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이 논문의 연구 히스토리 (2)

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A wireless capsule endoscope, M2A, has been developed to replace the conventional endoscope. However, the commercialized capsule endoscope moves passively by peristaltic waves (and the gravity), which has some limitations for doctors to diagnose more thoroughly and actively. In order to solve this problem, a locomotive mechanism is proposed for wireless capsule endoscopes. Based on the tests of various actuators, a piezo actuator is selected as a micro actuator for capsule endoscope. Piezo actuators are known to have limited displacement with high voltage supply. In order to overcome the limitation of common Piezo actuator, the impact based piezo actuator, is developed to realize long stroke up 11㎜. Moreover, clampers mimicked the claw of a insect are employed. A prototype of an earthworm-like locomotive mechanism with an impact based piezo actuator and engraved clampers was developed. It has 15 ㎜ in diameter and 30㎜ under retraction stage and 41 ㎜ under elongation stage in total length. Hollow space is allocated to comprise essential endoscope components such as a camera, a communication module, bio sensors, and a battery. For the feasibility test of proposed locomotive mechanism, a series of experiments were carried out including invitro tests. Based on results of the experiments, we conclude that the proposed locomotive mechanism is effective to be used for micro capsule endoscopes.

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Abstract
1. 서론
2. 임팩트 방식의 압전 구동기
3. 이동 메커니즘의 설계
4. 로봇의 제작과 실험 장치
5. 실험결과
6. 결론
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UCI(KEPA) : I410-ECN-0101-2009-550-016054646