Data Acquisition
Real-Time System Integration
DARSI II
Preston Schipper
Matt Hulse
Adrienne Baile
Data Acquisition
What is Data Acquisition?
• Network of Sensors
• Central Collection
• Processing of Information
Our Data Acquisition System:
• Output
• Application: CU FSAE race car
• Design: Challenges, Solutions
• Teamwork & Group Schedule
Examples of Data Acquisition:
• Anti-Lock Brakes
• Airplane Black Boxes
• Industrial Manufacturing
• Lab Experiements
• Impacts and Feasibility of DARSI
after the Capstone expo.
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
DARSI System Breakdown: Fall 2004
DARSI versus DARSI II
Fall 2004 Capstone Project: DARSI
Spring 2006 Capstone Project: DARSI II
• Fully functioning data acquisition
microprocessor subsystems
• Hardware miniaturization; surface
mount chips
• Linear position & Hall-effect
wheel sensors
• CAN Bus expansion; ‘bus master’
module
• SmartMedia memory logging
• Real-time information for driver;
LCD module
• Automated CAN Bus network
• MS Windows data viewing
software
• Multi-sensor compatible modules
• Enhanced PC software; analysis
tools
• Traction control; real-time
analysis/control module
DARSI II: Bus Master Module
Current Bus Master:
• PIC Microcontroller –
PIC18F458
• Controller Area Network (CAN)
• C Programmable
• Polling Data / Unique Bus
Traffic
Bus Master ‘Module’:
• Code package
• Installed on every DARSI
microprocessor
• Hardware enabled
Hardware settings control which module acts as bus master.
CAN Bus Data Frame
DARSI II: LCD Module
LCD Module:
CrystalFontz CFAG12864B-TMI-V
DARSI II: Multi-Sensor Modules

OLD
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
NEW
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)
Design Constraints & Implementation Challenges
• High Temperatures
• Signal Noise
• Storage Versus Real-time
• Signal Attenuation
• Time / Board Prototyping
• Durability / Vibrations
• Communication / Compatibility
• Weather
• Data Processing Speed
• Power Limitations
• Signal Acquisition
• Packaging
Details of Project
Processors
LCD Systems
• Microchip – PIC18F258/458
• CrystalFontz CFAG12864B-TMI-V
• Fast – 40 MHz
• 75.0 x 52.7 x 8.9mm
• Cost <$10
• 60.0 x 32.6mm Viewing Area
• Controller Area Network (CAN)
• Built-in Samsung controller
KS0107/KS0108
• C Programmable
PCB Redesign
Traction Control
• Surface mount hardware
• 034 Motorsports Stage IC
Engine Control System
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)
Schedule
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
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
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?