156B Week 3

Team 14 Progress Report

Winter 21 - Week 3

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

• Transitioning from Design Phase to Early Testing Phase

  • Parts for force sensing have officially been purchased

  • Parts to be fabricated now being modeled on Solidworks and will be finalized by end of the week

  • Code for digital imaging getting prepared

Accomplishments from Previous Week

• Parts purchased (through Archana)

  • Pressure sensors, resistors, and breadboards for initial circuits (chosen by Ryan and John)

  • Testing apparatus also purchased (rubber bands, elastic bands)

  • No parts to be purchased for strain yet

• Stress method finalized after design review (Ryan and John)

  • Stress components to be fabricated have been initially CADded (John)

    • Design review with sponsor

    • Allows for both “push” and “pull” methods

    • To be submitted for printing soon

• Foundation for strain code for digital imaging begun (Tejas)

  • Will use iPhone camera for now

    • Matlab imaging

• Design proposal presentation (All)

  • Prepared design proposal

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

• Stress

  • Submit CAD models for 3D printing (John)

  • Set up and calibrate FSR circuit (John and Ryan)

    • Analyze proper equations to convert analog readings to force (Ryan)

• Strain

  • Begin imaging testing w/ markers and rubber bands (Archana and Tejas)

• Intellectual Property (All)

  • Begin listing all references used to inspire project aspects

    • Find any patents for devices that may have been used

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 on January 19 (via Zoom)

  • Design review of current stress CAD models, sponsor advised that interfacing w/ nerve tissue can be borrowed from current surgery tools

    • CAD model to be edited to include removable end pieces that allow for different interactions w/ the nerve tissue

  • Strain (digital imaging) method discussed, Sameer advised that we initially start with any two different images, does not have to be rubberband right away

    • Initial calibrations can be conducted w/ any plane and markers, then move on to rubber bands

  • Prepare for intellectual property process, note references and such

    • Add all references (pictures, patents, devices) to drive folder for easy access during intellectual property process

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

• Scheduled Meeting on January 14 (via Zoom)

  • Discussed ideas regarding sensors and strain measurements, professor had questions regarding how pressure/force sensors can give stress measurements

    • CAD model now describes how we plan to translate interaction w/ nerve tissue into a reading on the force sensor

  • A lot of back and forth usually goes on, was wondering if we could involve both the professor and our sponsor in the same meeting

    • Currently coordinating availability of both professor and sponsor to see if any meeting times can coincide

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

• N/A - Report Submitted before presentation on Thursday (1/21)

Risks and Areas of Concern

• 3D printing times, will contact Chris Cassidy regarding potential production/shipping

Resources or Information Required but not Available

• N/A

• (Possibly some difficulty in obtaining specific patents later, but none for now)

Schedule

• Thursday: Design Proposal Presentation

• Friday: Begin assembling circuit to calibrate force sensitive resistors

• Saturday: Submit CAD models for 3D printing, begin calibration of digital imaging

• Sunday - Wednesday: Continuous testing

Budget (list amount spent and amount remaining)

• Amount Spent: $70.29

• Amount Remaining: $2529.71

Progress on Report and Webpage

• Report:

  • Select sections of report (due Week 2) now complete

  • Impact on society section to be added by Friday

• Webpage

  • Weekly progress reports updated

  • Gantt chart constantly being updated

  • Budget report now uploaded

  • CAD models to uploaded upon completion of first prototype iteration