Overview of Status of Analysis, Design, Fabrication, Tests, etc.
Determined optimal max k value to be .25 N/m
Easily achieves low force values with minimal control efforts
Implemented a "freeze" button into the code and the system
Debugged LCD read-out issues
Created 5 ergonomic designs for potential cases and user interfaces
Presented 2-3 ergonomic drawings to Dr. Hofflich
Researched smaller LCD screens
Research on different methods for data logging such as SD card, blue tooth, or WiFi
Design Decision
Only one source of compliance will be used
Decided on shim stock
Accomplishments from Previous Week
Chose a max k value
Implemented a "freeze button"
Decided to only use shim stock for compliance
Goals for Next Week (list names after each item). Use specific and measurable objectives.
Ergonomic design chosen with model cadded
Printing will ensue later in the week or the following week (6)
Design decision
Linear bearing system for the rod
OR joint system
Buy the "wall plug" power cable and implement it into system
Sponsor Comments from Last Meeting and Actions Taken to Address these Comments (indicate date of comments and if via email or in person)
Meeting, 4/30/2013
Consider making a hard stop at 10 grams or other increments
A series of incremental hard stops
The main issue is that the distance is too small for the sensitivity and is not robust enough, so it is still too sensitive
Need to reduce the k value and add springiness to the system
Have a clicking mechanism to indicate 5 g, 10 g, 15 g, etc
Foot picture on the print-out so we can see what locations we are currently considering
Can be considered now or in the future
Data logging; MicroSD or other SD card is fine
Technology they are currently working with is scanning and uploading physical documents, so for their system this is sufficient
Dream vision is to have a picture of a foot noting color codes at different points with numbers at each point
Go with most feasible design
Simple print-outs are fine
The order of testing the foot does not need to be random, so a systematic system is fine
Next step is to try devices on the patients
Instructor Comments from Last Meeting and Actions Taken to Address these Comments (indicate date of comments and if via email or in person)
April 25, 2013
Implement a "freeze" button into system: done
Find optimal max k value: done
Compare compliance systems with pros and cons
Spring Vs. Shim Stock
Design Decision between springs and shim stock
Choosing Shim Stock system
Look into smaller LCD without shield: done
Research different methods of data logging: done
Create 4-5 ergonomic drawings, which includes screen options, buttons, shape and choose 2-3 to present to Dr. H
Comments from Other Students in the Class (indicate date of comments and if via email or in person)
3-D Print in the next 2-3 weeks
Risks and Areas of Concern
Proper force transfer
Rigidly attach the rod to the shim stock or create a linear bearing system
Plastic deformation of shim
Data logging
Schedule
Mechanical Prototype Device with new shim stock week 5
Electrical Functioning Design Prototype with LCD screen week 6
Test new load cell
Fully Functioning Prototype with mechanical and electrical components functioning week 7
Optimizing Final Design week 7-9
Finalized Prototype week 9-10
Budget (list amount spent and amount remaining)
LCD Screen: ~$25
Budget remaining: 1389.00
Progress on Report and Webpage
Divided up first draft of the report and began working on sections
Began developing front page
Completed Background
Worked on Existing Solutions
Completed Statement of Requirements
Worked on Impact on Society