A Compact, Low-Cost Computer Interfaced Video Positioning System

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Authors
  1. Dittman, R.D.
Corporate Authors
Defence Research Establishment Atlantic, Dartmouth NS (CAN);Marentec, Dartmouth NS (CAN)
Abstract
An optical positioning system was designed to measure the shape of a hydrophone array underwater. The prototype used a small sensitive black and white camera as the positional detector and high intensity light emitting diodes (LEDs) as tracking targets. The system was examined for its potential range capabilities and spatial resolution underwater. Tests were conducted specifically on the range limits of the system in both freshwater and seawater. The results suggested that the system allowed target positions to be determined at ranges up to 65 m from the camera with a lateral accuracy of 26 cm. They also indicated, however, that water-born attenuation could dramatically reduce the system's operational range limit. Field tests in near-shore waters of Nova Scotia found ranges that were closer to 20 metres at the time of the tests with the expected lateral accuracy.

Il y a un résumé en français ici.

Keywords
Array element localization;Positionng system
Report Number
DREA-CR-2001-198 — Contractor Report
Date of publication
01 Dec 2001
Number of Pages
25
DSTKIM No
CA021234
CANDIS No
517968
Format(s):
Hardcopy;Document Image stored on Optical Disk

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