Transcript System for Engine Location Of a Web Train

System for Engine Location Of
a Web Train
Project Proposal -CTCDS
Paul Wimmer and Adam Weintrop
Dr. Irwin and Dr. Schertz
12/5/05
Outline
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Introduction
Functional Description
Block Diagram
Standards
Schedule
Equipment List
Conclusion
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Introduction
Engine Location
Current Sensors
Engine Location System
Average Speed
The “Web Train” is a n-scale model train that is
controlled by a remote user. The Engine Location
System will determine the location and speed of the
engine
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Future Applications
• At the end of the year – a fully functional
web train
• At the end of ten years – a system for toxic
manufacturing automation
• At the end of 50 years – a underground
mining operation on Mars
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Outline
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Introduction
Functional Description
Block Diagram
Standards
Schedule
Equipment List
Conclusion
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Functional Description
Train Track
segments
Input
Hardware
system
Microcontroller
Output
Computer
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Outline
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Introduction
Functional Description
Block Diagram
Standards
Schedule
Equipment List
Conclusion
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Hardware Block Diagram
Inputs
Current Sensors
(Resistors across
track segments)
System
Amplifier
Outputs
Analog to Digital
Converter
Multiplexer
Microcontroller I/O
Ports
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Current Sensing Methods
Method
Pros
Cons
Built in the
microprocessor board, #
of trains
Requires more software
10-bit
Can determine # of
trains and # of cars
Expensive
“2-bit”
“2-bit” method can be
designed cheap enough
to have the A/D on every
track segment, this
reduces analog related
problems
Cannot determine # of
trains
8-bit with variable
range
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Hardware Block Diagram
Inputs
System
Outputs
Current Sensors
(Resistors across
track segments)
Amplifier
Analog to Digital
Converter
Multiplexer
Microcontroller I/O
Ports
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Hardware Design
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Hardware Simulations
Both low
(resistor is
carrying
High current)
No current through resistor
One high, one low
(resistor is
carrying low
Current)
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Software Flow Chart
Gather Data
Determine weather
the train is on this
segment of track
Compute Values
Compare velocity
to a known amount
of time
Compare position
to a known amount
of time
Compute the
velocity
Compute the
Acceleration
Compare to the
previous segment
of track
L o ca t
ion
Compare to lookup table values
New
Sample an input
Send position,
velocity and
acceleration
information to the
CPU
Get New Data
Switch digital
inputs
Same train location / train
not in motion
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Software Design
Track Layout
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Software Design
Track Section 1
Track Section 2
Current
Current
Current
of
ofSection
of
Section
Section
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=Current
Currentof
of
Section
Section
Section
2 22
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Expansion to more Track Sections
• With only the inner loop, we cannot test
direction
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3
Must check
2 and 3
Must check 4
And 1
This is just
4 – this must
Be done with
21 segments
1
Train
2
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Outline
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Introduction
Functional Description
Block Diagram
Standards
Schedule
Equipment List
Conclusion
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Standards
DCC Standard
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Outline
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Introduction
Functional Description
Block Diagram
Standards
Schedule
Equipment List
Conclusion
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Schedule – Gantt Chart
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Outline
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Introduction
Functional Description
Block Diagram
Standards
Schedule
Equipment List
Conclusion
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Equipment
• We will use the web train board
• If hardware system works well, we hope to
make PCB
• New microcontroller board if necessary
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Outline
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Introduction
Functional Description
Block Diagram
Standards
Schedule
Equipment List
Conclusion
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Conclusion
Successful because of
• A/D innovation
• Project can progress with current equipment
• Expandable
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Conclusion
Utility of this Project
• If user sets speed of each engine, why do
we need a system to tell the user where
the engine is?
– Internet has delays—this is local information
– Can be used to implement collision avoidance
– Also needed train decoupling information
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Questions?
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