P18325: Team ABC's
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Detailed Design

Table of Contents

Instead of the standard Detailed Design, Team P18325 used MSD I Phase IV to complete valuable Human Centered Design research.

Team Vision for Detailed Design Phase

Best Case Scenario (Optimistic)

The team builds a working and functioning device that cleans, sterilizes, and dries the breast pump parts within 30 minutes. The functions are independent and the system is fully integrated. The prototype will also include all of the findings given through the Human Centered Design research done during MSD I & Summer. The system will also meet all the engineering and customer requirements assigned for the development of the machine. The sanitation levels will meet all the ISO, FDA, and CDC requirements as well.

Electrically, the system will have LED lights that will display when the device is running. The onboard microcontroller receive the user input, use relays to switch the ultrasonic transducer and UV lights on and off, and controls the indicators. Mechanically the system will have a contained, working ultrasonic cleaner, rinser, and drying system. The water will be efficiently transported from the reservoir to the cleaning basin and back. The breast pump parts will be reliably cleaned, rinsed, dried and sterilized according to standards.

Moderate Case Scenario (Middle)

The team will have a working system with some functions but it will not be fully integrated. For example: the machine will clean but not clean and sterilize automatically for example. Not all of the customer and engineering requirements will be met. In this scenario the sanitation standards will still be met since the system can operate individually.

Electrically the system will have all the working functions in regards with the ultrasonic transducers and UV lights working together being switched by microcontroller by way of relays. Mechanically, the systems all work however not all of them will be able to operate in one container. The rinsing and drying systems, for example, may not be fully integrated with the outer casing while the cleaning and sterilization systems are.

Worst Case Scenario (Conservative)

The team will have different systems that aren’t fully functional and not integrated. We will have a design and/or almost built system that might clean, sterilize, or dry. These system will not perform under the desired cycle time and might not meet all the engineering and customer requirements like footprint.

Electrically the functions will not work at all. The UV lights and transducers will not work together and if the devices work they will not be efficient. Mechanically, all of the systems perform to their expected function. None of the systems, however, are integrated with each other. They can all perform their function optimally, they just must be activated using a new set of inputs (the water does not fully flow from start to finish.)

Human Centered Design and Prototyping

User Interface

Purpose

Different Mock-up’s were created for different User interfaces. Each interface has dials and a button and then either one has LED’s or an LCD. These combinations are not limited and therefore can be changed after feedback from User’s.
User Interface Mockup - Dial with Button and LEDs

User Interface Mockup - Dial with Button and LEDs

User Interface Mockup - Dial with Button and LCD screen

User Interface Mockup - Dial with Button and LCD screen

Conclusion

Looking to hear back from the Users feedback about which design is best and why through the user Survey and interactions.

Display

Different Display’s were looked at and below are the given designs from current models on the market that are related to baby products. If there is a certain desire to follow one of these models displays then design consideration will be considered.

A team field trip was taken to Buy Buy Baby to look at existing baby bottle cleaning/sterilizing products. Existing designs were taken into account when coming up with our own designs for both user interface and casing design. Pictures from the excursion can be found here

Drawings, Schematics, Flow Charts, Simulations

Describe your design in enough detail for someone else to recreate it. Have you included assembly plans and user manuals? Your team may want to create separate nodes and directories within the Detailed Design Documents directory for CAD, schematics, or software

Mechanical

Water Estimate

Water Estimate

Live document can be found here.

Electrical

KiCad System Wiring

KiCad System Wiring

Bill of Material (BOM)

Risk Assessment

Design Review Materials

Include links to:

Plans for next phase

Team three week plan

Individual Plans:


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