Team 5Team 5Small, Lightweight Speed and Small, Lightweight Speed and Distance Sensor for Distance Sensor for

Skiers & SnowboardersSkiers & Snowboarders

Kunal VermaManager

Justin ErskineWebmaster

Temika CagePresentation Coordinator

Tim RossDocument Coordinator

Ben GuildLaboratory Coordinator

Contact: Dr. Stephen W. Schneider

Dr. Shanker BalasubramaniamFacilitator

Introduction

Project GoalsProject Goals

Create a device with the following features:Create a device with the following features:Speed, Distance, and Time Recording Speed, Distance, and Time Recording User-FriendlyUser-FriendlySafe/Robust DesignSafe/Robust DesignInexpensiveInexpensiveLong Battery LifeLong Battery LifeEasy Data RetrievalEasy Data RetrievalPreferred: Doppler RadarPreferred: Doppler Radar

Doppler RadarDoppler Radar

Signal is sent out at a fixed frequencySignal is sent out at a fixed frequencyReceived signal has a shifted frequency from Received signal has a shifted frequency from the reflectionthe reflectionCalculate speed usingCalculate speed usingfrequency deviationfrequency deviation

Design SpecificationsDesign SpecificationsOur design has several requirements that must be met:Our design has several requirements that must be met:

Measurements Measurements (minimum one minute intervals)(minimum one minute intervals)Average speedAverage speedMax SpeedMax SpeedDistance TravelledDistance Travelled

SafetySafetyLightweight (< 2 lbs.)Lightweight (< 2 lbs.)Disabled display during recordingDisabled display during recordingWeather resistanceWeather resistanceLow temperature operation (-10F)Low temperature operation (-10F)

Power and EfficiencyPower and EfficiencyAuto-off after 10 minutes of operationAuto-off after 10 minutes of operationAt least 2 hours of battery lifeAt least 2 hours of battery life

OperationOperationData storage requirement for at least 10 minutes of run dataData storage requirement for at least 10 minutes of run dataData report on LCD or data export to external device Data report on LCD or data export to external device

Final DesignFinal DesignRadar DeviceRadar Device

Sends and receives EM waves off the groundSends and receives EM waves off the groundProduces output voltage dependent upon frequency shift in the Produces output voltage dependent upon frequency shift in the returning wavereturning wavePrefabricated Doppler radar module (easy to replace)Prefabricated Doppler radar module (easy to replace)

Control SystemControl SystemMicroprocessor (PIC) based implementationMicroprocessor (PIC) based implementationHandles interaction with the user interfaceHandles interaction with the user interfacePerforms calculations and storage of data from radar devicePerforms calculations and storage of data from radar device

User InterfaceUser InterfaceWill consist of an LCD display and controls Will consist of an LCD display and controls Layout will allow for easy manipulation of controls and high visibilityLayout will allow for easy manipulation of controls and high visibility

Block DiagramBlock Diagram

Microcontroller

Control

Device Display

Speed Sensor Module

Tx Rx

InternalEEPROM

Frequency to Voltage Converter

Control

Control

Final PrototypeFinal Prototype

Achieved Design SpecsMeasurements Measurements (minimum one minute intervals)(minimum one minute intervals)

Average speedAverage speedMax SpeedMax SpeedDistance TravelledDistance Travelled

SafetySafetyLightweight (< 2 lbs.)Lightweight (< 2 lbs.)Disabled display during recordingDisabled display during recording

Power and EfficiencyPower and EfficiencyAt least 2 hours of battery lifeAt least 2 hours of battery life

OperationOperationData storage requirement for at least 10 minutes of run dataData storage requirement for at least 10 minutes of run dataData report on LCD or data export to external device Data report on LCD or data export to external device

Unachieved Design Specs

Auto LCD ShutoffWeather-resistant

Temperature - Untested

How It Works

Simple Menu SystemStart RunRecorded RunsDelete RunsSettings

Start RunShuts off LCD and waits for user to being movingRecords Run Speeds throughout runAt end of Run, stores Run data

Recorded RunsAccess old runsStores up to 20 runs

Additional featuresLCD Screen shuts down on user movementAdjustable Contrast on LCD Screen

How It Works

BudgetBudget Final Cost Breakdown

Item Price Our Costs Production Cost

PIC $6.32 $0.00 $3.95

Battery $10.88 $10.88 $7.61

Switch $1.17 $1.17 $1.17

Large Project Box $3.69 $3.69 $3.69

Small Project Box $2.29 $2.29 $2.29

Printed Circuit Boards $3.98 $3.98 $3.98

LCD $33.00 $0.00 $25.00

Doppler Module $15.00 $15.00 $15.00

LM324N $0.46 $0.00 $0.29

LM2907 $2.02 $2.02 $1.46

LM7805 $0.60 $0.00 $0.38

MX045 $3.35 $0.00 $1.91

Capacitors (x5) $0.10 $0.00 $0.10

Inductors (x2) $1.80 $0.00 $1.80

Resistors (x14) $0.98 $0.00 $0.98

Phono Jack Set (x2) $0.60 $0.60 $0.60

Savings $16.03

Total $86.24 $39.63 $70.21

Final ResultsFinal Results

Future Design ImprovementsExternal EEPROMMore powerful Doppler ModuleDevice Structure

Wireless Communication -or-

One component

USB Connection

Questions?Questions?