Thermal Detecting Wireless Sensor Network

Presenters: Joseph Roberson, Gautam Ankala, and Jessica CurryFaculty Advisor: Dr. Linda MilorECE 4007: Final Presentation

Georgia Institute of TechnologySchool of Electrical and Computer Engineering

December 2, 2008

Georgia Institute of Technology – Senior Design Project 2

Project Overview

Monitor continuously thermal activity in environmental areas such as wildlife and forests. Detect hazardous thermal conditions using Crossbow motes and onboard sensors

Final cost of one unit is $2500, which includes four wireless sensors, software, and programming board. Primary consumer is wildlife and forest agencies

Program motes with algorithm that efficiently routes data through wireless sensor network

Transmit real-time data wirelessly to computer base station for analysis and response to threatening conditions

Georgia Institute of Technology – Senior Design Project 3

Design Objectives

Monitor outdoor area up 10,000 square meters

Detect hazardous thermal activity with onboard heat sensors

Program with energy efficient algorithm

Wirelessly transfer data readings from sensors to computer

Provide a basic structure for research groups focused on energy efficient wireless networks

Georgia Institute of Technology – Senior Design Project

Proposed Network

Transceiver node– Communicate with PC– Receive information packet

from nodes– Transmit or receive data

Intermediate Nodes– Forward data to transceiver

node– Send information packets

periodically– Programmed with CSMA/CA

protocol

Georgia Institute of Technology – Senior Design Project 5

Proposed Versus Final Network

Transceiver Node– Does not sense environment– Connected to base station via

USB

Intermediate Node– CSMA/CA protocol not

implemented in sensor network– Wirelessly sends packets to

transceiver node based on timing interval

Georgia Institute of Technology – Senior Design Project 6

Code Programmed at Transceiver Node

TOSBase - <tos>/apps/TOSBase Sets up the communication between PC and nodes Receives data from intermediate node and forwards to PC

Intermediatenode

Transceivernode

(cluster head)

PC(base station)

radio USBTOSBaseMTS400

Georgia Institute of Technology – Senior Design Project 7

Code Programmed at Intermediate Nodes

MTS400 - <tos>/apps/MTS400 Broadcast data to the transceiver node Includes Temperature threshold component

– Returns TRUE: measured thermal intensity > threshold– Returns FALSE: measured thermal intensity < threshold

TransceiverNode

(TOSBase)

Temp

Intermediate Node(MTS400)

Base Station

Georgia Institute of Technology – Senior Design Project 8

Cygwin Console Cygwin is a collection of tools developed by Cygnus

Solutions which provides a command line and programming interface for the micas

XListen is a Cygwin C console program written in C that receives radio packets from the Mote and converts to engineering units

Georgia Institute of Technology – Senior Design Project 9

Moteview

Sensor 2Sensor 1

Cluster Head

Topology Chart

HeatTemperature

Georgia Institute of Technology – Senior Design Project 10

Acceptance Testing Received alert message when threshold reaches 40° C Verified sensor readings for multiple sensors Read data information in Moteview and Excel

Georgia Institute of Technology – Senior Design Project 11

Possible Future Improvements

Test larger sensor network

Create environment and test sensors

Implement CSMA/CA protocol

Determine cluster head automatically

Georgia Institute of Technology – Senior Design Project 12

Conclusion

Able to receive data for multiple sensors and receive alert messages once threshold is reached

For $2500, a good solution for homeowners and environmental areas

Good step towards future development in creating products for wildfire detection

Georgia Institute of Technology – Senior Design Project 13

Questions