P13015 Navigation Aid for Visually-Impaired/Blind

Michael Bova- Project LeadKevin Alderfer- Lead EngineerRyan Selig- EngineerSoham Chakraborty- EngineerP13015Navigation Aid for Visually-Impaired/BlindStructural Block Diagram

Functional Decomposition

Challenges Faced by Last IterationRFID Reader poorly documented & more difficult to implement than anticipatedInconsistent tag readingRFID Reader consumed too much powerMagnetometer interfacing (I2C)Routing algorithm implementationOur goals:Find a suitable replacement RFID Reader

Fully integrate/implement all components

Improve path finding/following algorithm

Reduce power consumptionFinding a new RFID ReaderMust have low operating voltage: = 1mBudget: $200Must have good documentation/supportPhysical sizeAlternative Reader OptionsCriteriaIDS (IC)CXJ-OEMSkyeTekSiritModelR903 CXJ-ZN-RR0017 SkyeModule M9INfinity 110Frequency840-960MHz860-960MHz862-955 MHz13.56 MHzRead Range N/A3-10m1 - 4 m~ 4 inchesSize (mm)7mm x 7mm x 0.9mm210x90x53mm70x53x9 mm35x35x4 mmSupply voltage 3.0-3.6V (2.7V limited functionality)2-4V(lithium battery) supply power adapter5 v3.3 VConnectionUART SerialUSB, RS232TTL, USB, SPI, I2CSerial TTLPrice(~$35) based on buying 1500US $ 150 - 500 / Piece$80US $149.00 (Tags: +$100)Best Reader OptionsCriteriaSkyeTekVEEYEEThingMagicModelSkyeModule M10VEEYEE-399XMercury e5-CompactFrequency860-960 MHz902-928 MHz902-928 MHzRead Range~5m1-6 m1-4 mSize (mm)42.8x76.5x11.2 mm90x49x0.51 mm56x36x5 mmSupply voltage 3.3V3.3 - 5 V3.3 VConnectionUSB, RS232UARTSerialPriceUS $497US $172 (+$21 shipping)US $1500 Dev Kit ($300 reader)Working Software ComponentsKeypad inputAccepts input and verifies destinationMotor pulse width modulation2/3 workRFID Reader sporadically reads tagsPath finding algorithm works correctlyRoom for improvement

Path Finding Algorithm

Path Following Algorithm

Major RisksPoor choice of RFID ReaderSteep learning curve for I2C/other interfacing protocolDamaged hardware componentsDelay in part deliveryPoor team communicationGroup member drops the courseTask ManagementZoho project management website:

https://projects.zoho.com/portal/ritp13015#todomilestones/499387000000013021