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Title: An acoustically controlled tetherless underwater vehicle for installation and maintenance of neutrino detectors in the deep ocean

Abstract

The task of installing and servicing high energy neutrino detectors in the deep ocean from a surface support vessel is problematic using conventional tethered systems. An array of multiple detector strings rising 500 m from the ocean floor, and forming a grid with 50 m spacing between the strings, presents a substantial entanglement hazard for equipment cables deployed from the surface. Such tasks may be accomplished with fewer risks using a tetherless underwater remotely operated vehicle that has a local acoustic telemetry link to send control commands and sensor data between the vehicle and a stationary hydrophone suspended above or just outside the perimeter of the work site. The Phase I effort involves the development of an underwater acoustic telemetry link for vehicle control and sensor feedback, the evaluation of video compression methods for real-time acoustic transmission of video through the water, and the defining of local control routines on board the vehicle to allow it to perform certain basic maneuvering tasks autonomously, or to initiate a self-rescue if the acoustic control link should be lost. In Phase II, a prototype tetherless vehicle system will be designed and constructed to demonstrate the ability to install cable interconnections within a detectormore » array at 4 km depth. The same control technology could be used with a larger more powerful vehicle to maneuver the detector strings into desired positions as they are being lowered to the ocean floor.« less

Authors:
Publication Date:
Research Org.:
Deep Ocean Engineering, Inc., San Leandro, CA (US)
Sponsoring Org.:
US Department of Energy (US)
OSTI Identifier:
765440
DOE Contract Number:
FG03-97ER82356
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: 1 Feb 1997
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ACOUSTICS; CABLES; COMPRESSION; EVALUATION; FEEDBACK; MAINTENANCE; NEUTRINOS; SUBMARINES; TELEMETRY; WATER; TETHERLESS; UMBILICAL; CABLE UNMANNED; UNTETHERED; UUV; REMOTELY; OPERATED; VEHICLE; ROV; NEUTRINO; DEEP; OCEAN; ACOUSTIC; VIDEO

Citation Formats

Ballou, Philip J. An acoustically controlled tetherless underwater vehicle for installation and maintenance of neutrino detectors in the deep ocean. United States: N. p., 1997. Web. doi:10.2172/765440.
Ballou, Philip J. An acoustically controlled tetherless underwater vehicle for installation and maintenance of neutrino detectors in the deep ocean. United States. doi:10.2172/765440.
Ballou, Philip J. Sat . "An acoustically controlled tetherless underwater vehicle for installation and maintenance of neutrino detectors in the deep ocean". United States. doi:10.2172/765440. https://www.osti.gov/servlets/purl/765440.
@article{osti_765440,
title = {An acoustically controlled tetherless underwater vehicle for installation and maintenance of neutrino detectors in the deep ocean},
author = {Ballou, Philip J.},
abstractNote = {The task of installing and servicing high energy neutrino detectors in the deep ocean from a surface support vessel is problematic using conventional tethered systems. An array of multiple detector strings rising 500 m from the ocean floor, and forming a grid with 50 m spacing between the strings, presents a substantial entanglement hazard for equipment cables deployed from the surface. Such tasks may be accomplished with fewer risks using a tetherless underwater remotely operated vehicle that has a local acoustic telemetry link to send control commands and sensor data between the vehicle and a stationary hydrophone suspended above or just outside the perimeter of the work site. The Phase I effort involves the development of an underwater acoustic telemetry link for vehicle control and sensor feedback, the evaluation of video compression methods for real-time acoustic transmission of video through the water, and the defining of local control routines on board the vehicle to allow it to perform certain basic maneuvering tasks autonomously, or to initiate a self-rescue if the acoustic control link should be lost. In Phase II, a prototype tetherless vehicle system will be designed and constructed to demonstrate the ability to install cable interconnections within a detector array at 4 km depth. The same control technology could be used with a larger more powerful vehicle to maneuver the detector strings into desired positions as they are being lowered to the ocean floor.},
doi = {10.2172/765440},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Sat Feb 01 00:00:00 EST 1997},
month = {Sat Feb 01 00:00:00 EST 1997}
}

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