• 제목/요약/키워드: Fishing operation process

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사이클론 기법 기반 생산자동화의 설비투자 의사결정 Framework에 관한 연구 (A Study on the Framework of Decision Making on the Facility Investment of Production Automation Using CYCLONE Techniques)

  • 정현기;이동수;배정훈;신성철;김수영;이재철;정보용
    • 대한조선학회논문집
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    • 제53권5호
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    • pp.420-427
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    • 2016
  • The marine equipment companies expanding facility investment in accordance with the booming economy are suffering from the reduced demand and the growth of chinese businesses. In this regard, the risk of overinvestment and the importance of prudent equipment investment must be reconsidered. Thus, in this study we performed a productivity and economical efficiency analysis in order to evaluate the investment value on production facilities in a company under the present conditions. The freezer of a fishing vessel manufactured by N company is selected as the subject of our study, while the assembly and welding cooling plates are configured as the scope of automation. Analysis on productivity and economical efficiency was conducted through CYCLONE (Cyclic Operation Network) simulation and economic analysis methods after analyzing the production process of freezer. The proposed analytical technique can be used to support the investment decision in production automation equipment of fishing vessels freezer.

공모선(工母船) 개척호(開拓號)의 운용(運用)에 관한 실태(實態) 분석(分析) (The Actual Conditions of the Management of the Factory Ship GAECHEOG)

  • 정동희;김진건
    • 수산해양교육연구
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    • 제9권2호
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    • pp.149-166
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    • 1997
  • This thesis is studied by means of operation diary of the factory ship GAECHEOG in the Sea of Okhotsk and the Sea of Bering from Jul. 1993 to Dec. 1996, We summarize these results as follows : 1. The factory ship GAECHEOG equipped trawl winch able to haul raw fish 700M/T per day and cargo winch able to unload manufactured goods 900M/T. The crews consist of 290~330 persons. 2. Factory machineries equipped surimi making plant able to process about 150M/T per day and fish meal plant able to manufacture about 70M/T per day. 3. The fishing ground from June to Nov. was the western Bering sea lying in the eastern Kamchaka peninsula and from Dec. to May, the fishing period to gather roe of a Pollack, was the Sea of Ohotsk lying in the western Kamchaka peninsula. 4. The buying catch of fish per each voyage from Dec. to May, the fishing period gathering Pollack-roe, was about 17,000~33,000M/T and from Jul. to Oct., the fishing period gathering non Pollack-roe, was about 10,000~21,000 M/T. 5. Raw fish was the most about 33,000M/T of the 2nd voyage in 1994 and was the least about 8,300M/T of the 1st voyage in 1993. Other voyages were about 13,000~18,000M/T. 6. The Pollack buying from Jul. to Nov. in the Bering sea was 5~7 fishes for one row in pan and body length about 40~50cm, and from Dec. to May in the Sea of Ohotsk was 6~8 fishes for one row in pan and body length about 37~45cm. 7. Surimi production in the 2nd voyage in 1994 was the most about 7,300 M/T, in the 1st voyage in 1993 was the least 1,900M/T and in other voyages was about 2,500~3,800M/T. The extraction rate of surimi goods for raw fish was about 17.4~26.5%. 8. Fish meal production in the 2nd voyage in 1994 was the most about 2,300 M/T, in the 1st voyage in 1993 was the least about 780M/T and in other voyages was about 1,100~1,700M/T. The extraction rate of fish meal goods for raw fish was about 7.3~10.7%. 9. Pollack-roe production was very much from Jan. to Apr. and was about 380~700M/T per each voyage. The extraction rate of Pollack-roe for raw fish was about 1.2~4.9%.

