• 수산해양기술연구
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• 제35권1호
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• pp.35-40
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• 1999

We selected horse mackerel Trachurus japonicus, mackerel Scomber japonicus and arrow squid Todarodes pacificus, to use in the experiment. These fishes migrate to the Cheju coast and were caught by set-net. We studied the leading effect on the fish schools using the attracting lamps in an outdoor water tank at the Marine Research Institute in Cheju National University. The results obtained are summarized as follows; 1. The attracting rate of fish schools was increasing as the time between switching on and off each lamp was getting longer when each of the attracting lamps was switched on and off in order. However, the attracting rate of mackerel school showed a tendency to be higher than that of the other two species. 2. The attracting rate of fish schools was increasing as the time of switching off the lamps was getting longer when the attracting lamps which had been switched on were switched off in order. However, the attracting rate of mackerel school showed a tendency to be higher than that of the other two species. 3. The attracting rate of fish schools was decreasing as the speed of moving the attracting lamp was getting faster when the attracting lamp was moving. However, the attracting rate of mackerel school showed a tendency be higher than that of the other two species. 4. To determine the distance between the attracting lamps, there would be two methods. One is switching on and off the attracting lamps in order, and the other is switching off the attracting lamps in order which had been switched on. The methods showed that the attracting rate of fish schools were decreasing as the distance between the attracting lamps were getting longer. However, the attracting rate of mackerel school showed a tendency to be higher than that of the other two species.

• 수산해양기술연구
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• 제35권3호
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• pp.277-283
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• 1999

For the purpose of leading horse mackerel Trachurus japonicus schools, mackerel Scomber japonicus schools and arrow squid Todarodes pacificus schools, which migrate to the Cheju coast and are caught by the set-net, to the set-net by attracting lamps, we made five attracting lamps and took a practical experiment in the Gwiduk and Dongbuk set-net fishing ground. In the set-net with two bag-nets, we compared the amount of catch of both bag-nets by the means of switching on and off the each attracting lamps in order, switching off the attracting lamps in order which had been switched on and moving an attracting lamp.In the bag-net with an attracting lamp, horse mackerel, mackerel and arrow squid were caught the most, on the other hand, yellow tail Seriola quinqueradiata, striped mullet Mugil cephalus were caught in large quantities in the bag-net without attracting lamp. File fish Stephanolepis cirrhifer, Dusky spinefoot Siganus fuscescens were caught evenly in both bag-nets regardless of an attracting lamp.This result indicates that the amount of horse mackerel, mackerel, arrow squid can be increased by the use of attracting lamps in the set-net fishing method.

• 수산해양기술연구
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• 제51권2호
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• pp.163-170
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• 2015

Recently LED fish-attracting lamps have been more widely used in fisheries as low-cost and high-efficiency fishing gear, and development of long-life high-efficiency lamps is required through the design of LED packages to optimize heat resistance. This study developed an improved LED fish-attracting lamp with excellent heat performance, which was verified using a numerical model. Heat-resistance design factors such as the heat-radiation fin shape, PCB type, and LED chip count were investigated and optimized. Comparison with a commercial 180-W LED fishing lamp showed that the increase in initial temperature was 40% higher than that of the surrounding LED chip because of design errors in contact thermal resistance. The 250-W LED lamp developed in this study has a characteristic with thermal rising in linearly stable according to the heat source. In addition, luminance efficiency was improved by 20-65% by using flow-visualization simulation. A decrease of 45% in total power consumption with a fuel-cost reduction of over 55% can be expected when using these optimized heat release design factors.

