Transcript ppt - Senior Design

TEAM THUMBSTART
Robert Rebich
Brandon Aldecoa
Anas Hussain
Sponsored by:
PROJECT BACKGROUND
New cars use keyless entry
 Bring bikes up with that trend
 Remove the need for keys, cards... etc.
 Biometrics are getting cheaper
 Fingerprints are the most reliable

PROJECT DEFINITION
Implement fingerprint scanner to be used for
ignition of a motorcycle
 Train multiple users
 Reliability
 Ability to withstand road conditions
 Security

PROJECT COSTS
Design Budget: ~$2000
 Keep total system cost under $150

Part
Atmel AVR pic
Suprema SFM3010-FC
Keypad
Relay
Cost
Order size
$2.50 1
$125.00 10-99
- $15 (aprox.) 1
RF transmitter
$5.00
RF receiver
$8.00
Antenna
$1.80 1,000
Voltage regulator
$0.78 1,000
TOP LEVEL BLOCK DIAGRAM
TRAINING SYSTEMS FLOW CHART
TRAINED USER FLOW DIAGRAM
VARIOUS SCANNERS
Stand alone scanner vs. embedded scanner
 Various types

 Optical
 Thermal
 Capacitive
 Electric
field
SFM3010-FC
Thermal Scanner
 3.3 V power input
 Scanner operative range (-40 to 85⁰C)
 Module operating range (0 to 70⁰C)
 Store 1900 Unique Finger Prints

ATMEL AVR
Currently working with ATmega48
 AVR series very similar: code easily ported
 Flexibility with memory, I/O, cost
 Operating voltage range (2.7V – 5.5V)

VOLTAGE REGULATION
12V DC from battery

3.3 V for scanner and AVR
Possible options

Zener diode voltage regulation

Off the shelf regulator
COMMUNICATION

Interfaces between AVR and scanner DSP
Toggling GPIO pins (on DSP)
 Serial communication

 RS422

or RS485
Commands

Send (AVR to DSP)
Suprema
DSP
 Enroll
 Identify
Success, Failure
 Delete

Receive (DSP to AVR)
 Succeed
 Fail
ATMEL AVR
Enroll, Identify, Delete
RADIO FREQUENCY IGNITION CONTROL

Use RF
Engage relay
 Start the bike


Ease installation
Replace starter relay
 Wirless: no problem because cable too short

Possible back up system
 Downside: Cost


Linx modules cost $8 to $10 per receiver and $5 to $7
per transmitter
BACK-UP SYSTEMS
Key fob (RF)
Keypad
Pros 

Wireless
Already using
RF for starter
relay

Cons 
Need to have
device with
you



Handle bar
combo
No hardware

to carry
Cheap, simple
Universal:
stock or
custom
extra piece of
hardware to
implement


Smart card
Bluetooth


Cheap

Small, light
Ubiquity of
Bluetooth
phones
Complicated 
to implement
Near
impossible to
implement
on a stock
bike
smart card 
required
Need cell
phone with
Bluetooth
capability
A diff.
transceiver
Licensing
expensive
No external
device
needed


TRAINING

Unique code with every unit
 inputs
code using the keypad
 begin
the enroll process
User trained: system ready for use
 New user: repeat enrolling

PACKAGING AND POSITIONING

Early stage

Decision about choice of AVR chip



Placing


Under seat
Keypad over the rest of the electronics


Number of I/O ports
Size of final program
Possibly removable
Packaged




Survive harsh environmental conditions
Easy to mount
Hidden scanner
Small size
ON GOING ISSUES

Length of the ribbon cable
 Currently
Suprema only has a two inch cable
 Would like to extend length to about 1ft
 Suprema doesn’t have longer cable
 Longer cable not recommend
 Communication issues with extended length

Heat tolerance of Suprema DSP chip
 Atmel
AVR chips and scanner have industrial temp.
ratings, Suprema DSP doesn’t
QUESTIONS OR COMMENTS?
THANK YOU