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열연공장의 압연공정 두께계 폭계 온도계를 이용한 품질모니터링 시스템 개발 (Development of quality monitoring system using thickness gauge, width gauge, themometer for a rolling operation in hot rolling mill plant)

  • 주종율;오재철
    • 한국전자통신학회논문지
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    • 제11권4호
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    • pp.387-394
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    • 2016
  • 현재 운영되고 있는 제철소의 열연 공장은 24시간 상시 운전을 하고 있다. 각 공정별 주요 기능을 살펴보면 가열로, 조압연, 사상압연 및 권취 등으로 구성되어있으며, 여기에서 두께 및 폭 압연을 하고 이를 위한 소재의 온도를 조절하는데 큰 기능이 있다. 여기에는 작업의 특성상 고장 및 불량 요소가 상당히 많다. 또한 제품의 출하 이후에도 클레임이 발생하면 조사가 필요한 실정이다. 기존의 각 공정별 두께계, 폭계, 온도계에서의 독립적인 데이터 취득 및 모니터링에 의한 운전은 조업자로 하여금 많은 피로감을 준다. 이를 보완하고자 각 공정의 데이터를 통합해서 기능별로 모니터링하고 향후 작업 결과도 확인할 수 있는 통합 모니터링 시스템의 필요성이 대두되었다. 이에 압연공정 품질모니터링 시스템을 개발함으로서 보다 효율적인 운영이 가능하게 될 것으로 기대한다.

STS304합금의 선삭가공에서 표면거칠기의 최적화 (Optimization of Surface Roughness of STS 304 in a Turning Process)

  • 최만성
    • 반도체디스플레이기술학회지
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    • 제16권1호
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    • pp.59-64
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    • 2017
  • The general manufacturing problem can be described as the achievement of a predefined product quality with given equipment, cost and time constraints. Unfortunately, for some quality characteristics of a product such as surface roughness it is hard to ensure that these requirements will be met. Stainless steels STS 304 is frequently used as shaft materials in small fiber reinforced polymer(FRP) fishing boats. In this work, the dry turning parameters of STS 304 are optimized by using Taguchi method. The experiments were conducted at three different cutting speeds with three different feed and three different depth of cut. The cutting parameters are optimized using signal to noise ratio and the analysis of variance. The effects of cutting speed and feed on surface roughness was analyzed. The results revealed that the spindle speed is the more significant parameter influencing the surface roughness.

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어촌지도사업의 평가 (An Evaluation on the Operating of Fisheries Extension Services)