• 수산해양기술연구
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• 제33권4호
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• pp.311-320
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• 1997

제주도 연안 정치망어장에 다량 내유아여 어획되고 있는 전갱이,고등어, 오징어를 실험어로 하여 백열등에 의한 어군의 유집효과와 어군의 유도 효과에 관한 실험을제주대학교 해양연구소 옥외 수조에서 실시한결과를 요약하면 다음과 같다. 1. 백열등에 대한 전갱이, 고등어, 오징어 어군의 행동은 백열등에 잘 유집되는 경향을 보였으나, 백열등에 대해서 유집하는 적정조도와 반은행동은 어종에 따라 조금씩 다른 경향을 보였다. 2. 유도등을 한 등씩 순차적으로 점등후 소등하는 방법에 의한 전갱이, 고등어, 오징어어군의 행동양식은 어종에 따라서 약간 다르지만, 이들 어군을 목적지까지 유도할 수 있었다. 3. 유도등 3개를 모두 점등한 후 1번 등부터 순차적으로 한 등씩 소등하는 방법에 의한 전갱이, 고등어, 오징어 어군의 행동양식은 어종에 따라서 약간 다르지만, 이들 어군을 목적지까지 유도할 수 있었다. 4. 백열등의 이동에 의한 전갱이, 고등어, 오징어 어군의 행동양식은 어종에 따라서 약간 다르지만, 이들 어군을 목적지까지 유도할 수 있었다.

• 수산해양기술연구
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• 제28권3호
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• pp.243-251
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• 1992

The author examined the response of File fish, Stephanolepis Cirrhifer (TEMMINCK et SCHLEGEL) to the surface attracting lamps(0.5W, 0.8W, 1W) line in the experimental water tank (550L$\times$58W$\times$73H cm). the attracting rate was investigated in accordance with the interval of lighting and putting out hour (1, 5 minute)when each of the attracting lamps was gradually switched off after they were switched on all at once. The results are as follows: 1. Total distribution rate of fish in the illuminated section was 96.9%(mean 19.4%) in case of 1 minute interval, and 98.4%(mean 19.7%) in case of 5 minutes interval. 2. Mean distribution rate of fish at the illuminated section: \circled1 Distribution rate at interval of 1 minute were 19.9% in 0.8W, 19.3% in 1W and 18.9% in 0.5W respectively. \circled2 Distribution rate at interval of 5 minutes were 19.8% in 1W, 19.8% in 0.8W, and 19.5% in 0.5W respectively. 3. Attracting rate of the last section showed increasing as illuminating time elapse without interval and lighting source. 4. Attracting rate of fish in only last section switched on: \circled1 Attracting rate at interval in case of 1 minute were 98.0% in 1W, 97.0% in 0.5W and 83.0% in 0.8W respectively. \circled2 Attracting rate at interval in case of 5 minutes were 99.3% in 1W, 97.3% in 0.5W and 93.3% in 0.8W respectively.

• 수산해양기술연구
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• 제24권4호
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• pp.158-163
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• 1988

유도등예로써 집어된 어류를 목적 장소까지 유도하기 위하여 9개의 유도등을 동시에 점등한 후 1등씩 순차적으로 소등하는 방법으로 능성어 Epinephelus Septemfasciatus에 광자극을 주었을 때의 반응을 수상유도등과 수중유도등으로 구분 조사한 결과는 다음과 같다. 1. 유도등의 점등구간에서의 어류분포는 1) 소등한 구간에 인접한 소등구간에 다소 많이 분포하였다. 2) 수상유도등에 의한 어류분포가 수중유도등에 비해 인접구간에 따른 분포차가 더 컸다. 3) 유도등의 소등간격이 1분일때는 수상유도등이, 소등간격이 5분일때는 수중유도등에 의한 분포가 각각 더 많았다. 2. 최종구간에서의 유도율의 변화는 1) 시간이 경과함에 따라 유도율이 증가하는 경향을 보였다. 2)유도등의 소등간격이 1분일때는 수중유도등에 의한 유도율이, 소등간격이 5분일때는 수중유도등에 의한 유도율이 각각 더 높았다.

• 수산해양기술연구
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• 제35권4호
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• pp.397-403
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• 1999

