The Flame Tracker @ SDSU

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The Flame Tracker _at_ SDSU
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Flame Controller Layout
Thermocouple
Stepper Motor
Moving Apparatus
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Flame Tracker How It Works!

Stepper Motor
Sample Holder
Guide Rail
Lead Screw
Flame
Test Stand
Teflon Nut
Fuel
Carriage
Pillow Block
Tracking Thermocouple
As the flame reaches the tracking thermocouple,
the stepper motor moves the sample upward to
maintain a constant thermocouple temperature. The
flame becomes stationary with respect to the
thermocouple, hence, the laboratory.
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Stepper Motor Controller

• Serial Port communication
• Created software driver
• instead of expensive board

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Labview Control Program.

• Front panel with Velocity vs. Time graph
• Transformation equation parameters

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Wiring Diagram
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Software Driver

• Labview makes special driver board for stepper
  motor
• Designed software driver using serial port vis.

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Transform Control Diagram
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Hardware
Breakout board with Analog Device 5B47 modules
Pentium IV 1.4GHz
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The Initial Test, AFP, Air, 0.16 mm Thick
The velocity graph above shows a preliminary plot
of the spread rate as measured by the flame
tracker. It is the velocity at which the sample
is moved to hold the flame stationary with
respect to the laboratory coordinates.
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A stationary flame.
Thermocouple
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Flame Tracker in OperationSpreading Flame
Converted to Stationary Flame
Thermocouple
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Repeatability of the Spread Rate Measurement by
the Flame Tracker
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Comparison with Manual Measurement
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Comparison with Manual Measurement
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Comparison with Manual Measurement