ROV-Based Automated Cable-Laying System: Application to DONET2 Installation

Choi, Jin-Kyu; Yokobiki, Takashi; Kawaguchi, Katsuyoshi

doi:10.1109/joe.2017.2735598

Cited by 27 publications

(25 citation statements)

References 47 publications

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“…PBLi−MAX = Pm−i, i = 1, 2, 3…n, (12) where Vrefi is the reference voltage of controller i, PBLi−MAX is the maximum power consumed by BLi at the reference voltage Vrefi, and Pm−i is the constant output power of module i. The first requirement is achieved by designating controllers with different references (the difference between each other is very small).…”

Section: The Realization Of Ppmsmentioning

confidence: 99%

“…Therefore, P m−0 = I out0 × V ref0 = 88.8 W, P m−1 = I out1 × V ref1 = 87.9 W, P BL0−MAX = 92.2 W, P BL1−MAX = 90.3 W through Equation (14). Here, P BLi−MAX subjects to commercial-off-the-shelf resistors R 0 in BL and is unable to fully satisfy Equation (12). Table 1.…”

Section: Prototype Parametersmentioning

confidence: 99%

“…Due to the merit feature of shunt fault tolerance, CC mode observatories are widely adopted at scenarios requiring uninterrupted observation even with fault presence [5]. Existing CC observatories systems, including the Hawaii Undersea Geo-Observatory (HUGO) [6], the Hawaii-2 Observatory (H2O) [7,8], ALOHA Cabled Observatory (ACO) [9], the Development of Dense Ocean-floor Network System for Earthquakes and Tsunamis (DONET) [10,11], DONET2 [12,13], the Marine Cable Hosted Observatory (MACHO) [14], the Japan Trench Earthquake and Tsunami Monitoring Network Project (S-net Project) [15][16][17], etc., are all powered by CC mode and mainly used for long term observation around unstable geology seismic areas.…”

Section: Introductionmentioning

confidence: 99%

“…The underwater CC power system consists of multi-serial connection nodes that each tap a certain quantity of power from the constant current cable [18]. Considering stability problems due to parasitic parameters under long submarine cables, using a shunt regulator or similar principle to draw the required power is mainly used worldwide [19], such as HUGO, H2O, ACO, NONET, MACHO, DONET2 [6][7][8][9][10][11][12][13][14][15][16][17], etc. Figure 1a shows a typical CC/CV converter that comprises a shunt regulator and a DC/DC module [20].…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Reconfigurable Power Converter for Constant Current Underwater Observatory

et al. 2020

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A constant current (CC) underwater observatory employing the shunt method to provide constant voltage (CV) power for external loads is favored in occasions where shunt-fault tolerance is required. However, low efficiency of CC to CV conversion with the shunt method limits its application, especially in scenarios of varying loads. In this paper, a highly reliable and stable CC/CV converter with better efficiency is introduced based on the proposed novel active soft bypass (ASB) technology and the proposed novel priority-based power management strategy (PPMS). The ASB technology is a method that employs switches and a special control sequence which greatly depresses the large voltage transient presenting on the input side when trying hard bypass redundant modules, and the PPMS makes the system easy to monitor and ensures the absolute reliability of ASB technology. The theoretical study of this novel reconfigurable CC/CV converter and validation experiments on a prototype are carried out, with results showing great improvement in the performance. In addition, the proposed reconfigurable power converter is applied to a coastal observatory in the East China Sea.

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Section: The Realization Of Ppmsmentioning

confidence: 99%

Section: Prototype Parametersmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Reconfigurable Power Converter for Constant Current Underwater Observatory

et al. 2020

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“…Substituting Equations (18) into (19), the relationship between input current and output voltage of load can be obtained,…”

Section: Principle and Characteristic Analysis Of DC Constant Voltagementioning

confidence: 99%

Design, Analysis, and Modeling of an Isolated Constant-Current to Constant-Voltage Converter in Cabled Underwater Information Networks

et al. 2019

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The underwater electric energy conversion modules are the equipment for distributing electric energy to the electric instruments in the cabled underwater information networks (CUINs), which are also related to the normal and stable operation of the underwater systems, the energy foundation and an important part of the network platform. Based on the classic push-pull high frequency switching circuit of constant voltage conversion, an isolated constant-current to constant-voltage (CC-CV) converter based on pulse width modulation (PWM) feedback was proposed in this paper. Through the theoretical analysis of the working principle of the CC-CV converter and the modeling of the converter circuit based on the state space method, it was verified that the designed converter can achieve the constant current to constant voltage transformation by high-frequency PWM feedback. Based on Saber simulation software, the circuit model of the CC-CV converter was built, and the feasibility of the design was proved by simulation analysis. According to the isolated high-frequency switching CC-CV converter circuit, the physical prototype was made. By adjusting the resistance value of the output load, the constant voltage (CV) characteristic of the output voltage of the converter was analyzed. Furthermore, the results show that the output voltage of the designed CC-CV converter is stable and the ripple of output voltage is less than 5%, when the input current or output load resistance is adjusted under the CC output status, which has the CV output characteristic. The CC-CV converter has good rationality and feasibility, and is suitable for the future development of the constant current remote power supply system of CUINs.

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ROV-based binocular vision system for underwater structure crack detection and width measurement

et al. 2022

Multimed Tools Appl

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ROV-Based Automated Cable-Laying System: Application to DONET2 Installation

Cited by 27 publications

References 47 publications

Reconfigurable Power Converter for Constant Current Underwater Observatory

Reconfigurable Power Converter for Constant Current Underwater Observatory

Design, Analysis, and Modeling of an Isolated Constant-Current to Constant-Voltage Converter in Cabled Underwater Information Networks

ROV-based binocular vision system for underwater structure crack detection and width measurement

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