자계 센서를 이용한 캡슐형 내시경의 위치 측정

다국어 초록 (Multilingual Abstract)

Development of a locomotive mechanism for the capsule type endoscopes will largely enhance their ability to diagnose disease of digestive organs. As a part of it, there should be provided a detection device of their position in human organs for the purpose of observation and motion control. In this paper, a permanent magnet outside human body was employed to project magnetic field on a capsule type endoscope, while its position dependent flux density was measured by three hall-effect sensors which were orthogonaIly instalIed inside the capsule. In order to detect the 2-D position data of the capsule with three haIl-effect sensors including the roIl, pitch and yaw angle, the permanent magnet was extra translated during the measurement. In this way, the 2-D coordinates and three rotation angles of a capsule endoscope on the same motion plane with the permanent magnet could be detected. The working principle and performance test results of the capsule position detection device were introduced in this paper showing that they could be also applied to 6-DOF position detection.

참고문헌 (Reference)

1 Furlani, "Permanent magnet and electro- mechanical devices" Academic press 2001.

2 Yabukami, "Motion capture system of magnetic markers using three-axial magnetic field sensor" 36 (36): 3646-3648, 2000.

3 Prakash, "Localization of a magnetic marker for GI mobility studies an in vitro feasibility study ; Proceedings of the 19th Annual Int Conf of the IEEE EMBS" 2394-2397, 1997.

4 Hong, "Influence of dither motion on the friction coefficient of a capsule-type endoscope" Journal of the KSPE 22 (22): 57-63, 2005.

5 Kirsch, "Errors in systems using magnetic fields to locate object" 326-,

6 Nagaoka, "Development of a small wireless position sensor for medical capsule devices ; Proceedings of the 26th Annual Int Conf of the IEEE EMBS" 2137-2140, 2004.

7 Wang, "A low-cost tracking method based on magnetic marker for capsule endoscope Proceedings of Int. Conf. on Information Acquisition" 524-526, 2004.