TIU Tracking SystemSponsor IntelAdvisor Prof. Robert DaaschTeam Daniel Ferguson

Man HoangLynh PhamTri TruongDung Le

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Introduction

• Problem statement• Key requirements

Size Power Accuracy

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Agenda

• System Overview• Hardware• Firmware• Software• Deployment• Results• Conclusions

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System Overview

Controller+

Location Engine(s)

Detector

Users

Admin

Web App

Tag

Front-endBack-end

Proxy

Database

Wi-Fi

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Agenda

• System Overview• Hardware• Firmware• Software• Deployment• Results• Conclusions

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Hardware

• Deviceso Tago Detectoro Proxy

• Componentso RF12 transceivero ATmega328p MCUo WiFly 802.11b/g transceiver

• Schematic and layout by Eagle CAD• PCB by Sunstone Circuits

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Hardware

• Tago RF12 transceivero ATmega328p MCUo Size: 1” x 1” x 1”o 240mAh coin cell battery

Product

Layout

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Hardware

• Detectoro RF12 transceivero ATmega328p MCUo Status LEDo Size: 3.5” x 1”

Product

Layout

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Hardware

• Proxyo RF12 transceivero ATmega328p MCUo WiFly 802.11b/g transceivero Breadboard prototypeo Ceramic antenna

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Agenda

• System Overview• Hardware• Firmware• Software• Deployment• Results• Conclusions

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Firmware

• Tag broadcasts• Detectors relay• Proxy forwards to Controller

Detector

Tag

Front-end

Proxy

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Firmware

• Tago Mostly in low power stateo Periodically wakes up to broadcast

• Detectoro Listen for messages from tags and other detectorso Controlled floodingo Collision avoidance via time division

• Proxyo Listens for messages from detectorso Forwards messages to Controller

• Generallyo All speak a common message format which includes

Battery Information Infrastructure for a more sophisticated routing protocol Fixed length

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Agenda

• System Overview• Hardware• Firmware• Software• Deployment• Results• Conclusions

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Software

Controller+

Location Engine(s)

Web App

Back-end

ProxyMySQL Database

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Software

• Controllero Collects data from Proxyo Feed data to Location Engineo Two operating modes

Calibrating Collects RF signatures at calibration points Stores calibration data in a local database

Locating Passes calibration data to Location Engine Collects and sorts data into packets Feeds the packets to Location Engine Stores results in MySQL Database

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Software

Location Engine

• Theoryo Each location has a

unique & consistent RSSI pattern

o Euclidean distance

• Reduce aliasing byo Referencing the nearest

detectoro Interpolating between

two closest locations

Fingerprint Matching Algorithm

Input Filter

Output Filter

Calibration Data

RSSI Data Tag’s Location

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Software

• Web Appo Functionalities

Visualize tags’ and detectors’ locations Add, modify, and remove tags and detectors Configure the tracking area

o Design Goals Fast Simple Easy to use

o Technologies PHP HTML5, CSS3, JavaScript

o Why Web?

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Software

• Key points

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Agenda

• System Overview• Hardware• Firmware• Software• Deployment• Results• Conclusions

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Deployment

• Detector placement• Calibration density• Each tag has a unique ID with respect to other tags• Each detector has a unique ID with respect to other

detectors• Proxy possible configurations

o Proxy must have access to LANo Proxy must create an Ad-Hoc Access point for Controller to

connect to

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Deployment

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Agenda

• System Overview• Hardware• Firmware• Software• Deployment• Results• Conclusions

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Results

• Size: 1” x 1” x 1”

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Results

• Powero 240mAh coin cell batteryo 30mA transmit currento 40µA sleep currento 1sec broadcast intervalo 3ms transmit windowo 0.3% duty cycle

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Results

• Accuracyo Average 2mo Less than 1m at calibration points

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Agenda

• System Overview• Hardware• Firmware• Software• Deployment• Results• Conclusions

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Conclusions

• Antenna design• More testing

o Calibration densityo Detector placement

• Improve testability• Different algorithms• Environment & signal strength

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Acknowledgement

• Professor Robert Daasch• Alfonso Pereira & Sameer Ruiwale