Download Design Guide

Workshop
Designing a Batteryless Cell Phone
Introduction
Dr. Farid Farahmand
9/26/2006
Overview
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Welcome!
What it means to be here!
Design process
Designing a batteryless cell phone
Deadlines and rules
References
Why Participate?
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Become a professional
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A real-world project can provide a transition from being a
student to becoming a professional
Be recognized by the Dean’s office and offer university
representatives
Use this ass your capstone project
Gain a chance to improve your knowledge and skills
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Learn to apply your knowledge to real problems
Have the opportunity to work in a team and learn from your peers
Challenge your skills and abilities
Learn how to take responsibility for your successes and mistakes
Understand a real design cycle
Add this experience to your resume
Employers hire students with real working skills!
Why Participate?
Just to win $1500!
Design Process
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Design is an iterative process with iterative phases
Methodology: Learning about the problem and picking a solution
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Decision-making and planning
Problem solving
Objective: Creation of something new having a physical reality
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Functional
Safe
Reliable
Competitive
Usable
Manufacturability
Marketable
Learn how to design (subject to certain
problem solving constraints) a
component (system or process) that
performs a specific task (subject to
certain solution constraints) optimally.
Designers’ Personal Resources
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Creativity and talent
Problem-solving ability
Effective communication
Willingness to learn
Ur
Here!
Science
(Explaining what is)
Engineering
(Creating what never was)
Mathematics
Starting a Design Process
To optimize we use mathematical
models to describe the physical
attributes and characteristics
Necessity is the mother of all
inventions – what is wrong with
existing solutions
What are you going to do about it?
Invention of the concept /
comparing the competitive
solutions / finding the most
competitive approach
Evaluation is proof of concept /
prototyping
Necessity is the mother of all
inventions – what is wrong with
existing solutions
If you cannot explain it, it does not
exist!
Starting a Design Process
Design
Considerations
Design Tools
& Resources
YOU!
Characteristics that influence the design
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Reliability
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Manufacturability
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Weight
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Cost
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Lifetime
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Safety
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Functionality and usability
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Style
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Shape and size
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Systematic
Design Approach
Characterizing the behavior of the design
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- Matlab
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- Labview
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- Books and online resources
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- CAD tools
Understanding the problem
Identifying what are known and unknown
Stating all decisions
Analyzing the problem
Evaluating the solution
Presenting the solution
1. Identify need and define problem.
Design Process
2. Assemble design team.
3. Identify constraints and criteria for success.
4. Search for potential solutions.
5. Analyze potential solutions.
6. Decide on best solution.
7. Document and communicate to management.
8. Build.
9. Evaluate
Systematic Design Approach
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Understanding the problem
Identifying what are known and unknown
Stating all decisions
Analyzing the problem
Evaluating the solution
Presenting the solution
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Systematic Design Approach
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Understanding the problem
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Understanding the
problem
Identifying what are
known and unknown
Stating all decisions
Analyzing the problem
Evaluating the solution
Presenting the
solution
What is the nature of the problem
Identifying what are known and unknown
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How the cell phone is powered
Testing characteristics of the cell phone
Size of the design and its interface to the phone
Power requirement of the phone
Cost constraints
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Systematic Design Approach
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Analyzing the problem
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Basic functional blocks of the design
Check advantages and disadvantages of each possible
solutions
Verify each solution using simulation and modeling
Evaluating the solution
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Prototyping
Presenting the solution
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Explain what you did!
Understanding the
problem
Identifying what are
known and unknown
Stating all decisions
Analyzing the problem
Evaluating the solution
Presenting the
solution
Design Process
Cell Phone Requirements
Power and
Voltage
Requirements
Electrical
Electrical
Design
Size and shape
requirements
Mechanical
Evaluating mechanical
requirement
Testing the
design
Ensuring the
electrical can
properly fit
Testing the
Design
Modify the
design as
needed
Documenting
the results
Documenting the
Design
Design Challenges
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Which technology to choose
Scaling the design to the proper size
Meeting proper power and voltage
requirement
Storing sufficient energy
Cell Phone Characterization
Cell Phone
Current
Computer
Voltage
Power Source
Test Condition
Voltage/Current
Power
Current
Power
Time
Time
Receive a call
Dial a number
30 second conversation
Turn on
Basic Design Solution
Energy
Generator
Electrical
Storage
Cell
Phone
Solar-based
Mechanical-based
Chemical-based
Capacitors
Active devices
Any cell phone
Basic Design Solution
Examples:
Shake-and-talk
Blow-and-talk
Move-and-talk
Crank-and-talk
Energy
Generator
Electrical
Storage
Cell
Phone
Solar-based
Mechanical-based
Chemical-based
Capacitors
Active devices
Any cell phone
Basic Design Solution
Characterization:
Power generated
Current supply
Voltage supply
Reliability
Size / Weight / etc.
Characterization:
Storage capacity
Lifetime
Charging and
discharging time
Min/Max Charge
Energy
Generator
Electrical
Storage
Cell
Phone
Solar-based
Mechanical-based
Chemical-based
Capacitors
Active devices
Any cell phone
Now What?
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Anyone can participate
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Put a team together and pick a cool name!
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Signup the registration sheet
Attend the workshops
Check the web page for updates
Let me know what you need
Prepare a schedule indicating your projected times to
complete each Milestone
You can start your own web page
Attend the workshops
Remember the deadlines
Finalists
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The best design selection criteria
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Reliability: Always works!
Compatibility: Used for different phones
Lifetime: Storage capacity
Durability: Handing unexpected
Completeness: Create a poster
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Remember:
Anyone with a prototype
is a winner!
Describe the theory
Show the simulation results
Show the test results
Explain future works and improvements
What Else?
Any Questions?