Track User Tracker T.U.T.

Chris OrchardFevri Tokouete

Michael Tullbane

Group 2 Senior Design Fall 2011

The TUT

A complete system used to “prescribe” and record exercise regimens pertaining to an indoor athletic track.

Transmitter

Radiation Patterns

Track Section Track Section

WBT

Distance error

Distanceerror

Doctor

Internet

Patient (at physical therapy)

Patient (at home)

Communication with WBT via

VCP

Configuration of Transmitter

Nodes via VCP

Project OverviewHardware:Record and display a user’s performance during a track session.Loaded with an individual’s prescribed exercise regimen or desired goal(s).Prompts user during session, I.E. slow down, speed up, rest.Displays and/or records speed, distance, elapsed time, and time/distance remaining.Interface to upload recorded sessions.

Project Overview

USB Interface to Hardware

Auxiliary Interface to Hardware

Doctor

Internet

Patient (at physical therapy)

Patient (at home)

Communication with WBT via

VCP

Configuration of Transmitter

Nodes via VCP

Software:Allows health care professionals to prescribe and monitor exercise regimens via a website for their patients.Permits self-prescribed use of the system.Maintains a private exercise diary accessible by both prescribers and users.

System Use Flow

User LoginHost computer

(At track facility)

Host Retrieves Prescription Data

from Website

Prescription downloads via USB to portable electronics

device(Wrist Band Tracker WBT)

WBT detaches from USB

Issued to user

WBT records session.

Prompts user to meet prescription

goals.

End of session.WBT reattached

to host.Session data

uploaded

User Exercise Diary in

database updated

Hardware Components

Narrowly focused signal

Tx

Tx

Tx

Tx

Tx

TxTx

Tx

Transmitter

Direction of travel

User wearing WBT

WBT-Wrist Band Track Large wrist watch sized device. Determines speed and distance by

detecting transitions through E field thresholds of a transmitter node.

Records and displays session data. Displays new data only when new data

is acquired.

Transmitter Nodes Provides a narrow beam RF

signal used by the WBT to determine position and speed data.

Designed for ease of installation. Self powered, wireless, position placement flexible.

Overhead View of Indoor Track-Distance around 0.8 miles

WBT Simplified Block Diagram

SPI/USB

MSP430F2274 µController

CC2500 Transceiver

2.4GHZ Quasi-

SimpliTI©Network

B USCSPI

Master Mode

GPIO Port 4SPI AddressingControl

OLED Graphics Display

96xRGBx64

A USCSPI-ModeUART-Mode

Timer A1 SecondInterrupt

32.768KHzWatch Crystal

FT232RQ

Mini-USBconnector

GPIO Port 1Switch Input

GPIO Port 2

4 UserInput

Switches

Interrupt

Control Signal

Serial Data

WBT Design FeaturesTexas Instruments MSP430F2274 µcontroller 2 serial controllers used as SPI (One

reconfigured as UART for a USB interface. Timer A-Generated from external 32.768KHz

crystal.

32k bytes of Flash – bitmaps for the display. 1k bytes of SRAM.

T.I. CC2500 Radio IC ZigBee Protocol-2.4GHz.

Crystalfontz OLED Display Low power consumption 160 º view angle 96xRGBx64 dot resolution. GDDRAM-96x16x64 ⇒ 64k color spectrum

WBT Prototype Schematic

TRANSMITTER NODE

BASIC FUNCTIONS OF THE TRANSMITTER NODE

- Transmit reference signal to the WBT - Shut down the system at the end of the day- Be able to transmit signal within 160

meters range

BLOCK DIAGRAM OF THE TRANSMITTER

COMPONENTS OF THE TRANSMITTER

PATCH ANTENNABASIC FUNCTIONS: Transmit

signal to the WBT FEATURES- 2.4 GHz frequency- Low cost- High gain (10db)- very narrow bandwidth- small size (~4 cubic

inches)- superior performance

PATCH ANTENNA

Power received (Pr) using the Friis transmission equation

Pr = Pt*Gt*Gr*[1/(4*П*(R/λ))]^2

Pt = 1.3mW

Gt = Patch antenna’s gain= 10dBi

Gr = 0.5dBi = receiver’s antenna gain

R = Range = 2 meters λ = 3*10^8/ 2.4*10^9 λ = 12.5 Cm = 0.125

meters = transmitter’s antenna wavelength

Pr = 36uW

PATCH ANTENNA’S RADIATION PATERN

RF TRANSCEIVER (CC2500)

