Ed-Co Vision: To produce a product which is both fun and useful To rule the world Members: Scott...
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Transcript of Ed-Co Vision: To produce a product which is both fun and useful To rule the world Members: Scott...
Ed-Co
Vision: To produce a product which is both fun and useful To rule the world
Members:Scott Ferrell – Sensors and CommunicationsJeremy Griffin – MCU and GUIAric Kalynchuk – Software Development and ResearchDaisuke Kubo – Power and MCUChad Shaffer – CommunicationsBrent Thompson – Sensors and MCU
Overview
System Concept and Components Background and Market Research System Descriptions
Control Radio Frequency (RF) Direction Finding Communications and Graphical User Interface
Cost and Schedule Project Future
System Components
Extremely mobile user interface Personal digital assistant Nintendo Game Boy
Radio Frequency Beacon Mobile RF signal generator
Small autonomous car Modified remote controlled car with a
microcontroller unit and sensors
System Concept
A mobile controller transmits drive parameters to vehicle
The mobile controller receives sensed data from vehicle
Two modes of vehicle operation Vehicle can track a RF beacon Vehicle can follow waypoints
Mode Concepts and Reasons
Track Will locate and follow a RF beacon To show all of our skills
Point to Point For vehicle testing Allows for future scalability
Market ResearchCompeting Technology
Remote car and sensor platforms being researched from MIT to high school students
Most projects do not provide tracking/sensing technology that is integrable or upgradeable with current market technology
← Computer controlled racing, based on
pre-programmable behavior.
Computer controlled sensor
platforms. →
Market ResearchLargest Markets
Safety “after an accident, the violations that frequently top the list are
failures to keep pathways clear, floors clean, and emergency exits freely accessible”
- Jan Schut, www.plasticstechnology.com
Scientific Research The Hawaiian Volcano Observatory (H.V.O.) is a good example
of an organization that regularly monitors and studies volcanic activity
Entertainment Sam’s Club is selling twenty-four different types of RC monster
trucks this holiday season…Smart Track is the natural integration of technology that Sharper Image and Radio Shack customers already use and are willing to buy
System Overview
RF beacon Vehicle
RF receiver Vehicle controls Wireless comm.
Base station Graphical user
interface (GUI)
Beacon
Transmission Signal Originator
RF Transmitter
Base Station
Vehicle
User Interface
Output Screen and Logs
Input Buttons
IEEE802.11b Transceiver
IEEE802.11b Transceiver
Primary Vehicle Control
Motor Control
Motor
Turning Control
Turning Servo
Beacon Location Processing
RF Receiver
RF Transmission
IEEE802.11b Wireless Connection
RF Direction Finding
Horn antenna gain pattern consists of a single beam with minimal sidelobes
Allows for a very simple RF direction finding algorithm Measure received
power from both antennas
Turn in direction of antenna with greater received power
RF Beacon
Horn 1
Horn 2
Vehicle Speed Control
Speed Demand Determined based on the distance to the beacon
Motor Speed Controlled by switching the motor supply “on” and “off” very
quickly Responds only to the average effect
Longer “on” – speed increase Longer “off” – speed decrease
Speed Demand
PWM generator MOTOR
Rotor position detectorSpeed feedback
Drive circuit loads
Vehicle Direction Control
Turn Demand Determined based on position with respect to the beacon
Turning Control Two servo motors on the front wheels control the direction Pulse width modulation (PWM) determines the angle of
rotation of the motor Longer pulse – motor turns more Shorter pulse – motor turns less
Turn Demand PWM generatorTurning Servo
Rotor position detectorTurn feedback
Drive circuit loads
Vehicle Microcontroller Unit
ATmega32 MCU I/O
32 programmable I/O lines Operating voltage
4.5 V ~ 5.5 V Speed grades
0-16 MHz Power consumption at 1 MHz, 3V, 25ºC
Active mode: 1.1 mA Idle mode: 0.35 mA Power-down mode: <1μA
Choice of Communication
Bluetooth: powerful but expensive, complex, and power-hungry
Zigbee: developed for industrial applications… not present in consumer devices
Wireless fidelity (WiFi): integrated into PDA’s Game Boy, and many handheld platforms
Extremely Mobile User Interface Has a very short setup time Easy to pack away Familiar technology to consumers Able to operate while client is in motion Possible languages and operating systems being
considered are (Visual) C++, PalmOS, Java/Flash
Extremely Mobile User Interface
Mode 1: Manual Control of Car and Sensors
Wireless Communication
Drivers
Operating Mode
State of Machine
Distance From Object
Angular Position Of
Wheels
Current Speed of Car
Four Modules To Control Car and Tracking System
Mode 2: Diagnostical Testing of Individual
Components
Mode 3: Automatic Tracking of a Mobile Object
Mode 4: Upload Software to Car
Visual User Interface
Project Schedule
First half of winter quarter:Building components
Second half of winter quarter:Integration/programming/debugging
Everyone works in all areas, but responsibility focused for concurrent work
BudgetSystem Components and Pricing
Item Cost
ATmega32 MCU $10
Lantronix WiPort $120
WiPort antenna $10
RC monster truck $30*
Laser distance finder $30*
RF antennas **
Wiring, components $40*
Cost per system $240
*estimated**own/borrow
BudgetDevelopment Components and Pricing
Item Cost
STK500 DevKit $80
WiPort DevKit $300
Laptop **
Beacon antenna **
Signal generator **
Tools $50*, **
Administrative $150*
Cost to develop $580
*estimated **own/borrow
System Futures
The beacon tracking mode Hunter-seeker applications
The waypoint mode (greatest potential) Games Data sensing in hazardous areas Security patrols