Resistance calculation and motion simulation for deep sea open-framed remotely operated vehicle based on hydrodynamics test

2012 ◽  
Author(s):  
Shibo Fan ◽  
Lian Lian ◽  
Ping Ren ◽  
Lei Ao
Keyword(s):  
Deep Sea ◽  
Motion Simulation ◽  
Remotely Operated Vehicle

A Multi-Body Space-Coupled Motion Simulation for a Deep-Sea Tethered Remotely Operated Vehicle

2008 ◽  
Vol 20 (2) ◽  
pp. 210-215 ◽  
Author(s):  
Ke-qiang Zhu ◽  
Hai-yang Zhu ◽  
Yu-song Zhang ◽  
Jie Gao
Keyword(s):  
Deep Sea ◽  
Motion Simulation ◽  
Remotely Operated Vehicle ◽  
Coupled Motion ◽  
Multi Body

scholarly journals Development of an Easy-to-Operate Underwater Raman System for Deep-Sea Cold Seep and Hydrothermal Vent In Situ Detection

Sensors ◽  
2021 ◽  
Vol 21 (15) ◽  
pp. 5090
Author(s):  
Qingsheng Liu ◽  
Jinjia Guo ◽  
Wangquan Ye ◽  
Kai Cheng ◽  
Fujun Qi ◽  
...  
Keyword(s):  
Deep Sea ◽  
Hydrothermal Vent ◽  
Methane Hydrate ◽  
Sulfur Cycle ◽  
Cold Seep ◽  
Remotely Operated Vehicle ◽  
Bacterial Mats ◽  
Optical Module ◽  
In Situ Detection

As a powerful in situ detection technique, Raman spectroscopy is becoming a popular underwater investigation method, especially in deep-sea research. In this paper, an easy-to-operate underwater Raman system with a compact design and competitive sensitivity is introduced. All the components, including the optical module and the electronic module, were packaged in an L362 × Φ172 mm titanium capsule with a weight of 20 kg in the air (about 12 kg in water). By optimising the laser coupling mode and focusing lens parameters, a competitive sensitivity was achieved with the detection limit of SO42− being 0.7 mmol/L. The first sea trial was carried out with the aid of a 3000 m grade remotely operated vehicle (ROV) “FCV3000” in October 2018. Over 20,000 spectra were captured from the targets interested, including methane hydrate, clamshell in the area of cold seep, and bacterial mats around a hydrothermal vent, with a maximum depth of 1038 m. A Raman peak at 2592 cm−1 was found in the methane hydrate spectra, which revealed the presence of hydrogen sulfide in the seeping gas. In addition, we also found sulfur in the bacterial mats, confirming the involvement of micro-organisms in the sulfur cycle in the hydrothermal field. It is expected that the system can be developed as a universal deep-sea survey and detection equipment in the near future.

scholarly journals Spatial Representation of NOAA’s Remotely Operated Vehicles (ROVs) Dive Tracks

2020 ◽  
Author(s):  
◽  
Moses Thiong'o
Keyword(s):  
Deep Sea ◽  
Spatial Representation ◽  
Continental Margins ◽  
Monterey Bay ◽  
Remotely Operated Vehicle ◽  
Technology Program ◽  
Location Data ◽  
Research Technology ◽  
Deep Sea Corals ◽  
The Many

The oceans make up about 70% of the earth’s surface and serve as habitats for many deep and shallow creatures. In depths of about 50 meters and more, deep-sea corals and sponges occur mostly along seamounts, continental margins, undersea canyons and ridges. They, deep-sea corals and sponges, play a key role in supporting the health of the ocean as they preserve the biodiversity and long-term sustainability of commercial and recreational fish species. With the many benefits that are attached to deep-sea corals and sponges, the Deep-Sea Corals and Research Technology Program (DSCRTP) has been collecting coral and sponge location data from hundreds of remotely operated vehicle (ROV) surveys. However, DSCRTP does not have a spatial representation of the area covered by each ROV while searching for corals and sponges in the deep-sea. A spatial representation would provide critical information to researchers and managers to understand where a survey for corals and sponges has happened, and where a survey is yet to be done in the deep-sea. Therefore, the goal of this study is to create a spatial representation of the ROV surveys that have been collected in Monterey Bay and Hawaii sections of the deep-sea.

