design of multi-channel and distributed wireless communication network in under water vehicle

7/30/2019 Design of Multi-Channel and Distributed Wireless Communication Network in under water vehicle

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Design of Multi-channel and Distributed WirelessCommunication Network

Architecture for UUVs

MANISH SIR

Design of Multi-channel and Distributed WirelessCommunication Network

Architecture for UUVs

MANISHA


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A high speed AUV test platformAquabot

?? QUERIES

UUVs :- Unmanned underwater vehicles

Multi channel Communication

Distributed Wireless Communication

Compact Antenna
http://users.etown.edu/w/wunderjt/ITALY_2009/REPORTandPHOTO_steveHendersonAQUABOT_SUBMITTED.pdfhttp://users.etown.edu/w/wunderjt/ITALY_2009/REPORTandPHOTO_steveHendersonAQUABOT_SUBMITTED.pdfhttp://users.etown.edu/w/wunderjt/ITALY_2009/REPORTandPHOTO_steveHendersonAQUABOT_SUBMITTED.pdf


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Unmanned Underwater Vehicles

Nereuswill be the first autonomousvehicle to visit the 11,000m (36,089ft)

Challenger Deep in the Pacific Ocean.

UUV :- Unmanned underwater vehicles (UUV)

Vehicle operating Underwater without any hman

occupant.

Mainly Two Types :-Remotely operated

underwater vehicles (ROVs), :controlled by aremote human operator,

Autonomous underwater vehicles (AUVs), which

operate independently of direct human input..


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nose cone,

a payload modulea tail section containing the

communication devices, navigation

sensors,emergency systems and the

propulsion system.

VEHICLE STRUCTURE


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COMMUNICATION SYSTEM

RF and acoustic modem data provide a

complete communications package.

A wireless LAN communication subsystem is

included in addition to the standard RFmodem to provide a higher bandwidth link infavorable Conditions

.

MULTICHANNEL :- underwatercommunication, surface communication and

internal communication


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Communication System

Underwater communication is acoustic

modem, and the surface communication

consists of RF, Wi-Fi, BeiDou( Special

constellation of 4 geostationary 3 working + 1

backup used for regional navigation system).

Internal communication portal is TCP/UDP


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NEED OF MULTICHANNEL COMMUNICATION

UUV Functionality includes environmental explorations,

path planning, sea investigation, war strategies whichrequires communication underwater between other UUVS,

remote sensors, surface communication to control station

as well as internal integrated communication to dedicated

task unit Reliable communication channel for implementing

missions, emergency protection, state monitoring and data

downloading


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NEED OF DISTRIBUTEDCOMMUNICATION SYSTEM

Communication requirement for a high

integrated intelligent and autonomous control

system, each task unit communication witheach other as well as communication center

Collection and processing of data at a high

speed.


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GENERAL ARCHITECTURE OF UUVS

DISTRIBUTED COMMUNICATION NETWORK


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STRUCTURE OF MULTICHANNEL

COMMUNICATION

UNDERWATER COMMUNICATION

MODE :- Acoustic Communication

Medium acoustic sound pressure waves

Transducer physically immersed in

water(hydrophones)

Modem Used :-AM300

Frequency Band :- 8-16 kHz


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SURFACE COMMUNICATION

Three modes

:- Radio Frequency

:- Satellite Communication

:- Wireless Fidelity Communication (Wi Fi)

STRUCTURE OF MULTICHANNELCOMMUNICATION


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Rate Of Oscillation :- 30kHz to 300 GHz

Frequency dependency on Distance

General communication distance is 10 km butsuitability has been ensured up to 12 KM.

Frequency BAND 250 MHZ 260 MHZ

TYPE ND250A Full Duplex Communication ensures reliability

STRUCTURE OF MULTICHANNEL COMMUNICATION(RF Coomunication)


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STRUCTURE OF MULTICHANNEL COMMUNICATION

(Satellite Communication)

Used for Long range above watercommunication where RF fails due to low SNR

Comparatively Satellite Communication had

advantage of large coverage, furthercommunication distance, great informationtransfer capacity and high quality.

Technology utilised Inmarsat C, Globastat etc.Recntly developed :-

Chinese BeiDou System


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(Satellite Communication : BeiDou)

Also known as compass Navigation Satellite

Communication system is a dedicated satellite

communication system for navigation purpose

by Chinese

Beidou1 and Beidou2 are 2 phases of

developmenet


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Consists of four satellites (three working satellitesand one backup satellite).

Unlike the American GPS, Russian GLONASS, andEuropean Galileo systems, which use mediumEarth orbit(MEO) satellites, BeiDou-1 usessatellites in geostationary orbit(GEO).

No Requirement of constellation of satellites, butit also limits the The area that can be serviced isfrom Logitude 70E to 140E, and from Latitude5N to 55N.

Beidou 2 is a global Navigation system withhigher no of satellites


(Satellite Communication : BeiDou)


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(WI FI Communication)

Required for communication of UUV atStation/base center

For Program updating, mass data transfer and

download of information. Range is 300-500 M

A type of WLAN communication using 802.11and 802.11b standards.

Created by Wi-Fi Alliance company.

2.4 GHz Frequency standard.

HOW IS THIS MULTICHANNEL


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COMMUNICATION POSSIBLE?

Compact , anti pressure and water tight integratedantenna

Support all four modes of reception and transmission

The key in design of 4 in 1 antenna is keeping eachSub-antennas orientation and gain higher

Directivity governed by F(,) =E(,)/E(max) whereF(,) is the direction of normalised field, E(,)

radiated field ,E(max) is the max value of E(,) Gain G(dBi) = 10 log (2L/o) where L = antanna

length and o = working wavelength


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COMMUNICATION POSSIBLE? For maintaining of the antenna high above the

water surface whenever above water antenna

elevating mechanism is adopted


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INNER COMMUNICATION NETWORK

OF UUV

Internal Communication is through computers

using Ethernet, through distributed control

system .

TCP/UDP protocols are employed

Sensors communicate through serial port

communication.


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CONCLUSION

UUVS REQUIRE A MULTILAYER EFFECTIVEDISTRIBUTED COMMUNICATION FOR

RELIABILITY AND FUNCTIONALITY

UNDERWATER COMMUNICTION, INTERNALAND SURFACE COMMUNICATION IS THROUGH

ACOUSTIC, ETHERNET/SERIAL AND

rf,SATELLITE AND WIFI RESPECTIVELY.

RANGES ARE RF- 12, ACOUSTIC 11.2 WIFI

300-500 M


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E l tiUUV N


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Image and excerpt from: http://news.bbc.co.uk/2/hi/science/nature/8035499.stm

ExplorationUUVNereus

UUV N E l ti
http://news.bbc.co.uk/2/hi/science/nature/8035499.stmhttp://news.bbc.co.uk/2/hi/science/nature/8035499.stm


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UUVNereus

VIDEO htt // id l / id d t il/ b ill d t t h /626778029

Exploration
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design of multi-channel and distributed wireless communication network in under water vehicle

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