Upload
dale-jerome-hoover
View
218
Download
0
Tags:
Embed Size (px)
Citation preview
Telemetry Using IEEE802.11g for Monitoring Target ShipsTelemetry Using IEEE802.11g for Monitoring Target Ships
Author: Mr. Germano Gonçalves CapelaAuthor: Mr. Germano Gonçalves Capela Mr. Nuno Pessanha SantosMr. Nuno Pessanha Santos
Portuguese Naval AcademyPortuguese Naval Academy
AFCEA Award for European Excellence in a AFCEA Award for European Excellence in a Scientific Project 2009Scientific Project 2009
19-04-2319-04-23
•Motivation
•Objectives
•System’s Layout
•Tests and Results
•Conclusions
•Future Work
OutlineOutline
04/19/2304/19/23 European Excellence in a Scientific Project 2009European Excellence in a Scientific Project 2009 22
19-04-2319-04-23 33
MotivationMotivation
• The genesis of this project was the interest of the
Portuguese Navy (PON) in measuring physical
parameters over long distances.
• These parameters were the result of a missile impact
on a naval platform (decommissioned ship).
European Excellence in a Scientific Project 2009European Excellence in a Scientific Project 2009
19-04-2319-04-23 44
ObjectivesObjectives
• Understand and define which physical parameters
should be measured;
• Design and assemble a low cost system capable of
performing telemetry over long distances;
• Test the system in close to real conditions.
European Excellence in a Scientific Project 2009European Excellence in a Scientific Project 2009
19-04-2319-04-23 55
System’s LayoutSystem’s Layout
The system can be divided into two parts:1. Wireless communication;2. Data gathering.
1.Wireless communication IEEE802.11g standard
(compatible with LAN’s, common routers with wireless,
amplifiers and antennas).
2.Data gathering Dataloggers (associated with
sensors) with LAN interface, high resolution and high
sample rate.
European Excellence in a Scientific Project 2009European Excellence in a Scientific Project 2009
19-04-2319-04-23 66
A video camera was added to record some images from the impact (in the measuring station).
European Excellence in a Scientific Project 2009European Excellence in a Scientific Project 2009
Accelerometer
Pressure Sensors
Temperature Sensors
Camera
Data Logger
Router Router
Wireless Bridge Link
Computer
System’s LayoutSystem’s Layout
19-04-2319-04-23 77
Based on “Off-the-shelfOff-the-shelf” equipment:
RoutersRouters: Linksys model WRT54GS V7
AmplifiersAmplifiers:: Hyperlink Technologies model DS HA2402GX-NF
AntennasAntennas:: Ferimex model OMNI H
Data loggersData loggers: Data Instrument model DI-710-EL
Digital cameraDigital camera: : Trendnet model TV-IP 100
European Excellence in a Scientific Project 2009European Excellence in a Scientific Project 2009
System’s LayoutSystem’s Layout
19-04-2319-04-23 88
TestsTestsIn order to prove the measurement concept, two tests were made:
•Laboratory tests to all equipment in order to verify their own specific characteristics;
• Some tests were made to validate the system in similar conditions to real situations.
European Excellence in a Scientific Project 2009European Excellence in a Scientific Project 2009
19-04-2319-04-23 99
Laboratory TestsLaboratory Tests•Routers’ output powerRouters’ output power
•Using a Spectrum Analyzer
•Amplifiers’ output powerAmplifiers’ output power•Using a Spectrum Analyzer
•Antenna’s frequency responseAntenna’s frequency response•Using a Network Analyzer
To To selectselect thethe best IEEE802.11g best IEEE802.11g channelchannel to to work withwork with
To confirm the output powerTo confirm the output power
To confirm the amplifier´s output To confirm the amplifier´s output powerpower
European Excellence in a Scientific Project 2009European Excellence in a Scientific Project 2009
19-04-2319-04-23 1010
Best channel was number 1111
20dBm20dBm of output power
13dB13dB of amplification
European Excellence in a Scientific Project 2009European Excellence in a Scientific Project 2009
Laboratory TestsLaboratory Tests
19-04-2319-04-23 1111
Five different configurations were tested to choose the best antenna arrangement.
CONFIGURATICONFIGURATIONON
ROUTER ROUTER 11
ANTENNASANTENNASROUTER ROUTER 2 2
ANTENNASANTENNAS
RightRight LeftLeft RightRight LeftLeft
1TX/RX
OFFTX/RX
OFF
2AUT
OAUT
OAUTO
AUTO
3 OFFTX/RX
OFFTX/RX
4TX/RX
OFF OFFTX/RX
5 OFFTX/RX
TX/RX
OFF
European Excellence in a Scientific Project 2009European Excellence in a Scientific Project 2009
Laboratory TestsLaboratory Tests
19-04-2319-04-23 1212
The best antenna configuration is configuration number 5
CONFIGURATICONFIGURATIONON
ROUTER ROUTER 11 ROUTERROUTER 2 2
RightRight LeftLeft RightRight LeftLeft
5 OFF TX/RX TX/RX OFFEuropean Excellence in a Scientific Project 2009European Excellence in a Scientific Project 2009
Laboratory TestsLaboratory Tests
19-04-2319-04-23 1313
A series of tests were made in order to determine the required bandwidth, using the following setup:
Data: Data: 15 KB/s15 KB/sVideo: Video: 200 KB/s200 KB/s
European Excellence in a Scientific Project 2009European Excellence in a Scientific Project 2009
Laboratory TestsLaboratory Tests
19-04-2319-04-23 1414
Sea TestsSea TestsThe test was carried out in the “Tagus estuary” using the Academy’s sea training boats in mild weather conditions
European Excellence in a Scientific Project 2009European Excellence in a Scientific Project 2009
19-04-2319-04-23 1515European Excellence in a Scientific Project 2009European Excellence in a Scientific Project 2009
Sea TestsSea Tests
7.50 Km
19-04-2319-04-23 1616
At 7.49 km7.49 km, the signal has a level of -74 dBm -74 dBm for router 1router 1, and -75dBm -75dBm for the other.
European Excellence in a Scientific Project 2009European Excellence in a Scientific Project 2009
Sea TestsSea Tests
19-04-2319-04-23 1717
At 7.49 Km 7.49 Km throughput was 68 KBps 68 KBps (544 Kbps544 Kbps)
European Excellence in a Scientific Project 2009European Excellence in a Scientific Project 2009
SeaSea TestsTests
19-04-2319-04-23 1818
ConclusionsConclusions•This work highlights the potential of Wi-Fi technology in data transmission over long distances;
•Increasing transmission power, higher distances can easily be achieved;
•The available bandwidth at 7.49 Km allows the transmission of data but not of video.
European Excellence in a Scientific Project 2009European Excellence in a Scientific Project 2009
19-04-2319-04-23 1919
Test the system at high sea;
Construct a high-gain directional antenna for use on the monitoring ship;
Finally, a lot of work must still be done in analyzing the data collected by the sensors, and in optimizing the sensors and sensor layout.
European Excellence in a Scientific Project 2009European Excellence in a Scientific Project 2009
Future WorkFuture Work
Questions
19-04-2319-04-23 2020European Excellence in a Scientific Project 2009European Excellence in a Scientific Project 2009
The End
19-04-2319-04-23 2121European Excellence in a Scientific Project 2009European Excellence in a Scientific Project 2009