Supervising Professor: Dr. Jorge Rocca Senior: Michael M. Rader - - PowerPoint PPT Presentation

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Supervising Professor: Dr. Jorge Rocca Senior: Michael M. Rader - - PowerPoint PPT Presentation

Apr 12, 2023 126 likes •384 views

Supervising Professor: Dr. Jorge Rocca Senior: Michael M. Rader Team Members: David Yazdani Reed Hollinger Clayton Bargsten Mark Woolston This is a continuing project - System already existed, building on Summer research work and

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SLIDE 1

Senior: Michael M. Rader Supervising Professor:

  • Dr. Jorge Rocca

Team Members: David Yazdani Reed Hollinger Clayton Bargsten Mark Woolston

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SLIDE 2
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SLIDE 3
  • This is a continuing project
  • System already existed, building on Summer research work

and previous senior design project.

  • Goal is to replicate system three more times
  • Additional goal is to identify any bugs or needed

features

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SLIDE 4

Beam Alignment

Top-Down View of Alignment Arrangement

  • Allows four degrees of freedom,

adjusting position and angle

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SLIDE 5

Beam Alignment

Top-Down View of Alignment Arrangement

  • Allows four degrees of freedom,

adjusting position and angle …Why is precision alignment important?

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SLIDE 6

Necessity of Beam Alignment

  • PRECISION/ACCURACY
  • PREDICTABILITY
  • POWER TRANSFER
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SLIDE 7

Necessity of Beam Alignment

  • PRECISION/ACCURACY
  • PREDICTABILITY
  • POWER TRANSFER

…okay, so what causes misalignment?

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SLIDE 8

Misalignment WARPING OF OPTICAL TABLE VIBRATION TEMPERATURE VARIATION

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SLIDE 9

Stepper Motor

  • Linear Actuators
  • 1.5 µm linear travel/step
  • 7.5 V Step Input
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SLIDE 10

Feedback Detection

Pacific Silicon QP50-6-18U-SD2 Quadrant Photodiode Image courtesy of Pacific Silicon

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SLIDE 11

Feedback Detection

Image courtesy of Pacific Silicon

  • Photocurrent is produced when beam strikes diode
  • Photocurrent is passed into a current to voltage amplifier
  • Chip returns Top-Bottom, Left-Right and Sum
  • f voltages
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SLIDE 12

Algorithm

Microcontroller

  • Texas Instruments

MSP430FG4618

  • Code written in C
  • Passes output to

motor driver PCB

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SLIDE 13

Motor Driver PCB

Allegro A3979

  • Product of previous

Senior design project

  • Interprets input

from Microcontroller to control the motors

  • Can adjust step size to:

Full, 1/2, 1/4, or 1/16

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SLIDE 14
  • Used for manual

alignment

  • Wireless TX/RX
  • Decoder/Encoder

Wireless PCB

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SLIDE 15

Front Panel

  • LCD Display shows which

mount is selected and which speed the motors are stepping at.

  • Logic prevents non-expected

inputs such as multiple directional selections at the same time

  • LEDs indicate which direction

motors are moving

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SLIDE 16

Back Panel Design

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SLIDE 17

Back Panel Design

  • Hirose Shielded Bayonet

Lock Circular Connectors connected to shielded wire.

  • Improved SNR,

Portability and Aesthetics

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SLIDE 18

Code Revisions

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SLIDE 19

Code Revisions

  • Deleted unused variables and code
  • Added Function Prototyping
  • Consolidated 8 functions into single

function

  • Added comments
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SLIDE 20

Installation and Testing

  • Two systems assembled and tested in

temporary system

  • Both systems installed and tested in lab
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SLIDE 21

BUDGET

  • Bayonet Lock RF Connectors ~ $680
  • Linear Actuators for Next Two Systems ~$1700
  • Quadrant Photodiodes for Next Two Systems ~$800
  • Current Total ~ $3,180
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SLIDE 22
  • Finish purchasing parts for next two systems and assemble
  • Implement feature that will stop the motors from

moving when the beam is broken

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SLIDE 23
  • David Yazdani
  • Reed Hollinger and Clayton Bargsten
  • Mark Woolson
  • Dr. Jorge Rocca
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SLIDE 24
  • David Yazdani
  • Reed Hollinger and Clayton Bargsten
  • Mark Woolson
  • Dr. Jorge Rocca
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SLIDE 25