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?