• Title/Summary/Keyword: 심해 원격조종 무인잠수정

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Explorations of Hydrothermal Vents in Southern Mariana Arc Submarine Volcanoes using ROV Hemire (심해무인잠수정 해미래를 이용한 남마리아나 아크 해저화산 열수분출공 탐사)

  • Lee, Pan-Mook;Jun, Bong-Huan;Baek, Hyuk;Kim, Banghyun;Shim, Hyungwon;Park, Jin-Yeong;Yoo, Seong-Yeol;Jeong, Woo-Young;Baek, Sehun;Kim, Woong-Seo
    • Journal of Ocean Engineering and Technology
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    • v.30 no.5
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    • pp.389-399
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    • 2016
  • This paper presents the explorations of hydrothermal vents located in the Marina Arc and Back Arc Basin using the deep-sea ROV Hemire. These explorations were conducted by KRISO and KIOST to demonstrate the capability of Hemire in various applications for deep-sea scientific research. The missions included the following: (1) to search the reported vents, (2) conduct visual inspections, (3) deploy/recover a sediment trap and bait traps, (4) sample sediment/water/rock, (5) measure the magnetic field at the vent site, and (6) acquire a detailed map using multi-beam sonar near the bottom. We installed three HD cameras for precise visual inspection, a high-temperature thermometer, a three-component magnetometer, and a multi-beam sonar to acquire details of the bottom contour or identify vents in the survey area. The explorations were performed in an expedition from March 23 to April 5, 2016, and the missions were successfully completed. This paper discusses the operational process, navigation, and control of Hemire, as well as the exploration results.

Operational Improvement of Hemire ROV for Deep-sea Survey and Application to Exploration of Ferromanganese Crusts of Western Pacific Seamount (해미래의 심해탐사 운용기법 개선 및 서태평양 해저산 망간각 탐사에 적용)

  • Baek, Hyuk;Park, Jin-Yeong;Shim, Hyungwon;Jun, Bong-Huan;Lee, Pan-Mook
    • Journal of Ocean Engineering and Technology
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    • v.32 no.4
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    • pp.287-295
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    • 2018
  • This paper presents the results of an exploration of the ferromanganese crusts of Western Pacific Seamount registered by the Korean government. This area has been surveyed with a deep-sea camera and crust samples have been acquired by deep-sea dredging since 2013. On October 18-19, 2017, a united research team from KIOST and KRISO explored two blocks, OSM11 and OSM07, on the seamount using Hemire ROV. A precise survey was conducted on the ferromanganese crusts and sediments covering the slope/top of OSM11 and the middle flat area of OSM07. Rock samples were collected with precise positioning, and HD videos were recorded for 7 hours. This paper discusses the technical issues of this exploration in terms of (1) how to deal with an emergency situation during an electric power blackout, (2) the improvement of the thruster power by adding cooling plugs to the housings of the thruster amplifiers, (3) the relative motion of the depressor by changing the fixing method of the cable terminator, which affects the service life of the cable, (4) a sampling technique for the steep slope of the seamount, (5) integrated navigation under a USBL blackout, and (6) a 3-dimensional image mosaic for visualizing the distribution state of the crusts.

Multi-beam Echo Sounder Operations for ROV Hemire - Exploration of Mariana Hydrothermal Vent Site and Post-Processing (심해무인잠수정 해미래를 이용한 다중빔 음향측심기의 운용 - 마리아나 열수해역 탐사 결과 및 후처리 -)

  • Park, Jin-Yeong;Shim, Hyungwon;Lee, Pan-Mook;Jun, Bong-Huan;Baek, Hyuk;Kim, Banghyun;Yoo, Seong-Yeol;Jeong, Woo-Young
    • Journal of Ocean Engineering and Technology
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    • v.31 no.1
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    • pp.69-79
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    • 2017
  • This paper presents the operations of a multi-beam echo sounder (MBES) installed on the deep-sea remotely operated vehicle (ROV) Hemire. Hemire explored hydrothermal vents in the Forecast volcano located near the Mariana Trench in March of in 2006. During these explorations, we acquired profiling points on the routes of the vehicle using the MBES. Information on the position, depth, and attitude of the ROV are essential to obtain higher accuracy for the profiling quality. However, the MBES installed on Hemire does not have its own position and depth sensors. Although it has attitude sensors for roll, pitch, and heading, the specifications of these sensors were not clear. Therefore, we had to merge the high-performance sensor data for the motion and position obtained from Hemire into the profiling data of the MBES. Then, we could properly convert the profiling points with respect to the Earth-fixed coordinates. This paper describes the integration of the MBES with Hemire, as well as the coordinate conversion between them. Bathymetric maps near the summit of the Forecast volcano were successfully collected through these processes. A comparison between the bathymetric maps from the MBES and those from the Onnuri Research Vessel, the mother ship of the ROV Hemire for these explorations, is also presented.