Transcript display
P11016: Intra-building Navigation Shannon Carswell Dan Paris Tim Garvin Dan Stanley Outline • • • • • • • • • Architecture and Process Diagrams Bill Of Materials Component Details Interfaces Software Information Electrical Information Test Plan Risk Assessment Feasibility Analysis Architecture Diagram Hand Held Device Compass Direction Power Supply RFID Reader Tag Number Microcontroller I/O INTERFACE (Computer) RFID TAG Process Diagram Get Target Destination (UI) UI Input Translate to Location UUID Tag UUID# Get current Location Tag UUID# Find Next Waypoint Tell User We’ve Arrived (UI) Yes There yet? No Build Map Manual Data Entry Map Give Directions (UI) Bill of Materials RFID Reader SkyeTek M9 Module (MH) – – – – – – – Frequency: 862-955MHz Size: 70x53x9 (mm) Weight: 12.5g Read Range: 3.5m Supply Voltage: 4.5-5.5V Price: $274.00 Tag Compatibility: EPC Gen1 & EPC Gen2 RFID Tags ALN-9654 “G” Inlay •Size: 3.8”x0.9” ALN-9634 “2x2” Inlay •Size: 1.76”x1.76” ALN-9662 “Short” Inlay •Size: 2.76”x0.67” ALN-9640 “Squiggle” Inlay •Size: 3.73”x0.32” ALN-9630 “Squiglette” Inlay •Size: 2.76”x0.37” RFID Antenna ANT-VDP-DB1-RPS • • • • • • • Frequency: 824-960MHz VSWR: <1.5 Impedance: 50 ohms Connector: SMA Polarization: Linear Size: 4”x0.8”x0.18” Cost: Free RFID Component Connection Microcontroller Dev Board: Explorer 18 •Maximum Flexibility •Debugging Support •Too large to strap to arm. •Enables confidence in later PCB •Comes with Superset representative of the PIC18 family. Microcontroller Interfaces Compass RFID Reader I2 C PIC18F8722 Microcontroller GPIO & PWM Keypad Tactile Response Etc. Microcontroller Pin-out Microcontroller: PIC18F8722 • “Head of the Family” • 5 PWM Outputs • I2C • Aggressively Low Power • Supports 5V Rail, down to 2V Compass • • • • • Freescale – MAG3110 3 Axis Magnetometer Low Power Draw 24uA at 0.95-3.6V Popular Consumer Electronics I2C Compatible Interface Miniature Size 2x2x0.8mm Maximum Measurement Frequency of 400Hz Microcontroller and Compass Interface • Both MC & Compass Support the Popular I2C Interface I2C Interface • 2 Wire Interface for Low Speed Consumer Electronics • Commonly Used to Attach Peripherals Components to Motherboard • Ideal for the Low Speed ADC on the MAG3110 Chip Navigation • ‘Hybrid’ Algorithm – Graph Traversal – Area Navigation A • Terminology – Tag – Area – Waypoint B C Navigation • ‘Hybrid’ Algorithm – Graph Traversal – Area Navigation A • Terminology – Tag – Area – Waypoint B C Power Supply Circuitry V1 2 C2 1u R1 1Meg R2 1Meg 0 V U2A 3 8 C1 .33u OUT V1 V+ V1 9Vdc IN 3 1 GND U1 LM7805C + OUT 2 - 1 V2 V 4 TLC277/101/TI V- 0 Power Supply Simulation 5.2V (323.478n,4.9967) 4.8V 4.4V 4.0V 3.6V 3.2V 2.8V (214.783n,2.4984) 2.4V 0s V(V1) 0.1us V(V2) 0.2us 0.3us 0.4us 0.5us 0.6us Time V1: 4.986 V V2: 2.498V 0.7us 0.8us 0.9us 1.0us Electrical Circuit for Compass Test Plan Objective: Verify communication between all components in RFID System • • • • • • Reader vs. Antenna Reader vs. Tags Read Range vs. Tags Reader vs. Micro Compass vs. Micro Power supply vs. RFID system • Computer vs. Micro Risk Assessment Changes Feasibility Analysis Dead Zone Solution Future Plans • MSD I – RFID Testing/ Feasibility Analysis – Read RFID Tag UID – Figure Out Wiring – PCB/Vector Board Considerations