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DARSI 2 CDR
Data Acquisition & Real-time System Integration
Presentation Outline:
•Project Overview
•Components:
•Design
•Status
Adrienne Baile
Preston Schipper
Matt Hulse
•Administrative
DARSI: Project Overview
Data Processing
System
Sensors
Data Collection
Data Storage
Data Display
Traction Control
CAN Network
Where Are We Now?
Surface Mount Components
Traction Control
• Multi sensor ability added to
data collection boards
• Control system modeled
• Engine control revisited
• Surface mount PCB’s
in development
LCD
CAN Bus Master
• Wire-wrapped prototype
• CAN library packaged
• Functioning code
• Expanding data frame
capabilities
• Investigating off chip
memory configuration
Surface Mount
Data Storage Board
Multi-Sensor Board
Status: Shipping
Status: Shipping
• PIC18F458 TQFP for surface
mount
• Deutsch Weatherproof 4 pin PCB
connectors for CAN/Power
• Multiple sensor hook-ups
• Utilizing 3 more A/D conversion pins
on PIC18F258
• Deutsch Weatherproof 4 pin PCB
connectors for CAN/Power and 6 pin
PCB connector for all 4 sensors
Surface Mount Details
Final Dimensions:
Multi-Sensor Unit: 2” x 2”
Data Storage Unit: 2” x 4”
LCD Control Unit: 2.95” x 2.07”
LCD Module
Status: Prototype Board - Code Testing
• Real-time
display of
important data
traveling over
CAN bus to driver
• Menu interface
with screen
selections
• Current display
highlighted on
bottom
LCD Components
• Crystal Fontz LCD CFAG12864B-TMI-V
• PIC18F458 Microcontroller
• STMicroelectronics Serial Flash Storage
• Status: Components on Order
• Need ~5kB of storage
• M45PE20-VMN6P 2 Mbit Storage
• SPI serial communication supported by PIC
• Maxim MAX3002 bi-directional octal level
translator
LCD Code
Code Status:
Final Testing
LCD Memory Layout
LCD Code
Code Status:
Final Testing
LCD Timing
Traction Control System
Block Diagram
Status: Code Development
• Ducatti Motorcycle System Engineer
helping with control system model
• Block Diagram Control
Traction Control System
Control Scheme
• ECU Ignition Control
• FSAE Rule Conditions
• The rules specify that a purely mechanical throttle body must be
used for safety reasons
• A second throttle body can be used in series that is electronically
controlled using a stepper motor
Traction Control Code
• Determine Wheel Slip
• (rear rate / front rate) >= 1.03 is the starting point for wheel slip
• Stepper Controller
• When no wheel slip occurs keep stepper throttle open
• When slip occurs vary throttle based on calculated control
• Calculate Throttle Control and Ignition Timing Adjustment
• If slip occurs move stepper to mechanical throttle position
• Increment further closed based on the amount of wheel slip
• Introduce ignition timing changes based on car velocity
• This last piece will require lots of testing on the car to find
acceptable rates of throttle control
Bus Master Module
Status: Enhancing Code
Can Functions:
•breakdown
•enable_CAN_transmit
•disable_CAN_transmit
•configure_CAN_controller
•check_data_req
•request_send
•can_send
•can_receive
Features & Capability:
•No longer need main storage
module to regulate CAN functions
•No longer need central power
distribution
Ultimate Goal: CAN discovery and
dynamic build-up of sensor network
Fallback Goal: CAN bus master still
implement-able on any board
Parts List
Development Environment: Microchip MPLab IDE version 7.31
PICStart Plus! Programmer / ICSP Development Kit
Component Name
Miconcontroller
Microcontroller
LCD
Stepper Motor
CAN
Amplifiers
Inverter w/ Schmitt Trigger
Clock
Pentiometer
Voltage Regulator
4 pin receptacle
4 pin plug
6 pin receptacle
6 pin plug
Capacitors
100microCap
Resistors
Part
Package
TQFP
SOIC
Vendor
PIC18F458-I/SO
Microchip
PIC18F258-I/SO
Microchip
CFAG12864B-TMI-V
Crystalfontz
Size 17
With PCB Controller Iterinar Electronics
MCP2551-I/SN
SOIC
Microchip
LF356M
SOIC
National Semiconductor
SN74LS14D
SOIC
Texas Instuments
SM77M
Advanced Package Pletronics
EWV-YC8B14
Surface mount
Panasonic
MC7805CD2TR4 DDPak-3
ON Semiconductor
DTM04-4P
Deutsch
DTM06-4S
Deutsch
DTM04-6P
Deutsch
DTM06-6S
Deutsch
805
Capstone
HB Surface Mount Panasonic
Digikey
Labor & Responsibilities
Adrienne:
Matt:
Circuit Schematics
Software Development
PCB Designs
Multi Sensor Units
LCD Control Logic
Preston:
LCD Display Logic
Traction Control
CAN Bus Master
Milestone Goals
Milestone 1 Goals:
Milestone 2 Goals:
• Complete surface mount
PCB’s for data collection and
logger
• Creating LCD enclosure
• LCD – testing PCB and code
•TCS – attempt to install on
FSAE car
• Continuing to develop code
package
• CAN renovations in testing
• Complete data collection
and logger enclosures
• Final testing of TCS
• Finalize PC interface
• Complete CAN Update
Schedule: CDR  Expo
Thank you
Questions & Answers