product design portfolio
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JAN 2012 AUG 2012 MAY 2013 JULY 2013
HELIUM CANNON
HUMANITARIAN
COOKSTOVE
SMOOTHIE MACHINE
PHOTOGRAPHIC
SCANNER
problem
There is a need for safer alternatives to
police and military’s rubber bullets
CANNON STOVE SMOOTHIE SCANNER
objectiveDesign a cannon to test
rubber bullet alternatives
My project focus:
Technical Design and
Manufacturing
Ballistics Lab
UC Berkeley
Ask
Imagine
Plan
Create
Improve
Soft Bullet>100 MPH
High Pressure System
challenges
Navier-Stokes Design Principles
• Minimize Internal Volume
• Minimize Internal Bends
• Minimize Gas Viscosity
Bra
ins
torm
5 foot long 4130 Steel
barrel to maximize
energy transfer
6061 T6 Aluminum for
manufacturability and
great strength to cost
Quick, Bolt-Action Style Loading
Linear design to
encourage smooth
streamlines.09 second
valve opening
time
3000 PSI Helium
to reduce fluid
viscosity
150 ft/s soft
bullets distribute
impact force
Small internal volume
to minimize energy
loss
solution
problem
Indoor air pollution is the 4th worst risk factor for disease in developing countries.
CANNON STOVE SMOOTHIE SCANNER
objectiveImprove cookstoves to
reduce smoke inside rural
Bolivian kitchens.
My project focus:
Humanitarian Design
CAD
Ask
Imagine
Plan
Create
Improve
Cedesol, NGO
Bolivia
Design Difficult to Modify
Adding to design easier than modifying
Lack of Testing Resources
Testing shows de-centralized heating
Very few resources available
Difficult to implementdesign changes with existing assembly line
challenge
Plasma cutter
assembly line
Makeshift
“smoke wand”
solution
Find maximum dimensions
Create design modifications
Create full CAD Distribute designs worldwide
New Hoop
Maintains assembly line
Concentrates heat
Channels airflow
problem
There is a need for quick and
healthy alternatives to delicious,
delicious ice cream.
CANNON STOVE SMOOTHIE SCANNER
Create an automated smoothie machine that uses semi-frozen fruit
My project focus:Fruit dispenser design and manufacturing
Mechatronics Course
UC Berkeley
objective
Ask
Imagine
Plan
Create
Improve
challenges
Dispensing Ideas Considered
Secondary Responsibilities
Non-uniform
material
Many subsystems
to integrate
α β
Sliding Box
dispenses equal
amounts of fruit
Automating Mechanisms
Dispensing Liquid
Covering Blender
1. Main wheel
rotates fruit tubes
2. Fruit dispensers
opens and closes
3. Liquid dispenser
adds milk4. Lid seals blender
5. Blender turns on
6. Smoothie dispenses
and blender self-washes
solution
Our survey results from Darfur are often blurry or incomplete and were unreadable back at home.
problem
CANNON STOVE SMOOTHIE SCANNER
objectiveCreate a cell phone
“scanner” that ensures
readable pictures
My project focus:
User-Centric Design
Humanitarian Design
Ask
Imagine
Plan
Create
Improve
Darfur Stoves Group
Lawrence Berkeley Lab
User Needs
Must be:
Benchmarking:
Bra
ins
torm
challenges
How do people transport things?
Applicable
Co
st Effective
Locally repairable Durable
User FriendlyIntuitive
Intuitive User friendly
Locally repairable Durable
solution
Swivel Clip to Secure Different Paper Sizes
Guide rails to ensure paper alignment
Groove to lift and lower the stand quickly
Press-fit phone holder
with charging port
Additional Projects
DIY Wine Bottle Cutter
Nicaraguan Stove Design
Cheese and Cracker Board
ryanjliu@gmail.com
925-285-7586
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