  • 최정윤
    • 수산경영론집
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    • 제17권2호
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    • pp.65-106
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    • 1986
  • 1, The Purpose of Study This is a study on the Evaluation of the operating of Fisheries Extension Services of Korea, for performing the activities such as guiding fisheries technique as well as offering industrial information to the fishermen in fishing village. By doing so, the Fisheries Extension Sevices(FES) can materialize the continued growth of fisheries, the social and economic development of fishing village, and the increase in income by enhancing the knowledge level of Fishermen, etc. In performing fisheries policy, this activity plays a great role on the research and development activity, and it has become practical since 1976 in Korea. In order to meet immediately with the problem of fisheries technical innovation and rapid environmental changes surrounding the fisheries, the fishermen should not only enhance their scientific and comprehensive capacity in fisheries technique but abtain various effective information. Generally, as most of all the fishemen are poor in the managerial structure and scattered in fishing villages, they have little opportunity in the contact of information. As a result, it is nessessary for the FES to perform the fishing business by the extension service officials who has received special training and acquired fisheries know-how in these fields. And yet, FES is under the unfullfilled circumstance in such factors as manpower, technical know-how, equipment, and the service system etc., which is required in promoting the social, economic development of fishing village and in resolving the high technique demand of fisherman. This study on the fisheries extension services have been studied from those backgrounds. 2. Research Method The data of collecting methods which were necessary in carrying out this study was adopted by the questionaire research on the present extension service activity, through the subject of the extension services (driving agency of the work and the officials), the object(fishemen) and the 3rd observers to the extension services (the authorities concerned). The research sample was taken by the sampling extraction of total 1, 774 men from the above 3 groups. And the research was carried out from August, 1986 to October, 1986, supported from the Fisheries Extension Office (FEO) located in field during the research process. In this study, the levels of the extension operating were determined and estimated in accordance with the extension service method, morale of extension service officials and the extension service system, etc. through the collected data of the research questionaire paper. And based on this result, the essential conditions of the extension services were grasped, and also we tried to present the various activity plan necessary to promote the operating of the extension services. The questionaire research data was calculated by the computer center of National Fisheries University of Pusan, and the total result was again tried on the one demension analysis along with two dimension analysis to search out the relativity between the questionaire, and the statistical test was done $\chi$$^2$test in significance level of l~5%. 3. Contents of Study This study consists of 7 chapters and the contents are as follows : Chapter I : The object and method of the study Chapter II : The assessment and analysis of the extension services Chapter III : The contents and method of the extension services Chapter IV : Analysis of the essential conditions for the extension services Chapter V : The evaluation of activities of extension services Chapter Ⅵ : Conclusion.4. Results and RecommendationTherefore, the results of this study estimated by logical process and analysis are as follows : 1) Most of Korean fishing villages and coastal fishermen have shown much concerns about fisheries technique and social changes, thus many of them were confronted with new problems on how to adapt and to meet changes. 2) Majority of fishermen estimated FEO as an organization of specific technologies with all the thing concerning the fisheries technique in general. Therefore the fishermen wanted to utilize the FEO as an adaptable method for the modern fisheries techniques as well as the environmental changes. 3) In contrast with the fast changes of the fisheries technique, the complexity and variety of technical system and the broadness of fishing village and fishermen, it was revealed that the necessary factors such as the facilities, manpower, budget, and the level of applying techniques of the FEO located in field were highly insufficient. Accordingly, the guiding efficiency was low and the extension services did not provide full solution to the various request from fishermen. 4) It is possible to classify the activation factor for the extension service into two large dimension ; personal dimension relevant to guidance officials and work dimension relevant to the organization. And it was found that the activation level of the work dimension was far lower than the personal dimension between them. So, the activation should be done first in the dimesion to promote the activation of the extension services. 5) The extension services officials are now demoralized in general, thus it is necessary to take reality into consideration : the expense of activity, the adequate endowment of activity scope and the reasonable operation of the position class, etc to enhance its morale. However, in order to do the FES activation, first of all, the systems should be established which is lain unsettled stage until now. And there must be change in the understanding of government i.e. the fisheries extension services are the essential policy subject to build up the base of fisheries growth and modernize the fisheries management. And it should be driven positively with the recognition of the "lasting project".g project".uot;.

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제501 오룡호 침몰사고 원인분석을 위한 침수·침몰 시뮬레이션 연구 (A Study on Flooding·Sinking Simulation for Cause Analysis of No. 501 Oryong Sinking Accident)

  • 이재석;정현섭;오재호;이상갑
    • 한국항해항만학회지
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    • 제41권6호
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    • pp.451-466
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    • 2017
  • 원양어선 제501 오룡호는 황천 중인 베링해에서 조업 후 피항하던 중 개구부를 통한 침수로 인하여 침몰하였으며 많은 선원들이 사망하고 실종되었다. 본 연구에서는 유체-구조 연성(Fluid-Structure Interaction, FSI) 해석기법의 고도 정밀 M&S(highly advanced Modeling & Simulation) 시스템을 사용하여 실선 침수 침몰 시뮬레이션을 수행하여 침몰사고의 과정을 정확하고 과학적으로 분석하고자 하였다. 베링해 침몰사고 시의 기상 및 해상상태를 객관적으로 확보하기 위하여 침몰사고 지역의 시간대별 기상 및 해상 시뮬레이션을 수행하여 침몰사고 당시 파랑과 강풍 등을 분석하고, 불규칙 파랑과 강풍 스펙트럼을 사용하여 구현하였다. 사고선박의 선체 도면 등을 통하여 선박의 선형, 배치 및 중량 분포와 외부 해수 침수 개구부 및 선내 침수 경로를 분석하고 주요 탱크들의 용적과 그들의 중량 분포를 추정하여 침수 침몰 시뮬레이션을 위한 시나리오를 작성하고, 사고선박의 전선과 유체(공기 및 해수)를 상세 모델링을 하였다. 본 연구를 통하여 침수 침몰사고는 단순한 복원성의 부족으로 인한 일반적인 전복 침몰사고와는 다소 차이가 있다는 것도 확인할 수 있었다.

