156B Week 3

Past week accomplishments:

• Set up pump/vacuum air circuit

  • Found new issues with driving the motor, probably solution is in mind

• Designed the new force sensor configuration and sensor device

• Designed an initial balloon model with just foam and a silicone sheet

  • Will explore more alternatives later

• CAD modeling various components in our system for future modeling and presentation

Sponsor Feedback:

• The ideal starting inflation of the balloon should be at about 2cm

  • Rise or fall will only be about 1 to 1.5 cm

  • Looked at past patients and calculated an average

• Like the pump/vacuum idea and circuit

• Will start looking into possible bed placements of the control housing for the patient

  • Thinks PCB is a necessary step for a robust final product

Instructor Feedback from Last Week:

• Look into PCB design further - learn through tutorials and help from Steve Roberts

• Check with the sponsor to see if they have access to the ISO standards to make sure we meet all health and safety criteria for the project

Current Concerns:

• Still need to determine the feasibility of our new FSR and 3D print the “puck” design

  • Feasible to print this?

Next Steps:

• Set up air flow circuit and make sure all elements work together (Karie)

• Solve the motor driving problem and set up a new circuit using transistors (Ryan)

• Determine FSR feasibility with the design of the sensor puck (Philip)

• Prototype new designs of the balloon so that we have many options to test out (Udai)

Design Proposal Presentation

Direct link to pdf: https://drive.google.com/file/d/13odhRsEL8tHNxRc-AI21i1fpCgY8S0r8/view?usp=sharing