Conference
Techno-Ocean
About: Techno-Ocean is an academic conference. The conference publishes majorly in the area(s): Underwater & Computer science. Over the lifetime, 136 publications have been published by the conference receiving 277 citations.
Papers
1 Jan 2016
TL;DR: The free fall type hadal zone research lander called Edokko No.1 as mentioned in this paper consists of 3 glass spheres and wireless connectable rubber bridge, and an observation equipment and levitation transponder device can be installed in the glass sphere.
Abstract: We were involved in development of a small lander for low-price and usability. The free fall type hadal zone research lander called “Edokko No.1” consists of 3 glass spheres and wireless connectable rubber bridge, and an observation equipment and levitation transponder device can be installed in the glass sphere. A continuous monitoring operation of periodic variations of surrounding ecosystem at deep-seabed is essential for acquiring baseline data and knowledge towards proposal of an appropriate methodology for underwater environmental impact assessment. In the demonstration test in 2013, the video of the hadal zone at the depth of 7800m has been acquired. By the bate trap survey, to observe the amphipods and a hadal fish (Pseudoliparis amblystomopsis). We will demonstrate the transition of deep-sea ecosystem. Time-lapse observation of the seabed is useful to an understanding of the seabed environment.
16 citations
1 Jan 2016
TL;DR: In this paper, a real-time multi-step GA for 3D model-based recognition for underwater vehicle was presented. But the performance of the proposed system was not analyzed.
Abstract: Genetic algorithm (GA) has been applied for real-time pose estimation in this research because of its simplicity, global perspective and repeatable ability. In many of these different situations or problems, optimum selection parameters are a critical factors in the performance of GA. We have developed visual-servo type underwater vehicle using dual-eye camera and 3D marker using real-time pose tracking, named as Real-time Multi-step GA. The relative pose between a vehicle and a 3D-marker can be estimated by Model-based matching method. To recognize the pose of the marker with respect to the vehicle, it is needed to utilize the optimum searching in real-time, and the real-time pose estimation problem can be converted into an optimization problem over a time-varying distribution function with multiple variables. Therefore, analyses the convergence performance of real-time multi-step GA for 3D model-based recognition for underwater vehicle was conducted and reported in this paper. The main aim of this paper is to choose the best parameters for GA that are optimized over population size, selection rate, mutation rate based on their relative fitness value to improve the performance of searching in time domain. The experimental results show that the proposed system effectively improved the searching performance of Real-time multi-step GA for real time pose tracking, having enable an automatic docking of underwater vehicle by dual-eyes visual servoing.
11 citations
1 Jan 2016
TL;DR: In this paper, a semi-submersible autonomous surface vehicle (ASV) was developed for control of multiple autonomous underwater vehicles (AUVs) with a cruising speed of 3 kt.
Abstract: A new autonomous surface vehicle (ASV) has been developed for control of multiple autonomous underwater vehicles (AUVs). Because it is semi-submersible type, the attitude in the sea surface waves is stable though the size is smaller than typical ASV. The cruising speed (3 kt) is confirmed in the testing basin. The operational concepts for control of multiple AUVs are discussed.
11 citations
1 Jan 2016
TL;DR: The DONET2 system and its installation technologies are introduced and it is shown how the system can be used for long-term and real time monitoring on the seafloor.
Abstract: DONET (Dense Oceanfloor Network System for Earthquakes and Tsunamis) is a cabled observation system for long-term and real time monitoring using precision sensors on the seafloor. The development and the manufacturing of DONET2 system were commenced in 2013, and the construction was completed on schedule in 2016. In this paper, the DONET2 system and its installation technologies are introduced.
10 citations
1 Jan 2016
TL;DR: An eigenvalue decomposition adaptive sliding mode controller (SMC) is presented base on the horizontal coupling yaw motion model and results indicate that the introduced adaptation law can eliminate the steady-state error and the capability of ship course keeping is improved.
Abstract: A surface ship sailing in the seaway usually encounters large yaw motions due to waves, which may lead to heading changed. According to the principle of course keeping and sliding mode control, an eigenvalue decomposition adaptive sliding mode controller (SMC) is presented base on the horizontal coupling yaw motion model. The simulation results indicate that the introduced adaptation law can eliminate the steady-state error and the capability of ship course keeping is improved.
9 citations
Performance Metrics
| Year | Papers |
|---|---|
| 2016 | 131 |
| 2010 | 1 |
| 2008 | 1 |
| 2006 | 1 |
| 1996 | 1 |
| 1994 | 1 |