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Group Meeting Notes

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Wednesday, March 15/2017

  • Sharpening Tips

  • look for tips we can buy to attache to base prototypes

  • check SMA wires and tube stock

  • multiple trials for needle in air prototype (10 trials) (note current needed for certain deflection)

  • good video of needle insertion in gel

  • multiple trials gel

  • look into friction coefficients for printed material

  • look into films for frictionless joints

  • look into hand

  • email bardia publications

  • look into material properties, for nitinol actuation​

 

Monday, March 6/2017

  • Nylon joint too flexible in gel, may needle to wrap with something for stability​

  • Force and torque sensors (or haptic device)

  • ​Labview, free basic version?​

  • Look into Saarland University nozzle 

 

Wednesday, January 11/2017

  • FEA

    • transient ​

    • with nylon and SMP

  • Small needle testing​

  • Stage setup

  • Phantom gel

  • Look into other funding options

  • SPIE

  • Oral presentation #1 approaching

  • No conferences (no funding) so perhaps publish a paper instead

 

End of Fall Semester

 

Wednesday, November 30/2016

  • Reevaluate budget and submit to Dr. Konh

  • FDR notes

    • include: prototypes, wire testing, video aalysis, FEA

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Monday, November 28/2016

  • Magnetic tracker shipping soon

  • Consider testing nitinol heat treatment on a sheet of nitinol to observe behaviour

    • Locate oven to perform heat treatment

  • Consider testing nitinol heat treatment on a sheet of nitinol to observe behaviour

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Wednesday, November 23/2016

  • Design testing with changing parameters (length, diameter, cycles, ..)

  • Research how to train wires

  • Look into alternative manufacturing methods like water jet cutting

 

Monday, November 21/2016

  • Review prototype 1 for dimension errors

  • Send Dr. Konh SW files to print

  • Research correlation between stress and deflection speed

 

Wednesday, November 16/2016

  • Look into video software that can capture still frames ever set time interval

  • Research nitinol springs

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Monday, November 14/2016

  • To do:

    • FEA​ - Problems with Nylon connector

    • Image J

    • Study how fast wires will actuate

      • ​relate to wire thickness

  • Research laser sintering manufacturing

  • Consider testing multiple small wires vs one large

 

Wednesday, November 9/2016

  • Task division

    • SW prototype modifications - Taylor

    • Video analysis of bending video - Sean

    • Testing - Sean, Dayne, Chad

    • FEA - Taylor, Lauren, Wei, Matt

  • Notes for FEA:

    • Two methods for actuation.

      • Define wire with linear thermal expansion

      • Use a percent elongation

 

Monday, November 7/2016

  • Tripod set up for wire test

  • Get familiar with raspberry pi for testing

  • Find out when funding has been approved in previous years (REU - Nov 14, UROP Nov 23 (notification))

  • SPIE application needs testing results

  • Work on printing current prototype scales down

  • Need to reprint ram rod and parts with thread on printer highest quality

  • Waiting on needle sent from surgeon

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Friday, November 4/2016

  • Chad and Sean: Inventory of SMA wires

 

Monday, October 31/2016

  • FEA Workshop

 

Wednesday, October 19/2016

  • Design modifications discussed​​​​

  • Linear stage selected (calling about prices)

  • Gel for experimentation(waiting on material orders to make)

  • Current prototype reconstructed and waiting on testing (today)

  • Review german SMA hand

  • Add details to current design Ideas

  • Follow journal medical devices (ASME - UH has subscription)

  • Robert Webster Vanderbilt (look up research and curve needle extending like a tv antenna)

  • Complete peer review by Mon. 24th

  • Design notes:

    • Note SMA take about 15s to cool from temp that will be reached

    • Look into plastic needles 

    • 30 degree bend would be sufficient (notes from surgeon)

    • Tip of needle be as small as possible

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Monday, October 17/2016​​

  • Conduct a brainstorming session this week (include design process)​

  • Select designs

  • Review notes from meeting with surgeon

  • Select linear stage with rotation

  • Look into SPIE

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Monday, October 3/2016​​

  • Create support for testing needle (limit metal parts due to interference in testing)

  • Design journals

  • Look into conferences/competitions

  • Look into SMA spools

  • Explore the nozzle and hand prototypes (link in email)

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