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DARSI II
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  1. Data Acquisition Real-Time System Integration DARSI II Preston Schipper Matt Hulse Adrienne Baile

  2. Data Acquisition • What is Data Acquisition? • Network of Sensors • Central Collection • Processing of Information • Output • Our Data Acquisition System: • Application: CU FSAE race car • Design: Challenges, Solutions • Teamwork & Group Schedule • Impacts and Feasibility of DARSI after the Capstone expo. • Examples of Data Acquisition: • Anti-Lock Brakes • Airplane Black Boxes • Industrial Manufacturing • Lab Experiements

  3. What is Formula SAE? • Collegiate Design Series • Group of diverse engineering disciplines • World Wide Competition • Why FSAE needs DARSI • Objectives of DARSI • Gather • Process • Store • Present • Control

  4. DARSI System Breakdown: Fall 2004

  5. DARSI versus DARSI II Fall 2004 Capstone Project: DARSI Spring 2006 Capstone Project: DARSI II • Fully functioning data acquisition microprocessor subsystems • Linear position & Hall-effect wheel sensors • SmartMedia memory logging • Automated CAN Bus network • MS Windows data viewing software • Hardware miniaturization; surface mount chips • CAN Bus expansion; ‘bus master’ module • Real-time information for driver; LCD module • Multi-sensor compatible modules • Enhanced PC software; analysis tools • Traction control; real-time analysis/control module

  6. DARSI II: Bus Master Module Current Bus Master: • Bus Master ‘Module’: • Code package • Installed on every DARSI microprocessor • Hardware enabled • PIC Microcontroller – PIC18F458 • Controller Area Network (CAN) • C Programmable • Polling Data / Unique Bus Traffic • Hardware settings control which module acts as bus master. CAN Bus Data Frame

  7. DARSI II: LCD Module LCD Module: CrystalFontz CFAG12864B-TMI-V

  8. DARSI II: Multi-Sensor Modules  OLD NEW • Multi-sensor Modules: • PIC Microcontroller – PIC18F258 • Fast – 40 MHz • Controller Area Network (CAN) • 10-bit A/D converter • C Programmable • Minimize space/weight/repetitive hardware

  9. DARSI II: Traction Control Module • Traction Control System • Monitor front and rear wheel speeds through data on the CAN bus to detect wheel spin • Communicate with the ECU by D/A to through CAN to limit engine power • Changeable control system parameters for varying surface conditions (rain, gravel, dry, etc)

  10. Design Constraints & Implementation Challenges • High Temperatures • Signal Noise • Signal Attenuation • Durability / Vibrations • Weather • Power Limitations • Packaging • Storage Versus Real-time • Time / Board Prototyping • Communication / Compatibility • Data Processing Speed • Signal Acquisition

  11. Details of Project Processors LCD Systems • Microchip – PIC18F258/458 • Fast – 40 MHz • Cost <$10 • Controller Area Network (CAN) • C Programmable • CrystalFontz CFAG12864B-TMI-V • 75.0 x 52.7 x 8.9mm • 60.0 x 32.6mm Viewing Area • Built-in Samsung controller KS0107/KS0108 • PCB Redesign • Surface mount hardware Traction Control • 034 Motorsports Stage IC Engine Control System

  12. Labor and Responsibilities • PCB Design (Adrienne) • Schematics • PCB Development and Population • Processor Coding (Matt & Preston) • Multi-sensor capabilities • Bus Master module • LCD Module • Traction Control System • New Module Prototyping (Matt & Adrienne) • Breadboarding • Testing • Traction Control ECU Interfacing (Preston)

  13. Schedule

  14. What's After Expo? • Economics and Marketability • Broad consumer market • Fully customizable • State of the art • Manufacturability and Sustainability • Pre-manufactured and replaceable sensors • Modularity allows for adaptation • Simple expansion capabilities

  15. Impacts • Environment • Emissions • Fuel Economy • Safety • Acquired information allows for determining safe operating limits • Driver feedback to warn of dangerous conditions • Traction control will decrease out of control vehicles • Society • Racers • Environmental • Applications in general consumer market

  16. Final Objective To design and construct improvements and expansions for the DARSI modular telemetric data acquisition system for automotive applications with a focus on the CU FSAE race car. Questions?