Extendible Underwater Positioning and Communication System for - - PowerPoint PPT Presentation
Extendible Underwater Positioning and Communication System for AUVs Alison Proctor WUWNet 2011 Seattle, WA Friday December 2, 2011 1 Presentation Outline Conceptual Overview Potential Applications Development Facilities
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WUWNet 2011 – Seattle, WA Friday December 2, 2011
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– Ocean Technology Test Bed – Underwater Vehicles
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Initial Thoughts on the future AUV Operations
– Aging fleet of vessels for scientific research – More research requires underwater vehicles typically needs dedicated ship time
– Not as easy to operate as some people advertise and can present challenges for an inexperienced crew. – Do require surface support – albeit different from the support required for ROVs
commercially were developed with ROV work in mind and the features are not necessarily optimized for AUVs – Often ship centric or take a long time to deploy – Don’t support communication between multiple underwater vehicles
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Objectives
– Allows a single ship to monitor multiple vehicles working on multiple projects at different sites around the ship – Provides high bandwidth communication between the ship and the work sites – Provides communication between the vehicles on-site – Supports differing levels of positioning accuracy – Installation time can be tailored to the application – Can be migrated to allow a small system to facilitate a large survey area without extensive redeployment time
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Support Vessel ROV Work Site #1 Small Tending Craft Work Site #3 Work Site #2
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Objectives
– Allows a single ship to monitor multiple vehicles working on multiple projects at different sites around the ship – Provides high bandwidth communication between the ship and the work sites – Provides communication between the vehicles on-site – Supports differing levels of positioning accuracy – Installation time can be tailored to the application – Can be migrated to allow a small system to facilitate a large survey area
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Why could this be useful
– External positioning systems allow AUVs with less expensive inertial sensors to perform more useful data collection tasks – Less expensive vehicles are essential to enable the proliferation
– High latitude locations or areas with magnetic disturbances can present additional challenges for inertial navigation solutions – These challenges can be mitigated by an accurate local positioning system
– Inter-vehicle communication – High data rate communication to supervising ship – Flexible tools for vehicle supervision
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Support Vessel ROV Work Site #1 Small Tending Craft Work Site #3 Work Site #2
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Surface Component
– Exterior diameter 8m , inner 4m Underwater Platform
lowered using a hydraulic winch
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Platform Control Module (PCM)
– Nominal power up to 1kW and
supply up to 3kW – Voltage, current, and GF monitoring at 1kHz
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IAS Towers x 5 ACM
Integrated Acoustic System (IAS)
– Track multiple targets with update rate of ~1Hz
±10cm
from 65-150m
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Acoustic Towers
(not a trawl resistant design)
– 10-80kHz
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hardware – Matlab interface
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Network Overview
back to UVic and Internet – Allows users to access streaming video or data.
LAN (VLAN) through Virtual Private Networking Software (VPN)
to surface vessels through the long range wireless data system. – Coverage over entire operating area with 15Mbps bandwidth – Operators in the boat are in continuous communication with the underwater instruments
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Other OTTB Assets
– Hydraulic A-frame and winch – Small interior work area
– +/-2cm accuracy – positions integrated into OTTB tracking system
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The OTTB is well suited to aid in the development and testing
acoustic tracking and communications.
instrumentation, surveys.
mapping, ocean chemistry and biology.
The easy of deployment and remote monitoring system make the OTTB an ideal place for both short and long term research and technology development projects.
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http://web.uvic.ca/~lacir/ocean