The author examined the response of Amberjacks, Seriola quinqueradiata [TEMMINCI et SCHLIBEL] to the surface attracting lamps (0.5W, 0.8W, 1W) line in the experimental water tank (550 L$\times$58W$\times$73Hcm).The attracting rate was investigated in accordance with the intervals of lighting and putting out hour (1,5 minute) when each of the attracting lamps was gradually switched off after they were switched on all at once. The results are as follows:1. Total distribution rate of fish in the illuminated section was 92.4% (mean 18.5%) in case of 1 minute interval, and 95.8% (mean 19.2%) in case of 5 minutes interva. 2. Mean distribution rate of fish at the illuminated section: Distribution rate at interval of 1 minute were 19.0% in 1W, 18.4% in 0.5W, and 18.0% in 0.8W respectively. distribution rate at interval of 5 minutes were 19.5% in 1W, 19.2% in 0.5 W, and 18.8% in 0.8W respectively.3. Attracting rates of the last section showed very much increasing as illuminating time elapsed, but there was a little difference of attracting rates according to interval and lighting source. 4. Attracting rate of fish in only last section switched on : Attracting rate at interval in case of 1 minute were 97.0% in 1W, 86.0% in 0.8W and 74.0% in 0.5W respectively. Attracting rate at interval in case of 5 minutes were 97.3% in 1W, 90.0% in 0.5W and 88.0% in 0.8W respectively.

• 수산해양기술연구
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• 제34권3호
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• pp.302-308
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• 1998

The author examined the response of Yoroi-mebaru, Sebastes hubbsi [MATSUBARA] to the underwater attracting lamps (0.5 W, 0.8 W, 1 W) line in the experimental water tank (550 L x 58 W x 73 H cm). The attracting rate investigated in accordance with the intervals of lighting and putting out hour (1, 5 minutes) when each of the underwater attracting lamps was gradually switched off after they were switched on all at once. The results are a follows: 1. Distribution rates of fish in the illuminated area was 35.7 % in case of 1 minute interval, and 50.3 % in case of 5 minutes interval. 2. Mean distribution rate of fish at the illuminated section: \circled1 Distribution rates at interval of 1 minute were 9.8 % in 1 W, 6.5 % in 0.8 W and 5.1 % in 0.5 W, respectively. \circled2 Distribution rates at interval of 5 minutes were 15.6 % in 1 W, 8.5 % in 0.5 W and 6.1 % in 0.8 W, respectively. 3. Attracting rates of the last section showed a little increasing as illuminating time elapsed. A difference of attracting rates according to lighting source in 5 minutes interval were bigger than that in 1 minute interval. 4. Attracting rates of fish in only last section switched on: \circled1 Attracting rates at interval in case of 1 minute were 30.0 % in 0.8 W, 16.0 % in 1 W and 8.0 % in 0.5 W, respectively. \circled2 Attracting rates at interval in case of 5 minutes were 56.0 % in 1 W, 30.7 % in 0.5 W and 10.7 % in 0.8 W. respectively.

• 한국정보통신학회논문지
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• 제9권5호
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• pp.1052-1058
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• 2005

본 논문은 저주파 구동형 집어등용 전자식 안정기의 설계 및 제작에 관하여 기술하였다. 제.안한 안정기는 전파 정류회로, 정전력형 전류원으로 동작하는 강압형 컨버터와 130Hz 구형파 발진의 인버터 및 재점등 보호회로로 구성하였다. 램프의 음향공명현상은 130Hz의 저주파 구형 펄스로 제거할 수 있었으며, 램프의 재점등을 위한 고전압 펄스 발생회로를 부가하였다. 실험결과로부터 본 안정기에 의해 구동되는 램프 전압과 전류는 각각 132.5V, 7.6A, 소비전력은 약 1,000 W이었다. 전자식 안정기의 가장 큰 이점으로 중량은 동일 용량의 자기식 안정기에 비해 약 1/5로 감소하였다.

• 한국정보통신학회:학술대회논문집
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• 한국해양정보통신학회 2005년도 춘계종합학술대회
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• pp.273-276
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• 2005

This paper presents an electronic ballast using a step down converter, a low frequency inverter for high pressure discharge lamp. The proposed ballast is composed of a full-wave rectifier, a step down converter operated as a current source with power regulation and a low frequency inverter with ignition circuit. The ignition circuit generates high voltage pulse of 1${\sim}$2[kV] peak, 130[Hz]. Moreover, it is able to reignite at regular intervals by protective circuit. As experimental results on the test, lamp voltage, current and consumption power are measured 132.5[V], 7.6[A] and 1,005[W], respectively. It was confirmed that the designed ballast operate the lamp with a constant power.