System for Engine Location Of a Web Train

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System for Engine Location Of a Web Train

• Paul Wimmer and Adam Weintrop
• Dr. Irwin and Dr. Schertz
• 1/30/06

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Outline

• Current position on time line
• Accomplishments of Fall Semester
• Goals for next week

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Time Line
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Outline

• Current position on time line
• Accomplishments of fall semester
• Goals for next week

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Fall Semester

• Designed hardware to use the 2-bit method
• Created DCC command program
• Took measurements
• Software flow charts
• Built 1st hardware section for amplification

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2-bit Method

• Because the software only needs to determine 3
  train states
• 0 0 Train off track
• 1 0 Idle state
• 1 1 Train running

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Differential Amplifier
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Results
Situation Voltage from DMM
Train OFF, power on lt8.2 mV
Train OFF, power off lt1.5 mV
Train idle, off track 11 mV
Train idle, on track 11.5 mV
Train ON, power off 20 mV
Speed 1, train on track 30 mV
Speed 10, on track 80 mV
Speed 28, on track 195 mV
Train running off track 11-12 mV
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Idle / Off

• Additional gain is needed to help determine
  between idle and off track states
• Software will help determine these states

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Outline

• Current position on time line
• Accomplishments of fall semester
• Goals for next week

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Problems to Address for Next Week

• Finish hardware (comparators, interfacing)
• Multiplexing design
• Work on software (hardware I/O)