*156B Week 2

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

• • Went to a local store on Miramar road called Harbor Freight Tools and purchased some wire to be used with the locking mechanism as well as a chisel holder which could potentially be used as a handle for a prototype

  • Some energy analysis and CAD work has been done for the new Linear Press and Scissor Lift designs

Accomplishments from Previous Week

• Clarified the details on the new secondary objectives that the sponsor had.

  • System to prevent air from flowing into the line can be mechanical instead of electrical

  • Received Cell-Saver Bag

• Decided to put Clamp design considerations on hold to pursue more feasible alternatives

• Began energy analysis of scissor lift design 

  • Determined dimensions of scissor lift design

  • Sketches completed

• Began design and analysis of linear press

  • Made solidworks model of new design

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

• • Meeting with Dr. Mazzei on 4/6/12

    •  In spite of the additional sensing component, he would like the compression action to remain simple and wire free

    • Consider a rotating actuator that would have mechanical advantage similar to a screw

    • Cj showed him some of the safety mechanisms he had found for the component analysis and he liked the remote aspect of them

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

• • Meeting with Dr. Delson on 4/5/12

    • Make progress report more specific

    • Focus on the compression of the IV Bag instead of air sensing

  • Actions Taken:

    • Rewrote week 1 progress report

    • Put a hold on Cell-Saver Bag consideration until overall design is more developed

  • Meeting with Mike Morris 4/10/12

    • Conduct feasibility analysis before continuation of prototype fabrication

    • Concerned over the narrowness and location of pivot in clamp design

    • Suggested a Scissor Lift Mechanism

  • Actions Taken:

    • Halted production of prototypes in order to conduct a more thorough analysis

    • Initial design of Scissor Lift mechanism drafted and Energy Analysis started 

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

• • Why can you not use a pump and micro-controller? It would be relatively cheap, could be battery powered, and be much smaller than our current design options. (4/11 in person)

Risks and Areas of Concern

• • Scissor Lift

    • Validity of equations

    • Force required for operator to open the mechanism

  • Linear Press

    • How to attach a lever to the linear press in order to make it easier to pull apart 

    • What spring dimensions to use with the linear press

    • Placement of springs and guide rods on the linear press

Resources or Information Required but not Available

• • N/A

Schedule

• • Finish analysis and design on all concepts by April 14th

  • Order materials for prototypes by April 17th

  • Construct Prototypes by April 25th

Budget (list amount spent and amount remaining)

• • $1500

Progress on Report and Webpage

• • Webpage was set to private