156B Week 2

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

• CAD model of proposed design completed

• Prototype has been finished

• Determining and purchasing required components and materials to begin fabrication the following week

• Pump delivered; Need to purchase other components for assembly

Accomplishments from Previous Week

• Materials for chamber selected

• Pump tested and controller chosen (BBB)

• Camera purchased

• Image processing code finalized

• Diffusers selected

• CAD model sketched

• Finish the prototype

• Purchase Mightex Camera

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

• Purchase material for front face (Damien)

• Purchase diffuser (Teng)

• Purchase Lens (Kimi)

• Check and Purchase dowel pins, screws, and other off-the-shelf parts (Kimi)

• Perform component analysis on O-Ring and purchase

• Purchase BBB controller and RS-485 cape (Yuling)

• Test Communication between pump and BBB (Yuling, Teng)

• Decide on either machining or 3D printing cuvette body (together)

• Review design with SIO (together)

• Write Image Processing C code

• Start to machine necessary parts for prototype (together)

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

• Haven't been able to meet with the sponsor due to schedule conflicts, will meet with them on Thursday

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

• Instructor suggested a cheap peristaltic pump to use

  • Researched on the pump (part no. P625/275.143 from Instech Laboratories); apparently the company still has this product but the price went up slightly from $385 to $410

  • The pump we purchased from China does work with microcontroller, so we will use this pump and have the Instech pump as a backup option

• Use honeycomb as the diffuser

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

Risks and Areas of Concern

• We are still deciding on whether machining the chamber using aluminum or 3D printing the chamber

  • Pros of 3D printing: low cost; can iterate on the design easily; flow conditioner (diffuser) can be added directly on the pipe hole; more accurate;

  • Cons of 3D printing: material might not be strong enough; water-proofing issue

• Flow Control

  • How to make sure the fish egg will move smoothly in the chamber rather than being bumpy

  • How to control the fish egg if it moves to the edge of the chamber

Resources or Information Required but not Available

Schedule

• • Describe upcoming milestone

  • Update Gantt chart.

• Meeting with SIO on Thursday 1:00 pm

Budget (list amount spent and amount remaining)

• • Total: $3000

• Spent:

  • $2.95 (Fish eggs)

  • $346.91 (Mightex Camera)

  • $335.4 (Pump)

• Remain: $2314.74

Progress on Report and Webpage

• Start and Work on