BASIC FUNCTION: Transmits signal to WBT via the patch antenna

Reasons for choosing the CC2500

- Low supply voltage - 2.4 GHz frequency - Short range - Ultra low power

1.3mW - Low cost - Free sample available

with Texas Instruments

RF TRANSCEIVER SCHEMATIC

MICROCONTROLLER (MSP430F2274)

MAIN FUNCTION: program transmitter in saving power mode, transmit signal to the WBT, and monitors the supply voltage.

FEATURES: - LOW SUPPLY VOLTAGE 1.8

to 3.6 V - Ultra-Low power

consumption- Two-built-in 16- bit timer- 1 SPI- 40 I/O pins- 10 bits A/D converter with

data transfer controller

TRANSMITTER NODE SCHEMATICS

Software System Design

• Commercial off the shelf (COTS) packages available?• Medical records systems• Web hosting services• Commercial database systems

• Write our own software• Software lifecycle model• Operating System• Language / Languages• Development tools

Software Lifecycle Model•Waterfall Model? - Inflexible to changing requirements ↓•Agile Methods? – Flexible, minimal documentation, too much consultation with customer, rush to final product ↓•Prototyping Model? – Produce prototypes at different stages to verify functionality and revise as necessary ↑

TUThost Software Design

• GUI capability, previous experience with the language, ability to interface with the other TUT software subsystems

• “C” – Have the most programming experience in “C”– “C” is very fast and efficient, but it is not a good language for designing

a GUI ↓• “C++”

– Versatile language with object oriented programming capabilities– Good set of graphical development libraries available– Do not have experience in graphical programming with “C++” ↓

• “Java”– Have quite a bit of experience in Java– Very well suited for graphical development– Many tools available for GUI programming in Java which would reduce

the development time for producing a functional prototype. ↑

TUT Login Screen

Patient Main GUI

Patient Email Exercise Log

Casual User Main GUI

Casual Email Exercise Log

Admin Main GUI

Add New Casual User

TUT Database Design

• Firebird– Free, Stable, Supports SQL, Scalable– Support for languages such as C/C++, PHP, and Python, but the current

release does not support access from Java. ↓• PostGreSQL

– Free and open-source, Supports SQL, Scalable with extra features such as support for creating your own custom data types.

– It has been around longer than Firebird, but also does not natively support access from Java. ↓

• MySQL– Commercial and Free versions– Many free development tools available from MySQL– Free graphical database management suite called MySQL Workbench

that is available from the MySQL website and was written by MySQL AB.– Native support for access from Java– Support for multi-user access, web-server access with PHP and Python– Known as one of the most popular open-source databases ↑

TUT Database

Web Server Design Considerations• Apache

– Most used free web server software– Free with an extensive set of software packages– No previous programming experience– Many extra features that we do not need for our system ↓

• Django + Python– Python is an interpreted language and it supports object oriented programming– One of the goals of the Python language is rapid development and deployment which makes

it very suitable for our prototype development– Django works with Python to quickly design and implement a complex web server using

native Python code– Web server development with Django focuses on a database driven design which is perfect

for our prototype since database access will be the primary function of our TUT web site ↓• Information Interchange Service (IIS)

– The next most used free web server software– Included with newer windows server packages as well as XP Pro service pack 2, Vista, and

Windows 7– IIS has many advantages over Apache in that it is easily integrated with other Microsoft

products– Highly scalable and would be a very good option for a future commercial release of the TUT

system– Quicker and easier to use than Django / Python -> We will use IIS ↑

Physician Main GUI

Add New Patient

Write Prescription

Budget

Cost Summary

Item Description Costs

Development Costs $177.95

WBT Prototype $120.00

2 Transmitter Nodes $220.00

Administrative-Shipping-Coffee $75.00

Total $592.95

• Initial budget estimate was $200 per team member• Each team member itemized their costs• So far we are still below budget

Questions?