Week 7

Week 7: Progress Report

Team 10 Members:

Shom Bhandari Nobuto Ishii

Brian Mckenna Tomo Yamada

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

Overflow Sensor

• All new sensor materials arrived, fabrication of the final sensor design continues.

Calibration of Pump

• Pump set at Power Supply Voltage of 17.729V, Potentiometer Voltage of 1.245 V, the flow rate of the pump is 0.012mL/sec.

Hardware

• Acquired materials. In process of assembling.

Accomplishments from Previous Week

Overflow Sensor

• New sensor tested using Cu foil  and double-sided Polyimide semiconductor tape.

• Dimensions: Cu foil (1 mil), Polyimide/Kapton tape (1 mil), combined silicon adhesive on tape (1.5 mil). Note 1 mil ~0.001 inches.

  • Est. thickness at water edge >3.5 mil

• Tape sticks well to Cu surface, wires solder well to Cu foil as well:

• Work instructions were generated for the sensor to now, and added to the appendix portion of the final report.

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

(may be delayed?)

- Perform if the DUT-TU system properly works (Tomo, Nobuto)

1. Run Adaq (DUT-TU system program) at different temperature under water’s normal boiling point

2. Run Adaq at DHF 100 (Command that sets temperature of DUT’ heater to 100C) and observe. Repeat this couple times.

3. Run Adaq at DHF 120 and observe.

(note: use the prototype water feeding system and control the flow manually.)

(note: Be sure to have there’s a good surface contact between TU and DUT, else, will burn up the DUT)

4. If anything unusual happens, contact the sponsor as soon as possible

- Perform a performance test of the system. (Shom, Brian)

- DUT power control system (Brian)

1. Set the Reference temperature at 100C

2. Set the DUT heater temperature at 100C

3. Apply 10W from a power source and observe if the system is properly functioning

- Flow Control (Shom)

1. wire all the necessary components.

2. Run Adaq at DHF 80

3. Run the flow control program

4. Observe if the pump is supplying the water after reaching sertain thermal resistance.

5. repeate 2~4 with DHF set at 100

- Overflow sensor (Brian)

1. attach the sensor onto the system.

2. wire all the necessary components

3. Run th Adaq at DHF 80.

4. Run the pump at low flow rate by adjusting the potentiometer.

5. Observe if the overflow sensor is properly working.

6. Run the Adaq at DHF 100 and 120.

7. Run the pump at higher flow rate.

8. Observe if the overflow sensor can be repeat its performance

- Overall system performance test (Shom and Brian)

- Attach all the system together, and perform the all the test.

1. perform condition when the overflow occurs,

2. perform condition when the underflow occurs

3. perform condition when DUT is set at 120C

4. perform condition when DUT is at 120C and Power Supply attempts to supply 10 W.

- Make any adjustments needed for the hardware of the system (Nobuto, Tomo)

1. Wiring (any loose, or adjustment of the lengths of wires)

2. Tubes (any way to keep the tubes from intertwine with other parts? or become a hinderance?)

3. Leakage need to be fix?

4. placement of the pump

- (if there is time) Acquire WIlliamson’s Pump (Brian)

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

Clarification of Thermal Resistance Calculation

Thermal Resistance

•  θ = (Th-Ta)/P

  •  θ = Thermal Resistance between DUT and TU

  • Th = temperature of TU

  • Ta = Temperature of DUT

  • Power supplied to DUT

    • P = Power supplied to DUT = Vh * iR

      • Vh = Equivalent Voltage of DUT Heaters (aligned in parallel)

      • IR = Current going through a resistor = VR/RR

        • VR = Voltage of a resistor

        • RR = Resistance of a resistor (known value)

        • From Krikoff’s law, current through a resistor should equal to a current through the DUT

        • We need to keep the resistance of a resistor low for a low power dissipation from the resistor

Pump Control

Presented two ideas:

1. Have constant flow rate and have On/off control

2. Variable flow rate, and adjust to the temperature of the DUT

Answer: simpler the better

Attachment to TU

• Usage of a gasket material:

  • Can shape the gasket into any shape, so it is easy to implement to the attachment for a seal

  •  However, gasket needs more pressure in order to work. On other hand, O-ring can seal at low pressure. So use an O-ring

• Couple Ideas of attaching the dispenser to the TU

  • Simply fill the hole with water

    • Pro: easy to make

    • Con: precise flow control is difficult

  • Make an attachment/aligner

    • Pro: capable of precise flow control

    • Con: may have difficulty fabricating

• Sponsor provided us with small O-rings

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

• Names must be assigned to tasks

  • This was corrected after last week’s meeting.

• All materials must be ordered ASAP.

Specific areas of concern regarding the Report:

• Abstract must be corrected to address variable T up to 120C.

• Pump chart contained inconsistencies.

  • MSRP of our pump must go into budget, not ebay cost.

• Water analysis section must be corrected to contain more useful information.

• Labview cost must go into budget.

• Budget vs. Cost terms must be corrected on report.

• Appendix must contain more information.

• Delete DMM and other redundant pictures.

• More calculations must be added to report.

Risks and Areas of Concern

• Integrated LABVIEW VI’s not proven to work together.

  • Number of analog inputs may be insufficient

  • Although each VI works well seperately, project depends on 1 VI file to function.

• T-core box's power source continues to fail. This may delay our test performance for the project.

Resources or Information Required but not Available

• Due to the power supply of the T-core box needing repair, this limited the test of the integrated LABVIEW vi.

Schedule

Week 7 (2/20 ~ 2/24)

> Integrating LabVIEW programs (mainly three systems)

> Finalization of assembly

> Testing LabVIEW feedback controlling systems

           > Test Run for entire systems

Week 8 (2/27 ~ 3/2)

    > Optimizing designs and systems

Week 9 (3/5 ~ 3/9)

> Optimizing designs and systems (Final Checkup)

Gantt Chart

Budget (list amount spent and amount remaining)

Progress on Webpage

• Updated gantt chart

• Updated progress report

• Improving ‘Home’ , ‘Final Design’ , ‘Multimedia’