위성영상 기반 해양수산 양식장의 경계 데이터 추출 (A Study on Extracting Boundary Data of Marine Fish Farms Based on Satellite Images)

  • 정성훈
    • 한국항행학회논문지
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    • 제27권6호
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    • pp.877-883
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    • 2023
  • 선박의 안전 운항과 해양수산 양식장 관리를 위해 해양수산 빅데이터 구축에 필요한 해양수산 양식장의 경계를 추출한 데이터 셋은 어장 허가 구역과의 일치 여부 조사를 통해 선박의 운항 경로에 불법 설치 시 장애물 정보를 미리 제공할 수 있다. 또한, 해양 사고 등에 의한 피해보상을 위해 필요한 양식장 조업 여부도 파악할 수 있으며, 해당 지자체에서는 어장도와의 중첩 비교를 통해 어장 관리 등에 사용할 수 있다. 선박의 안전 운항을 위한 전자해도에 물표 표시를 통해 운항 경로상의 장애물 파악에 필요한 기초 데이터로써 활용이 높다. 이 연구에서는 양식장의 경계 추출을 위해 충분한 공간해상도를 가지며 짧은 주기로 반복하여 촬영하는 유럽항공우주국 (ESA; europe space agency)의 Sentinel-2 위성영상 자료를 사용하였다. 영상 이미지에서 양식장의 주기별 현황 데이터의 생산을 위해 해상의 구역별 데이터를 부산권, 울산권, 거제·창원권, 고성·통영권, 남해·사천권의 5개 관리 구역으로 나누어 처리하였으며, 구역별 위성영상의 수집과 영상의 강조 처리 과정을 거쳐 양식장의 경계 데이터와 메타정보를 추출하였다.

우리나라 다랑어선망어선의 어선원 안전 위험요소 분석 (Analysis of safety risk factors of fishermen on the Korean tuna purse seiner)

  • 김오태;조현수;장호영;이유원
    • 수산해양기술연구
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    • 제58권3호
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    • pp.251-261
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    • 2022
  • Tuna purse seine fishery (TPF) constitute more than 60% of distant water fishery production in Korea based on a statistic of 2018, and 28 ships from four different companies were under operation at the western and central Pacific Ocean. On this research, common risk factors during TPF were investigated via enumeration of five years Korean fisherman's insurance payment statement, followed by some counterplans to diminish the accident rate. The accident rate of TPF on the Pacific Ocean peaked by 43.0% in 2014 and constantly decreased to 23.0% until 2018, presenting an average of 33.6%. Meanwhile, the accident rate on the Indian Ocean reached the highest point 55.1% in 2014 and declined to 11.6% in 2016, having an average of 24.7%. The average accident rate of the Indian Ocean scored 8.9% lower than the rate of the Pacific Ocean, but no statistic significance was observed. Depending on the process of operation, 'casting or hauling of net' was the most frequent part that people received an injury (40.4%). When the accidents were classified by their types, 'falling down' was the most recurrent cause of the injuries (28.5%). At the point of severity, the worst injuries were induced by crush hazard. Considering aforementioned accident frequency and severity, all the factors on the accident type list were divided into three different groups including high risk, moderate risk, and common risk. This study is expected to contribute to the reduction of occupational accidents during the work of fishermen and establishment of a safety management system for distance water fishing vessels.

