156B Week 2

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

• • Designing a fit that would connect the control head of the bronchoscope to the insertion tube is the teams priority for the following weeks.

    • Different methods of controlling a rotating shaft are being tested and the feasibility of the design is being determined.

  • The teams electromagnetic design still on the list as an option, but analysis continues to demonstrate its inability to work in the scale of our work. 

  • Purchasing parts for two working prototypes has already begun

Accomplishments from Previous Week

• • Team was able to come together on finalized design to pursue and begin building

  • Parts were ordered to begin building process

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

• • Finalize the flex fit design for detachment and reattachment (Mark)

  • Determine the size of the pulley to fit in the insertion tube (Eric)

  • Design the optimum fitting needed to rotate the shaft and the bearing sizes needed to connect to the pulley mechanism in the insertion tube (Matt)

  • Build a pulley mechanism model with the size, shaft, and bearing sizes accounted for (Eric & Matt) 

  • Determine the design of the lever and do analysis on the gear ratio needed to account for the discrepancy between the rotation of the lever and the rotation of the pulley mechanism (Gio)

  • Researching parts to purchase for prototype (All)

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

• • Mechanical route seems like a more feasible and simpler approach (in person, 4/6)

  • Can build the bending section using silicon molding (in person, 4/6)

  • Can use fishing wire as angulation wires (in person, 4/6)

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

• • Wires can be wrapped around pulley twice to possibly avoid slipping (in person, 4/4)

  • Can create more rigid ends of angulation wires at the detachment location to help in detachment/reattachment (in person, 4/4)

  • If using electromagnets, must consider that they will heat up as they are in constant use (in person, 4/4)

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

• • Team's hex design was created under the assumption that the pulley system can fit in the insertion tube 

Resources or Information Required but not Available

• • Bronchoscope device still has not been able to be acquired

Schedule

• • Milestone for the following week is to finalize purchasing parts for the prototypes.

  • It is also a priority to finalize hex design so that it can be analyzed using SolidWorks software and as well as finalize the detachment mechanism. 

Budget (list amount spent and amount remaining)

• Amount spent: $91

• Amount remaining: $1409

Progress on Report and Webpage

• • A rough draft of certain sections of the report will be worked on this upcoming week