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모바일 전자 기기용 자동초점 구동기 낙하충격 손상평가
| DC Field | Value | Language |
|---|---|---|
| dc.contributor.advisor | 이문구 | - |
| dc.contributor.author | 성연욱 | - |
| dc.date.accessioned | 2019-10-21T07:18:40Z | - |
| dc.date.available | 2019-10-21T07:18:40Z | - |
| dc.date.issued | 2011-08 | - |
| dc.identifier.other | 11923 | - |
| dc.identifier.uri | https://dspace.ajou.ac.kr/handle/2018.oak/18034 | - |
| dc.description | 학위논문(석사)아주대학교 일반대학원 :기계공학과,2011. 8 | - |
| dc.description.tableofcontents | Table of Contens i List of Figures iv List of Tables vii 1. 서 론 １ 1.1 연구배경 및 현황 １ 1.2 연구 동향 ５ 1.3 연구목적 ６ 1.4 연구의 기대효과 ７ 2. 배경이론 ８ 2.1 자동초점 구동방법의 종류 ８ 2.1.1 AUTOMATIC FOCUSING USING INFRARED ８ 2.1.2 CONTRAST DETECTION FOR AUTOMATIC FOCUSING ８ 2.1.2 PHASE DETECTION FOR AUTOMATIC FOCUSING １０ 2.2 구동 액추에이터 １３ 2.3 자기력 이론 １７ 2.4 충격 접촉 이론 ２０ 2.5 VON MISES 항복 이론 ２７ 2.6 유한요소법의 접촉 알고리즘 ３０ 3. 낙하가속도 실험 ３２ 3.1 낙하 가속도 실험조건 ３２ 3.2 낙하 가속도 실험 결과 ３６ 4. 마이크로 인장 시험 ３８ 4.1 마이크로 인장 시험 시편 규격 ３８ 4.2 마이크로 인장 시험 시편 규격 ４２ 5. 유한요소해석 ４６ 5.1 유한요소 모델링 ４６ 5.2 해석 방법 ５１ 5.3 ACCELEROMETER 결과 ５３ 5.4 반복충격 평가 ５７ 5.5 VON MISSES 결과 ５８ 5.6 DIVIATION 결과 ６４ 5.7 DIVIATION 측정 ７３ 6. 결론 및 향후계획 ８１ 6.1 결 론 ８１ 6.2 향후계획 ８３ Reference 8 4 Abstract 8 8 | - |
| dc.language.iso | kor | - |
| dc.publisher | The Graduate School, Ajou University | - |
| dc.rights | 아주대학교 논문은 저작권에 의해 보호받습니다. | - |
| dc.title | 모바일 전자 기기용 자동초점 구동기 낙하충격 손상평가 | - |
| dc.title.alternative | Yeon-wook Sung | - |
| dc.type | Thesis | - |
| dc.contributor.affiliation | 아주대학교 일반대학원 | - |
| dc.contributor.alternativeName | Yeon-wook Sung | - |
| dc.contributor.department | 일반대학원 기계공학과 | - |
| dc.date.awarded | 2011. 8 | - |
| dc.description.degree | Master | - |
| dc.identifier.localId | 569676 | - |
| dc.identifier.url | http://dcoll.ajou.ac.kr:9080/dcollection/jsp/common/DcLoOrgPer.jsp?sItemId=000000011923 | - |
| dc.subject.keyword | impact analysis | - |
| dc.subject.keyword | AF | - |
| dc.subject.keyword | automatic focusing | - |
| dc.subject.keyword | 충격 | - |
| dc.description.alternativeAbstract | In order to meet the recent needs of portability and downsizing, the robustness against daily impact has become the important performance in mobile electronics. Most parts of the mobile electronic device should pass the drop test in which they fall from 1.5 m above the ground. The purpose of this test is to secure the device from the case when it slips down user’s hand while talking on the device. This paper studies the drop test for an automatic focusing (AF) actuator of a camera module in the Mobile electronic device. The module is composed of voice coil motor (VCM) as an actuator and a leaf spring as a guide and suspension. While the conventional drop test has been carried out after fabricating the real AF actuator, this paper proposes a model which can simulate the drop test based on finite element analysis. In order to verify the model, the acceleration after the drop was compared and then we conclude the model is feasible. With this model, we investigate the stress acting on the clamping and the curved parts of leaf spring. In respect of Von Mises criterion the AF actuator does not undergo serious stress. Despite of the results, the deviation of lens center occurs due to permanent deformation of leaf spring. The FE model shows possibility of the deviation; however, the author could not carry out sufficient simulations. The possibility is also revealed when the leaf springs are investigated by 3D profiler. This requires a further study. This method is useful not only to design and modify AF actuator without manufacturing the real product, but also to save time and cost during the development of new products. | - |
- Appears in Collections:
- Graduate School of Ajou University > Department of Mechanical Engineering > 3. Theses(Master)
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