Workshop Designing a Batteryless Cell Phone Introduction Dr. Farid Farahmand 9/26/2006.

Workshop Designing a Batteryless Cell Phone

Introduction

Dr. Farid Farahmand

9/26/2006

Overview

Welcome! What it means to be here! Design process Designing a batteryless cell phone Deadlines and rules References

Why Participate?

Become a professional– 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

– 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

Design is an iterative process with iterative phases Methodology: Learning about the problem and picking a solution

– Decision-making and planning – Problem solving

Objective: Creation of something new having a physical reality– 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

Creativity and talent Problem-solving ability Effective communication Willingness to learn

Science (Explaining what is)

Engineering (Creating what never was)

Mathematics

U rHere!

Starting a Design Process

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

Necessity is the mother of all inventions – what is wrong with existing solutions

To optimize we use mathematical models to describe the physical attributes and characteristics

Evaluation is proof of concept / prototyping

If you cannot explain it, it does not exist!

Starting a Design Process

DesignConsiderations

Design Tools & Resources

Systematic Design Approach

YOU!

Understanding the problem Identifying what are known and

unknown Stating all decisions Analyzing the problem Evaluating the solution Presenting the solution

Characteristics that influence the design Reliability Manufacturability Weight Cost Lifetime Safety Functionality and usability Style Shape and size

Characterizing the behavior of the design - Matlab - Labview - Books and online resources - CAD tools

1. Identify need and define problem.

2. Assemble design team.

3. Identify constraints and criteria for success.

5. Analyze potential solutions.

6. Decide on best solution.

7. Document and communicate to management.

8. Build.

9. Evaluate

4. Search for potential solutions.

Design Process

Systematic Design Approach

Understanding the problem Identifying what are known and unknown Stating all decisions Analyzing the problem Evaluating the solution Presenting the solution

Systematic Design Approach

Understanding the problem – What is the nature of the problem

Identifying what are known and unknown– 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

Understanding the problem

Identifying what are known and unknown

Stating all decisions Analyzing the problem Evaluating the

solution Presenting the

solution

Systematic Design Approach

Analyzing the problem – Basic functional blocks of the design – Check advantages and disadvantages of each possible

solutions – Verify each solution using simulation and modeling

Evaluating the solution – Prototyping

Presenting the solution – 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

Electrical Mechanical

Electrical Design

Evaluating mechanical requirement

Testing the Design

Documenting the Design

Power and Voltage

Requirements

Size and shape requirements

Testing the design

Documenting the results

Cell Phone Requirements

Ensuring the electrical can

properly fit

Modify the design as

needed

Design Challenges

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

Power SourceVoltage

Current

Computer

Test Condition Voltage/Current Power

Receive a call    

Dial a number    

30 second conversation    

Turn on    

Time

Current

Time

Power

Basic Design Solution

Energy Generator

Electrical Storage

CellPhone

Solar-based Mechanical-based Chemical-based

Capacitors Active devices

Any cell phone

Basic Design Solution

Energy Generator

Electrical Storage

CellPhone

Solar-based Mechanical-based Chemical-based

Capacitors Active devices

Any cell phone

Examples: Shake-and-talkBlow-and-talkMove-and-talkCrank-and-talk

Basic Design Solution

Energy Generator

Electrical Storage

CellPhone

Solar-based Mechanical-based Chemical-based

Capacitors Active devices

Any cell phone

Characterization:Power generatedCurrent supply Voltage supplyReliability Size / Weight / etc.

Characterization:Storage capacityLifetimeCharging and discharging timeMin/Max Charge

Now What?

Anyone can participate– Signup the registration sheet – Attend the workshops – Check the web page for updates

Put a team together and pick a cool name! – 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

The best design selection criteria– Reliability: Always works!– Compatibility: Used for different phones– Lifetime: Storage capacity– Durability: Handing unexpected– Completeness: Create a poster

Describe the theory Show the simulation results Show the test results Explain future works and improvements

Remember:Anyone with a prototype

is a winner!

What Else?

Any Questions?