Large range directive antennas for wireless sensor network J.P. CHANET, K.M. HOU, T. HUMBERT, P. RAMEAU, G. DE SOUSA, D. BOFFETY Cemagref - LIMOS Workshop.

Large range directive antennasfor wireless sensor network

J.P. CHANET, K.M. HOU, T. HUMBERT, P. RAMEAU, G. DE SOUSA, D. BOFFETY

Cemagref - LIMOS

Workshop on Wireless Sensor Networks Marrakech – June 2007

Workshop on Wireless Sensor Networks – Marrakech – June 2007

Outline

Introduction

Agri-environmental networks

Different types of antennas

Automatic control of directive antenna

Conclusion

Workshop on Wireless Sensor Networks – Marrakech – June 2007

Introduction: needs for agriculture

High regulation, economic and society constrains Food safety Quality label and certification Environment protection

Agriculture in network thanks to Internet Permanent exchange between the different industry players Growing request on product information and registration of

agricultural practices Need to collect data in large quantity

Automatic storage of data in real time and reliable Development of distributed databases between economic

players Improvement of equipment management

Development of embedded electronic devices (sensor, bus…)

Cost and sophistication growing

Need of automatic data acquisition

Workshop on Wireless Sensor Networks – Marrakech – June 2007

Introduction: needs for environment

Data collection for ing environmental indicators Multi scale indicators Areas not very accessible

Better management of natural resources Management of water resources Soil monitoring

Monitoring network for natural risk prevention Flood prevention Monitoring of dykes, barrages... Forest fire prevention Volcanos survey

Communication network in case of natural disaster Infrastructures destruction Needs for quickly operational solutions

Need of intelligent autonomous devices

Workshop on Wireless Sensor Networks – Marrakech – June 2007

Agri-environmental networks

Close relationship between agriculture and environment: Areas, actors, risks...

Need of flexible systems to be adapted to all applications

Two networks concept « Wireless Sensor Network » (WSN) « Mobile Ad Hoc NETwork » (MANET)

Workshop on Wireless Sensor Networks – Marrakech – June 2007

Networks with cluster

Workshop on Wireless Sensor Networks – Marrakech – June 2007

Node of agri-environmental network

+Asservissement()-Position

Antenne -Processeur-Flash-Sram-etc.

Matériel

+Thread()-Evenements

LIMOS

* 1

+FFCCC()+NIMBE()+Fct()

-MessagesCIVIC

1

1

LiveNode

1*

Workshop on Wireless Sensor Networks – Marrakech – June 2007

Different type of antennas

Omnidirectional antennas Radiate in all the direction

with the same energy

Directive antennas Radiate in one or two preferred direction

Omnidirectionnal

ParabolYagiPatch

Workshop on Wireless Sensor Networks – Marrakech – June 2007

Different ranges of antennas

Workshop on Wireless Sensor Networks – Marrakech – June 2007

Principle of automatic antennas

Workshop on Wireless Sensor Networks – Marrakech – June 2007

Flow chart

AP Antenna

Scan

SignalFound

FollowMobile

EndSession

YES

YES

NO

NO

Mobile Antenna

PointAP

NewSession

SendCoordinate

LinkOK

SendCoordinate

+ Data

EndSession

EndSession

End

YES

YES

YES

NO

NO

NO

Workshop on Wireless Sensor Networks – Marrakech – June 2007

Antennas realization

Audio Streaming without lost at 2 km (8km/s speed)

Workshop on Wireless Sensor Networks – Marrakech – June 2007

Example of an agri-environmental network

Workshop on Wireless Sensor Networks – Marrakech – June 2007

Conclusion

Development of long range directive antenna Use of low cost devices compatible with agri-

environmental context Different clusters of agri-environmental network

reachable Validation in a real farm

Development of new agri-environmental applications in European project NeTADDeD (FP6)

Integration of antennas for multi robots control

Workshop on Wireless Sensor Networks – Marrakech – June 2007

Thank for your attention