[재료설계및제작] Luminella를 활용한 우산 설계

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[재료설계및제작] Luminella를 활용한 우산 설계에 대한 자료입니다.
목차
Contents

I. Executive summary

II. Acknowledgement

III. Introduction

IV. Design Constraints

V. Design Objectives

VI. Design Summary

VII. Discussion of Design Decisions

VIII. Design Evaluation

IX. Conclusions and Recommendations

X. References

XI. Appendices
본문내용
V. Design Constraints
Existing umbrella has played a role in the protection of mankind from the rain. In addition to this fundamental function, Luminella is a competitive factor as LEDs on the surface of umbrella emit light and thus reducing the accidents. For this facility, piezoelectric size should be approximately 3X5cm as users have to be able to fold and open an umbrella. Piezoelectric should be also coated with materials like vinyl to make it water proof. In order to turn on the LED, 3V of voltage and 20mA of current are needed, so generating enough power would be the most important issue. Furthermore, insulating current from the users would be essential. Lastly, the noticeable distance of LED when it is lighted should be measured. We also considered about types of LEDs, straight light direction LED, whole direction LED, and EL sheet. Each of these three types had advantages, however the main fact we considered was visibility. So before making prototype, we tested 3 types of LEDs by using general voltage. In addition, location of LEDs on umbrella was important. All of the top, middle, and bottom side of an umbrella were important considerations. Through many times of experiments, we decided to use one straight lighted LED, and it was located at the bottom since it would be more easily noticed.
In the process of making an actual product, new constraints were considered or were solved naturally. First of all, number of piezoelectric sheets were limited
참고문헌
XII. Reference

1) Daejeonilbo article “장마철 전조등 사고예방 지름길”, 2010.07.12, 22nd page, 대전서부경찰서 경비교통과 조언주

2) http://www.153pojang.com/front/php/category.php?cate_no=25 (액세스: 2010년 10월 10일).

3) http://www.google.co.kr/imglanding?q=piezoelectric&imgurl= http://www.imagesco.
com/articles/piezo/piezo00.jpg&imgrefurl=http://www.imagesco.com/articles/piezo/piezo00.html&h=408&w=400&sz=22&tbnid=RQPMSPi0wbexSM:&tbnh=125&tbnw=123&prev=/images%3Fq%3Dpiezoel (액세스: 2010년 10월 13일).

4) “PSKF.” 2004년 Jun월. http://www.psfk.com/2010/01/princeton-university-creates-new-piezoelectric-material.html (액세스: 2010년 10월 13일).

5) “wikipedia.” http://en.wikipedia.org/wiki/Piezoelectricity (액세스: 2010년 09월 29일).

6) 자동차안전기준 국제조화 연구보고서(주간주행등 분야), 자동차성능연구소(’08.7)