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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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group b4 5a dong kyeong lee jisu choi seoyun yum na than jo eui jae yun khang june lee
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 devicesHomework#2

stakeholder customer user
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
stakeholder customer user1
Stakeholder & Customer & User
  • Our problem : To work on making energy harvesters for mobile phones.
  • MP3 players and book lights : Requirements to design and produce the energy harvesters may be improbable for the given time, skills and funds. There may be a smaller market than the mobile phones and other devices
assigned tasks for each member1
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
survey interview contents
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)
target for survey interview
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 engineering/electrical engineering/material engineering areas.
introduction
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.
  • Book light: A device used to read books or other texts in environments with limited light source. This is relatively energy efficient as its main function is the lighting of LED lights in the device and as it is relatively light and compact in size, it is good for its transportation. Also due to its size it can be used in various reading positions making it flexible to carry around and use
slide13

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
slide14

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
slide15

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
slide16

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
introduction1
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 Mobile phone/MP3.
  • Mobile phone: A device used mainly to make calls or send text messages to communicate with other people.
  • MP3: A device which allows the user to store and listen to music and video.
slide19

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
slide20

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
slide21

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
slide22

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
slide23

Which aspect of the mobile phone or mp3 do you look at when purchasing them?

    • Design
    • Size
    • Mass
    • Color
    • Function
    • Cost
interview questions
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
slide25

Methods to keep the brightness of the LED even

  • Whether the energy is enough for charging