156B Week 4

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

• • Purchased the parts for prototype

  • Researched and determined the circuits for temperature controller

  • Purchased the components for temperature controller

  • 3D printed the box for Peltier device

  • Researched for the method to power the device

Accomplishments from Previous Week

• • Updated the Ansys model to help up predict the Peltier performance and cooling results better

  • Performed the power calculation and found Peltier device is sufficient for our design

  • Made the part lists for one temperature stage

  • Researched app (Blynk) used to control Arduino devices that the doctor may be able to use with his Iphone

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

• • Manufacture copper skin contact (Khang)

  • Build and test the temperature controller for one Peltier device (Zinan)

  • Determine and purchase the power supply( Jacob)

  • Assembly the prototype (Josh)

  • Test the waterproofness of the current design (Jacob)

  • Test the performance of the cooling method and Peltier device (Zinan)

  • Prepare the presentation (Khang, Josh)

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

• • The device should have a timing function so he can control the temperature and time ( but not requires at the same time)

  • The ice is accessible so cooling with ice water is acceptable

  • The mobility is important so we need to constrain the size and weight of reservoir and also the moving parts in our device (for example, the pump can connect to the reservior)

  • Circulation the water may take too much space and we need to confine the size of tube

  • The device should be easily cleaned before the usage

  • The device should be applicable for many parts of human body, like arm and leg, also it can be applied to not only the top part of arm, but also the bottom.

  • An App is better than the button on controller

  • Ideally two forms of control-though buttons on a controller and through a phone app

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

• • Need to start the temperature controller

  • Try to consider the cone design for skin applicators for possibility of having a bigger Peltier device

  • Improve the report

  • Introduce redundancies in the circuitry in order to increase the reliability of the circuits

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

• • N/A

Risks and Areas of Concern

• • We are wondering the if current sealing design works well and how to design the layout of circuit to prevent the components from water

Resources or Information Required but not Available

• • N/A

Schedule

• • Manufacture the copper skin contact before Tuesday

  • Build the prototype before Wednesday

  • Test the controller before Wednesday

  • Trouble shoot on Thursday

Budget (list amount spent and amount remaining)

• • $196.65 Spent

  • $2803.35 Remaining

Progress on Report and Webpage