Depth Profiling Investigation of Seawater Using Combined Multi-Optical Spectrometry

2020 ◽  
Vol 74 (5) ◽  
pp. 563-570 ◽  
Author(s):  
Wangquan Ye ◽  
Jinjia Guo ◽  
Nan Li ◽  
Fujun Qi ◽  
Kai Cheng ◽  
...  
Keyword(s):  
Deep Sea ◽  
Depth Profiling ◽  
Deep Ocean ◽  
Euphotic Zone ◽  
Depth Resolution ◽  
Remotely Operated Vehicle ◽  
Sea Trial ◽  
Depth Profiles ◽  
Diving Depth ◽  
Optical Spectrometry

Depth profiling investigation plays an important role in studying the dynamic processes of the ocean. In this paper, a newly developed hyphenated underwater system based on multi-optical spectrometry is introduced and used to measure seawater spectra at different depths with the aid of a remotely operated vehicle (ROV). The hyphenated system consists of two independent compact deep-sea spectral instruments, a deep ocean compact autonomous Raman spectrometer and a compact underwater laser-induced breakdown spectroscopy system for sea applications (LIBSea). The former was used to take both Raman scattering and fluorescence of seawater, and the LIBS signal could be recorded with the LIBSea. The first sea trial of the developed system was taken place in the Bismarck Sea, Papua New Guinea, in June 2015. Over 4000 multi-optical spectra had been captured up to the diving depth about 1800 m at maximum. The depth profiles of some ocean parameters were extracted from the captured joint Raman–fluorescence and LIBS spectra with a depth resolution of 1 m. The concentrations of [Formula: see text] and the water temperatures were measured using Raman spectra. The fluorescence intensities from both colored dissolved organic matter (CDOM) and chlorophyll were found to be varied in the euphotic zone. With LIBS spectra, the depth profiles of metallic elements were also obtained. The normalized intensity of atomic line Ca(I) extracted from LIBS spectra raised around the depth of 1600 m, similar to the depth profile of CDOM. This phenomenon might be caused by the nonbuoyant hydrothermal plumes. It is worth mentioning that this is the first time Raman and LIBS spectroscopy have been applied simultaneously to the deep-sea in situ investigations.

The hydroid and early medusa stages of the deep sea jellyfish Earleria purpurea (Hydrozoa: Mitrocomidae) from the Monterey Bay Submarine Canyon, USA

Zootaxa ◽  
2011 ◽  
Vol 2902 (1) ◽  
pp. 59
Author(s):  
CHAD L. WIDMER
Keyword(s):  
Life Cycle ◽  
Deep Sea ◽  
Submarine Canyon ◽  
Monterey Bay ◽  
Remotely Operated Vehicle ◽  
Free Swimming

The hydroid and early medusa stages of the deep sea hydrozoan jellyfish Earleria purpurea (Hydrozoa: Mitrocomidae) are described. Mature medusae were collected from the Monterey Bay submarine canyon near Monterey, California, USA utilizing a remotely operated vehicle and returned to the laboratory for culturing. In vitro fertilized eggs developed into free-swimming planulae larvae that settled and metamorphosed into benthic hydroid colonies consisting of feeding hydranths and medusa producing gonangia. Newly released medusae were grown to maturity and placed on educational display at the Monterey Bay Aquarium. The hydranths and gonangia were compared and found to be distinct from those of E. corachloeae the only other member of the Genus Earleria with a described life cycle.

Crawler System for Deep Sea ROVs

2009 ◽  
Vol 43 (5) ◽  
pp. 97-104 ◽  
Author(s):  
Tomoya Inoue ◽  
Tokihiro Katsui ◽  
Hisataka Murakami ◽  
Ken Takagi
Keyword(s):  
Deep Sea ◽  
Center Of Gravity ◽  
Water Tank ◽  
Normal Type ◽  
Remotely Operated Vehicle ◽  
Sea Floor ◽  
System A ◽  
Stable Area

