저감이 불가능한 것으로 알려져 개선의 정도가 미미할 뿐 아니라 작업자의 청력손실이 발생하는 최악의 작업환경에 놓여져 있는 실정이다. 그러나 최근에 발전되고 있는 모니터링설비와 지능제어시스템을 이용하면 기관실의 주 엔진을 개방 해 둘 필요가 없어지게 되었다. 따라서 주 엔진의 주변을 흡음 및 차음벽으로 차단하여 기관실의 소음을 개선할 수 있는 계기가 되고 있다. 본 연구에서는 소음을 흡수할 수 있는 차음벽의 성능을 높이기 위해 헬름홀츠 공영기의 원리를 적용한 흡음벽에 대하여 연구하였다.

• 월간산업보건
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• 통권5호
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• pp.4-15
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• 1988

In order to proffer the fundamental data for the better working environment and the effective establishment of hearing conservation program on workers exposed to industrial noise, author assessed noise levels on the 42 noisy processes among 84 manufactures of 9 industries and measured noise gearing loss by the type of industries on 3,104 workers at these noisy processes from March, 1986 to Februry, 1987. The results were summarized as follows: 1. The averge of A-weight sound level of 23 processes(54.8%) and the avergae of sound level at each octave band of 14 processes(33.3%) exceeded the permissible exposure limits in 8 hours per day. 2. The noise level was the highest in process of cocking of ship building(109.1dBA), and followed by plating of steel rolling(104.3dBA), rivet of manufacture of motor vehicles(102.5dBA), shot of ship building(98.5dBA), aciding(95.7BA) and steel tubing(95.0dBA) of steel rolling, weaving of textiles(95.0dBA). 3. The permissible exposure time for the average of sound level at each octave band was only 30 minutes in the process of cocking of ship building, plating of steel rolling and rivet of manufacture of motor vehicles. 4. As a result of audiometric examination in 3,104 workers, the rate of hearing loss over 50dB at 4,000Hz was 7.3%(227 workers) and the rate of hearing loss over 41dB at 60average method was 2.9%(89 workers). 5. The prevalence of occupational hearing loss in ship building and manufacture of motor vehicle was 5.2% and it was the highest among prevalence of these 9 industries. 6. As a result of this suvery, the noise control and gearing conservation program were required especially in the industry of ship building and manufacture of motor vehicle.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2004년도 춘계학술대회 논문집
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• pp.783-788
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• 2004

Recently, Statistical Energy Analysis(SEA) is being increasingly applied to describe vibro-acoustic behavior of complex structures, such as air plane, automobile, ship, building. In this paper, we discuss the application of SEA to predict the interior noise for KTX train. To validate the SEA model of KTX train, calculated the interior noise for motorized car is compared to measured one. Finally, the reduction measures of interior noise for KTX are also discussed.

• 한국소음진동공학회논문집
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• 제18권11호
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• pp.1177-1184
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• 2008

URN(underwater radiated noise) is one of the important performances of the battle ship related to the stealth. The main source of the URN is the structure-borne noise on the hull. And the pipe vibration transmitted to the hull is the main source of the structure-borne noise when the speed of the ship is lower than CIS(cavitation inception speed). In this paper, the vibration isolator(rubber mount) for the pipe system is described in order to reduce the structure-borne noise transmitted to the hull. The vibrations on the sea-water conveying pipes and their supports are measured in order to know how much vibration occurs on those positions. Based on these test results, the improved design of the rubber mount is suggested by the parametric study and is verified numerically with the pipe and hull model.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2009년도 추계학술대회 논문집
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• pp.560-564
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• 2009

This paper introduces measurement and evaluation of vibration of the ship propulsion machinery (ISO 20283-4). ISO 20283-2 for measurement of structural vibration on ships was finalized last year and ISO 20283-4 was drafted and reviewed by particulate ISO members now. As the importance and core field in ISO 20283-4, the torsional vibration of propulsion system for sea going vessels should be analysed in design stage and it should be confirmed by the its measurement during the sea trial. Criteria for evaluation of torsional loadings are defined by IACS (International Association of Classification Societies) UR M68. In this paper, the author introduced the important and controversial matters during the review of ISO 20283-4.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2014년도 춘계학술대회 논문집
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• pp.530-533
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• 2014

ISO6954:2000 (Mechanical vibration - Guidelines for the measurement, reporting and evaluation of vibration with regard to habitability on passenger and merchant ships) has taken effect as the governing body for vibration regarding habitability due to ship vibration. However, ISO6954:2000, when compared ISO6954:1984 (the first draft of ISO6954), needs to clear some deficiencies concerning convenience and reliability during field applications. In this paper, ISO6954: 1984 and 2000 are proposed on their revisions in the future.