156B Week 10

Team 14 Progress Report

Winter 21 - Week 10

Overview of Status of Analysis, Design, Fabrication, Tests, etc.

• Designs have been finalized

  • Both devices have gone through final testing phases

  • Locked in and being prepared for final design review with sponsor

Accomplishments from Previous Week

• Stress

  • Final form factor has been assembled

  • Completed final testing of rubber bands w/ grid line rig (John)

    • Able to generate stress-strain curves for sutured and served rubber bands

  • Completed code for LCD integration (Ryan)

    • Code also now gives decimal values instead of only integers

• Strain

  • Final experimental setup completed

  • Recorded new videos of O-ring testing using phone mount (Archana)

    • Circular surface markers used for strong contrast and clear detection

  • Analyzed new videos in Matlab and successfully extracted strain values in terms of pixels (Tejas)

• Overall

  • Completed final design review with Sameer

Goals for Next Week (list names after each item). Use specific and measurable objectives.

• Stress (John and Ryan)

  • Complete LCD circuit integration

  • Run proof of concept with handheld version

    • (integrate LCD into form factor, use battery pack, get values without being plugged into computer)

• Strain (Archana and Tejas)

  • Update CAD model with explanation of key dimensions

  • Relate ruler markers to strain values using digital calipers (possibly ImageJ)

  • Start thinking about potential sources of errors that can be included in final presentation/report (e.g. torsion in the O-ring causes radius of marker to change)

• Overall

  • Complete final report

  • Complete IP disclosure

  • Finalize webpage

  • Prepare senior day presentation

Sponsor Comments from Last Meeting and Actions Taken to Address these Comments (indicate date of comments and if via email or in person)

• Sponsor Meeting held on Tuesday, March 9 (over Zoom)

  • Conducted final design review and went through final logistics with sponsor

Instructor Comments from Last Meeting and Actions Taken to Address these Comments (indicate date of comments and if via email or in person)

• Asked about changes to strain setup

  • Explained new O-ring and paint markers setup, proved to be more successful in terms of DIC tracking

• Asked about success of FSR calibration

  • FSR calibrated to every 0.5N, but not recommended to move forward with FSR, will add piezoelectric sensor to design recommendations

• Advised to finish strong with the report and webpage, had two reviews at this point

  • Will make you proud, thanks for everything Professor T and Darren <3

Comments from Other Students in the Class (indicate date of comments and if via email or in person)

• N/A

Risks and Areas of Concern

• N/A

Resources or Information Required but not Available

• N/A

Schedule

• Thursday-Weekend:

  • Finish LCD integration circuit

  • Finish final report

  • Finalize webpage

  • Finish IP disclosure

• Monday-Wednesday:

  • Prepare for Senior Day presentation

Budget (list amount spent and amount remaining)

• Amount Spent: $389.61

• Amount Remaining: $2210.39

Progress on Report and Webpage

• Report is 90-95% complete pending final revisions, and all info will be translated properly to the website