156B Week 1

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

• Camera and image processing

  • Compare different camera (Mightex, Basler, Teli) in risk reduction and purchase Mightex USB 2.0

  • Design camera mounting mechanism which enables the adjustment of the FOV (Field of View)

  • Select the correct Lens

• Chamber design

  • Determine the size of the chamber (width, height, and thickness)

  • Add diffuser to the bottom of the chamber to reduce the entrance effect

  • Add mesh to the pipe holes to prevent object from escaping the chamber

• Individual component analysis

  • Damien: chamber material

  • Kimi: camera

  • Teng: tube fitting

  • Yuling: pump

Accomplishments from Previous Week

• Finish PowerPoint for risk reduction and show it to SIO

• Discussed the conceptual design of the chamber

• Started CAD drawing of the chamber

• Researched on tube fittings for different configurations

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

• Finish the CAD of the prototype and start to machine parts (Chamber)

  • Determine tube fitting- (Teng)

  • Choose materials for chamber (aluminum, Ultem, acrylic, polycarbonate - combinations?) - (Damien)

  • Simulate 3D velocity profile using matlab/solidworks (secondary) - (Damien)

  • Finish image processing code, purchase camera - (Kimi)

  • Purchase pump that allows for our own controller in order to achieve adequate voltage resolution - (Yuling)

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

Tuesday, March 17 - Met with Dr. Franks and Jessica Garwood at SIO to present Risk Reduction powerpoint

• Good risk reduction on fluid analysis, pump selection, and image processing

• Concerns from sponsor: possible air bubbles in the chamber that could cause problems in the flow

  • solution: add a valve on top of the chamber to allow air to exit

• Need PID control. We are implementing customized and programmed microcontroller

• Potential error in the 3D velocity profile, concerns about viscous boundary layer. Simulation of profile will be done

• Mesh at the bottom of chamber/cuvette - We are looking into possible solutions

• Temperature control (the water needs to be colder than the surrounding air) - This was a small area of concern and will only be addressed if time permits

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 select a pump without build-in controller and use Arduino or BBB to control to solve resolution issue

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

• 3/19 - Student commented on processing images of non-spherical shapes. We may be able to take multiple snapshots and average the shapes to determine an approximate circular surface, but our primary objective is controlling spherical objects.

Risks and Areas of Concern

• Camera and image processing

  • Image processing feedback

  • Camera Trigger

• Pump

  • Accurate pump

  • control algorithm

• Chamber

  • Machinable material

    • Potential leaks if multiple materials used

Resources or Information Required but not Available

Schedule

• • Describe upcoming milestone

  • Update Gantt chart.

Budget (list amount spent and amount remaining)

• 3000

  • Spent: $ 2.65 (Fish eggs)

  • Remaining: $ 2,997.35

Progress on Report and Webpage

• Will start writing the introduction of the report this week