156B Week 3

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

• • We have come up with 2 new sampler design ideas and will model these designs in CAD

  • We will talk to Tom about the designs this week

  • Meeting with Chuck was canceled due to rain, will try to meet again ASAP 

Accomplishments from Previous Week

• • Developed a complete design that needs some improvements

  • Used CAD to model designs

  • Finished Design Proposal presentation

  • Finished 1st draft of the report

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

• • Tanima: Continue researching electronic methods for dispenser and decide if it is feasible in comparison to our manual method

  • David: Research ratchets to be used for cord winder

  • David: Reschedule meeting with Chuck

  • Bridget: Finalize sampler design #1 CAD drawing

  • Bridget: Prototype dispenser with CVC pipes, cord, and cord winder

  • Joseph: Finalize sampler design #2 CAD drawing

  • All: Talk to Tom about designs

  • All: Go over lab space with Ian

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

• • Sponsor was unavailable to meet this past week due to rain

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

• • Design Proposal presentation comments:

    • Dr. T suggested using music coil for cutting the sample

      • This method is included in our sample design #1 CAD drawing (which will be completed Monday night).

  • Dr. T suggested to make the rod design slightly heavier than neutral density

    • Bridget will be prototyping the dispenser this week, to get an idea of how many rods and other materials we will need. We will then keep this comment in mind once we know exactly what we need to purchase.

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

• • Design Proposal presentation comments:

    • Pedro suggested looking into "bistable mechanisms" as a cutting method for the blades because it keeps them in a stable position

      • We may consider using a bistable mechanism in our sampler design #2.

    • Damian suggested mounting the machine vertically on the kayak to make it easier for the person to lower the sampler

      • Bridget has drawn up a few designs for mounting the mechanism. We'll probably look into a mount once we finalize our design.

    • Twisting rod mechanism was suggested

    • Blade and safety

  • Zach and Joe (in other SPAWAR group)

    • Bridget talked to Zach and Joe about the current sampler designs we have already. Joe suggested we use a pump to take samples. We will talk to Chuck and see if this is feasible.

Risks and Areas of Concern

• • Design of blade position in current design presents safety concerns

  • Need to schedule a meeting with Chuck to talk about algae

Resources or Information Required but not Available

• • N/A

Schedule

• • Cutting algae samples with simple prototype

  • Prototype current dispenser design

  • Update Gantt chart.

Budget (list amount spent and amount remaining)

• • Spent: $45.80

  • Remaining: $2554.20

Progress on Report and Webpage

• • Report: Title page, summary, review of existing solutions, statement of requirements/deliverables, appendix with individual component analyses