Spacer
Product News
Product News > ROV Coordinate Estimation With 0.07% Slant Range Accuracy

ROV Coordinate Estimation With 0.07% Slant Range Accuracy

  18/01/2012
The Evologics S2C USBL (Ultra-Short Baseline) underwater positioning system demonstrated a consistent performance in a recent series of pool tests, estimating the position of an ROV for baffle bolt inspection in nuclear power plants. The system estimated the distance to the ROV resulting in a RMS deviation of 0.04 at 2.1m distance. This result corresponds to a 0.07% 1 drms slant range accuracy.
 

The Submarine System For Inspection (SUSI) ROV, developed by AREVA, is a device used for ultasonic inspection of nuclear reactor vessel baffle bolts. The ROV's positioning system is required to document time and exact location of each measurement taken as the ROV examines numerous bolts that hold the baffle plates together. Such positioning must deliver an accurate performance without obstructing or slowing down the inspection procedure.

 

In December 2011, the Evologics USBL system was tested in a tracking scenario that emulates the testing procedure. These trials were conducted in a test pool, as such a positioning system must deliver accurate results in a confined space, where noise and multipath challenge the performance of underwater acoustic devices.

 

An S2C USBL device with a conical transducer beam pattern served as a transceiver and was mounted at the side of the test pool. An S2C underwater acoustic modem, mounted on the ROV with the transucer pointing vertically upwards, was used as a transponder. The ROV was located at the bottom of the pool within the transceiver's transducer beam.

 

To verify the results, the ROV was moved across a vertical 85x100mm testing grid with reference points that represented the actual baffle bolts. The system demonstrated consistent results and the 0.07% slant range accuracy was confirmed.

 

 




comments powered by Disqus
Read more about:
 Tracking  ROV  USBL  Positioning  vessel 

Supplier: EvoLogics GmbH

More news from this supplier:
USV as Mobile Testbed for Developers
EvoLogics Launches High-speed Mini Modem
Dead Sea Underwater Freshwater Springs Surveyed with USV
Acoustic Link for Real-time Tsunami Monitoring System in Japan
SUNRISE Project Connects AUV Swarms into Internet of Things
EvoLogics to Unveil a Series of Compact Underwater Acoustic Modems
Upgraded Developer Edition Modems UnetStack-compatible
Running Virtual Underwater Modems
Fleet Of Autonomous Vehicles Connected Into Acoustic Network
Collaborative Underwater Communication Projects


Transas Expands Global ECDIS Training Network in China
VideoRay Sonar Training for Aquifer Inspections
Underwater Positioning System for French Research Institute CPPM
New Men for MARS at Planet Ocean
Submersible for Deep Underwater Exploration
ITLOS Tribunal Reaches out to Orient
German Oceanographers Provide Further Insights into MH370
Survey Operations Completed on Holyhead Deep Green
RV Neil Armstrong Completes Acceptance Trials
CSEM Gas Hydrate Survey Completed in Japan
Spacer
Spacer
Spacer
Spacer
Upcoming Events
Spacer
SubseaTech CAT Surveyor ASV

 

CAT-Surveyor is a catamaran type drone (3m long), with tele-operated and automatic navigation modes, allowing hydrographic data acquisition and/or port/inland above and under water surveillance. With its open architecture and high-speed PC to PC communication the system permits easy integration and deployment of sensors such as video day/night cameras, side scan sonar, multibeam sonar, acoustic cameras, sediment sounders, magnetometers, physico-chemical sensors, etc. 

 

Spacer
Last 3 items:
Spacer
Last Comments
Spacer
Spacer
Spacer
Spacer
Spacer