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ED 100 Mechanical energy harvesters for portable electronic devices Homework#2

Group B4-5a Dong- Kyeong Lee, Jisu Choi , Seoyun Yum, Na Than Jo, Eui Jae Yun , Khang June Lee. ED 100 Mechanical energy harvesters for portable electronic devices Homework#2. Stakeholder & Customer & User . Client: Someone who is telling us to carry out the design

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ED 100 Mechanical energy harvesters for portable electronic devices Homework#2

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  1. Group B4-5a Dong-Kyeong Lee, JisuChoi, Seoyun Yum, Na Than Jo, Eui Jae Yun, Khang June Lee ED 100 Mechanical energy harvesters for portable electronic devicesHomework#2

  2. Stakeholder & Customer & User • Client: Someone who is telling us to carry out the design • Customer: Someone who will purchase the design • User: Someone who will use the design

  3. Stakeholder & Customer & User • Our problem: To work on making energy harvesters for mobile phones. • Requirements to design and produce the energy harvesters may be improbable for the given • Time • Skills • Funds • Market

  4. Stakeholder & Customer & User

  5. Assigned tasks for each member • Interviewing group [carry out the interviews] (2~3people) • Surveying group [carry out the surveys] (3~4people) • Organizing group [organize the data and typing] • Research • Typing

  6. Survey & Interview Contents • Book light(survey) • MP3/Phone(survey) • Mechanisms of piezo-crystals and other materials to produce energy and about each of the devices(interview)

  7. Target for Survey & Interview Survey Interview • Kaist students • Other students in Korea, or overseas • Professors • Random individuals. • graduate students • TAs, PA • Professors in charge of mechatronics/mechanical/electrical/material engineering areas.

  8. Survey1 (Book light)

  9. Introduction • The survey is for the Freshman Design Course at Kaist. The project is to design energy harvesters for portable electronic devices. This survey will mainly concentrate on the portable device being book light.

  10. Book light: A device used to • Read texts with limited light source. • Energy efficient (LED lights) • Light and compact => transportation • Reading positions • Flexible

  11. Age • Under 15 • 15~20 • 20~25 • 25~30 • Over 30 • Have you ever used book light before • Yes • No • What kinds of characteristics do you look at for book lights? • DesignColor • Size • Mass • Price • Functions

  12. How big do you think they should be? • Size of a wallet • Size of university textbooks • Ordinary novel book size • Size of a bag • How long do you spend outside? (Walking outside) • Under 1hour • 1~2hours • 2~3hours • 3~4hours • Over 4hours

  13. Up to how much are you willing to pay? • Under \30,000 • \30,000~50,000 • \50,000~70,000 • \70,000~100,000 • \100,000~150,000 • Have you had an experience where you could not read due to lack of light? • Yes • No

  14. In what kind of environment do you read books? • Dark • Dim • Normal • Bright • Very Bright • For how long do you read books in a day? • Under 1hour • 1~2hours • 2~3hours • 3~4hours • Over 4hours • In which position do you like to read books? • Sitting • Lying • Standing

  15. Survey2 (Mobile Phone/MP3)

  16. Introduction • Mobile phone: A device used to • Make calls • Send text messages • Communicate with other people. • MP3: A device which allows the user to • Store • Listen to music and video.

  17. Age • Under 15 • 15~20 • 20~25 • 25~30 • Over 30Possess a mobile phone • Yes • No • Possess an MP3 or any other music players • Yes • No

  18. Which do you use more? • Mobile phone • MP3 • How long do you use a mobile phone a day? (any activity involving mobile phone) • Under 1hour • 1~2hours • 2~3hours • 3~4hours • Over 4hours

  19. How long do you use an MP3 a day? • Under 1hour • 1~2hours • 2~3hours • 3~4hours • Over 4hours • Did you have any situations where you had a problem due to the battery running out for the above devices? • Yes • No

  20. How much time do you spend a day to charge up your battery for the above device (The one you use more) • Under 1hour • 1~2hours • 2~3hours • 3~4hours • Over 4hours • If the device could charge by itself, how much more are you willing to pay when you are purchasing it? • Under \10,000 • \10,000~20,000 • \20,000~40,000 • \40,000~80,000 • \80,000~\10,000

  21. Which aspect of the mobile phone or mp3 do you look at when purchasing them? • Design • Size • Mass • Color • Function • Cost

  22. Interview Questions • Mechanism of piezoelectric materials • The amount of energy gained from the piezo • Applications of piezoelectric materials in our lives • Efficiency and cost • The way to store energy produced by piezo

  23. Methods to keep the brightness of the LED even • Whether the energy is enough for charging • Alternative energy source

  24. Homework #3 • Continue work • Survey • Interview (customer and expert) • Research

  25. Survey • More • Organize

  26. Interview/Research • Evaluate • Reference • Relevant

  27. Thank you

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