Data AcquisitionReal-Time System Integration

Preston SchipperMatt Hulse

Adrienne Baile

DARSI II

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

Data Acquisition

• Collegiate Design Series

• Group of diverse engineering disciplines

• World Wide Competition

• Why FSAE needs DARSI

Objectives of DARSI• Gather

• Process

• Store

• Present

• Control

What is Formula SAE?

DARSI System Breakdown: Fall 2004

DARSI versus DARSI II

Fall 2004 Capstone Project: DARSI

• Fully functioning data acquisition microprocessor subsystems

• Linear position & Hall-effect wheel sensors

• SmartMedia memory logging

• Automated CAN Bus network

• MS Windows data viewing software

Spring 2006 Capstone Project: DARSI II

• 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

DARSI II: Bus Master Module

• PIC Microcontroller – PIC18F458

• Controller Area Network (CAN)

• C Programmable

• Polling Data / Unique Bus Traffic

Current Bus Master:

CAN Bus Data Frame

Bus Master ‘Module’:

• Code package

• Installed on every DARSI microprocessor

• Hardware enabled

Hardware settings control which module acts as bus master.

DARSI II: LCD Module

LCD Module:

CrystalFontz CFAG12864B-TMI-V

DARSI II: Multi-Sensor Modules

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

OLD 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)

• 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

Design Constraints & Implementation Challenges

Processors LCD Systems

PCB Redesign

• Surface mount hardware

Traction Control

• 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

• 034 Motorsports Stage IC Engine Control System

Details of Project

•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)

Labor and Responsibilities

Schedule

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

What's After Expo?

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

Impacts

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?

Final Objective