선망어법의 어획과정에 있어서 죔줄의 장력-I -망형별 죔줄의 장력에 관한 모형실험- (A Study on the Tension of a Purseline in the Process of Catch of the Purse Seine Fishing Methods-I -Model Experiment on the Tension of a Purseline by Net Shapes-)

  • 박정식
    • 수산해양기술연구
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    • 제35권1호
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    • pp.1-10
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    • 1999
  • The north-west sea area of Cheju Island is where originate two layer current in the summer season. The case of the fishing operations in this sea area is almost impossible for normal expansion of the net gear for shooting net, and is happened to be frequent occasions for rise of tension suddenly in purseline by changes of the net shapes in the operation. Therefore, the safety of the operations is often obstructed by the above mentioned. In connection with the above, model experiments on the purse seine in the circulating water tank was carried out in comparison and analysis on the changes of tension in the pruseline by deformation of purse seine in the sea area of two layer current. THe results obtained are as follows;In the case of the required time for pursing of 20 minutes in the no current set, the increasing curve for tension of purseline can be expressed as:Y=0.0004x3+0.0098x2+0.3000x(r=0.9989)where Y is tension(metric tons) of a purseline, x is required time(minutes) for pursing. And, the maximum value of tension in this time was an increase of 31.3 percent at 15 minutes, and was a decrease of 30.3 percent at 30 minutes than that of 20 minutes.When the bottom margin of net is held on the position in velocity of 0.5 knot at three-eighths of net in the bottom current to the net height, the maximum tension of the required time for pursing of 30 minutes in tight set and loose set were decrease of 29.5 percent and 28.7 percent respectively than that of 20 minutes.The work load during the required time for pursing of 20 minutes were calculated 5.79×106 kgf·m in no current set, 7.89×106 kgf·m in tight set and 5.15×106 kgf·m in loose set, therefore it was an increase of 22.3 percent in tight set, and was a decrease of 11.1 percent in loose set than that of the no current set. Where tight set and loose set is a range of the bottom current with velocity of 0.5 knot at three-eighths of net to the net height.

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우리나라 근해 대형트롤 어선의 선교업무 특성 (Characteristics of bridge task in Korean coastal large trawler)

  • 김민선;신현옥;이주희;황보규
    • 수산해양기술연구
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    • 제49권3호
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    • pp.301-310
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    • 2013
  • To suggest a standard concerning with the arrangement of bridge equipment, the authors conducted the video observations with 3CCD (charge coupled device) cameras installed on the ceil of the bridge for monitoring the working activities of two bridge teams (the skipper/mate1 and the skipper/mate2) in a Korean coastal large trawler(gross tonnage: 139) for five days from July 30th. 2010 and analyzed of the data. Work elements coded by the work activities were input on the sheet of work analysis by the time unit of 1 sec according to the time occurred. A single work element among the work activities for every 5 minutes was denoted as the number of occurrence. The frequency of equipment usage was limited only in the usage of the equipment. In the case of the navigation and the towing net two ranks were integrated and analyzed. On the other hand, in the case of the casting net and the hauling net, two processes were integrated to as one and then analyzed separately as two ranks. As the results, 15 elements of work was carried out between two bridge teams for the observation; lookout, radar, GPS plotter, fish finder, net monitor, fishing deck, RPM indicator, rudder angle indicator, compass card, for maneuver; steering, ship speed control, trawl winch operation and external communications, paper works and others. It was found that the work load of the skipper per 5 minutes accordance with the navigation, the casting net, the towing net and the hauling net are 20.5 times, 11.9 times, 38.0 times and 9.5 times respectively, the mates are 65.2 times, 66.5 times, 85.7 times and 59.1 times respectively. The radar was shown the highest frequency of the equipment usage and the next was the fish finder, the GPS plotter and the external communications in the case of the navigation. In the case of the towing net the frequency of usage was high the ranking as the radar, the net monitor, the fish finder, the GPS plotter, the steering system and the external communications. In the case of the integrated process both of the casting and hauling net the trawl winch was shown the highest frequency to the skipper and the next was the GPS plotter and the radar, and the steering system was shown the highest frequency to the mate and the next was the radar, the ship speed control system, the GPS plotter, the net monitor and the fish finder.