Week 9

Team 10 Members:

Shom Bhandari   Nobuto Ishii

Brian Mckenna    Tomo Yamada

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

All fabrication of the Thermal TIM System has official been completed! (at least we hope so)

Injector Neeedle Assembly

• • Machining of injector needle finished last Tuesday

  • Press fitting into designed assembly did not work well

    • ID = 0.686 mm, OD = 1.067 mm

    • Needle buckled, had to drill hole larger which nullified “water-tight” design

  • Subsequent testing of assembly revealed leakage under spring compression at TU-DUT interface.

  • Silicon sealer purchased from Home Depot worked like a charm to fix leak.

Oveflow Sensor

• • Pump worked well last week using overflow sensor and Acrylic surface (presentation video) to halt excess water using LABVIEW.

• This week, implementing this on the actual TU-DUT hardware was the focus.

• LABVIEW software from last week worked just as planned for using TU-DUT hardware.

  • H2O interface layer halts when voltage from sensor drops below set Voltage threshold.

LABVIEW Software

• • Thermal resistance method to replenish water works for tested T setpoint values

  • 80, 100, 120 degrees C tuned to replenish water

  • Currently working on one set value of thermal resistance (theta) that will work for the desired temperature range of 100-120 degrees C.

  • Software for overflow sensor works as standalone system.

Accomplishments from Previous Week

General Accomplishments

• • Finished fabrication early in the week.

  • Additional needles were purchased after original “water-tight” design did not work. They are now extra parts should the injector need a redesign.

• Overall system test has been performed successfully, using overflow sensor and thermal resistance (theta) technique, both independent of each other.

LABVIEW VI

• Overflow sensor system officially works with Delta Design’s hardware

  • The TU/DUT have been shown to work.

• Thermal resistance method works well under good conditions.

  • Calibration of Th and Ta must be set correctly.

  • Thermal resistance still needs optimization, as it sometimes requires “tuning” to work correctly.

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

• • Optimize Thermal Resistance (theta) method of H2O interface (Shom, Nobuto)

  • Tune resistance value to reach desired value for all temperature values.

  • May implement variable theta if necessary

• Calibrate sensor and DAQ to match T-core (Shom)

  • Discover reason behind calibration curve issue, as it keeps changing.

  • Can save time during optimization.

• Combine “sensor method” of H2O replenishment with “Resistance/theta Method” (Nobuto, Brian)

  • Overflow sensor will then truly act as a backup method for thermal resistance calculation issues in LABVIEW.

  • Will need to work with software to get these 2 major methods working together.

  • Analysis of pump quantities (Tomo, Brian)

  • Measure/estimate water quantity for 1sec., 2sec.,3sec., Nsec. bursts of peristalic pump that is output at ½ - ¾ potentiometer levels.

  • This is intended to put a measurement on our final design.

  • This may have to follow optimization closely so it reflects end design.

Sponsor Comments from Last Meeting and Actions Taken to Address these Comments

• T-core box was fixed and picked up on Monday

• Be sure to attach all the attachments for the T-core box in order to start it up

• Initialization scrip file was corrupted so a copy was acquired

• Be sure to have a good thermal contact between DUT and TU while running the test

Instructor Comments from Last Meeting and Actions Taken to Address these Comments

• Acquire T-core box as soon as possible

• Report needs more work and editting

• Any fabrication needed for the project, consult Thomas or Issiah

Risks and Areas of Concern

• • We do have ADAQ-specific software questions to ask on Tuesday for Sponsor/Professor. Mainly: can ADAQ Temp. setpoints be easliy cusomizable?

• For development and optimization of our system, we wish to have smaller temperature increments between 100-120 degrees C.

• • Hopefully the two methods of interface application (overflow sensor and thermal resistance methods) will work together to create finely tuned system.

Resources or Information Required but not Available

• N/A

Schedule

Week 8 ~ Week 9

• • Testing and optimization

  • LABVIEW VI mainly, no major hardware testing/changes being considered.

Gantt Chart

Budget (list amount spent and amount remaining)

= $1500 - 284.86

= $1215.14

Progress on Report and Webpage

• • Updated ‘Final Design’ page

  • Updated Gantt Chart

  • Updated ‘Multimedia’ page

    • Video and photo gallery added to this page to visually communicate the project.