AbstractIn order to reduce tension on a cable and process movability, a deep sea remotely operated vehicle (ROV) is designed to reduce its weight. However, a lightweight ROV is apt to wheelie when running by means of a crawler system. To run stably in counterpoise, the combination of the center of gravity and the center of buoyancy should be in an adequate area called the “stable area,” which by theory can be obtained as corresponding to the weight and the buoyancy. The stable area becomes small as the weight is light. The combination of the center of gravity and the center of buoyancy is designed to be in the stable area. However, it is important for the ROV to run forward and backward, which results in changing the discrimination of the stable area. This sometimes causes the center of gravity and the center of buoyancy to be outside the stable area. Thus, it is advantageous to increase the weight only when running by crawler system and to change the center of gravity meaningfully. Furthermore, the flipper-type crawler system is advantageous when running on the sea floor with inclination or undulation. This paper proposes a method to virtually increase the weight and to change the center of gravity by using thrusters. This paper also describes the flipper-type crawler system that improves movability when running on the sea floor with inclination or undulation. Furthermore, we conducted preliminary experiments in a water tank using a small-size ROV having four thrusters and a crawler system, a normal-type crawler, and a flipper-type crawler system, to confirm the advantages.

scholarly journals Parametric sub-bottom profiler for remotely operated vehicle in deep sea.

1993 ◽  
Vol 20 (1) ◽  
pp. 26-36 ◽  
Author(s):  
Tosiaki NAKAMURA ◽  
Toshio TSUCHIYA ◽  
Yasutaka AMITANI ◽  
Hideharu MORIMATSU
Keyword(s):  
Deep Sea ◽  
Remotely Operated Vehicle

scholarly journals The First Cut Is the Deepest: Trawl Effects on a Deep-Sea Sponge Ground Are Pronounced Four Years on

2020 ◽  
Vol 7 ◽  
Author(s):  
Katelin M. Morrison ◽  
Heidi Kristina Meyer ◽  
Emyr Martyn Roberts ◽  
Hans Tore Rapp ◽  
Ana Colaço ◽  
...  
Keyword(s):  
Arctic Ocean ◽  
Deep Sea ◽  
Multivariate Analyses ◽  
Benthic Communities ◽  
Bottom Trawl ◽  
Physical Disturbance ◽  
Remotely Operated Vehicle ◽  
The Status ◽  
And Control ◽  
Distinct Separation

Few studies have described the effects of physical disturbance and post-recovery of deep-sea benthic communities. Here, we explore the status of deep-sea sponge ground communities four years after being impacted by an experimental bottom trawl. The diversity and abundance of epibenthic megafauna of two distinct benthic communities in disturbed versus control areas were surveyed using a remotely operated vehicle on the Schulz Bank, Arctic Ocean. Four years after disturbance, megafaunal densities of the shallow (∼600 m depth) and deep (∼1,400 m depth) sites were significantly lower on the disturbed patches compared to the control areas. Multivariate analyses revealed a distinct separation between disturbed and control communities for both sites, with trawling causing 29–58% of the variation. Many epibenthic morphotypes were significantly impacted by the trawl, including ascidians, Geodia parva, Hexactinellida spp., Craniella infrequens, Lissodendoryx complicata, Haliclonia sp. Stylocordyla borealis, Gersemia rubiformis and Actiniaria sp. However, we found some smaller morphospecies to be equally abundant with control transects, including Polymastia thielei, Geodia hentscheli, and Stelletta rhaphidiophora, reflecting lower trawl impact for these morphotypes. Overall, our results suggest that these are fragile ecosystems that require much more time than four years to recover from physical disturbance typical of trawling activities.

scholarly journals Underwater navigation using visual markers in the context of intervention missions

2019 ◽  
Vol 16 (2) ◽  
pp. 172988141983896 ◽  
Author(s):  
Arturo Gomez Chavez ◽  
Christian A Mueller ◽  
Tobias Doernbach ◽  
Andreas Birk
Keyword(s):  
Deep Sea ◽  
Vision System ◽  
Field Tests ◽  
Gas Production ◽  
Remotely Operated Vehicle ◽  
Christmas Trees ◽  
Visual Markers ◽  
Underwater Navigation ◽  
Underwater Manipulation

Intervention missions, that is, underwater manipulation tasks, for example, in the context of oil-&-gas production, require a high amount of precise, robust navigation. In this article, we describe the use of an advanced vision system suited for deep-sea operations, which in combination with artificial markers on target structures like oil-&-gas production-Christmas-trees significantly boosts navigation performance. The system is validated in two intensive field tests running off the shore of Marseille, France. In the experiments, a commercial remotely operated vehicle equipped with the system and a mock-up structure with an oil-&-gas production panel is used to evaluate the navigation performance.

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