Development of three-dimensional position sensor for digestive tract measurement

Takashi Nagaoka, Sunao Takeda, Akihiko Uchiyama

研究成果: Article査読

抄録

We developed three-dimensional position sensor that can measure the position of capsule in the digestive tract. For the purpose of inspecting new position measurement algorithm, we first developed prototype wired capsule-type sensor that is capable of being swallowed. Our ultimate goal will be to develop wireless sensor. The current sensor is applicable for medical capsule devices, such as capsule endoscope. The position of the sensor was detected using mutual induction. In order to maintain the electromotive force induced at secondary coils in the sensor constant, the current flowing into the primary coil was regulated using feedback control. The position of the sensor was measured stably using the feedback control, even when the sensor was relatively far from the primary coil. The position of the sensor was determined from the current flowing into the primary coil. As result of evaluating the accuracy of the wired sensor in vitro, the error was 2.90±2.10mm (Ave.±S.D.) in range of up to from the magnetic field generator. Moreover, using new position compensation algorithm, we were able to remove distortion caused by the magnetic field.

本文言語English
ページ(範囲)239-249
ページ数11
ジャーナルJapanese Journal of Medical Electronics and Biological Engineering
41
4
出版ステータスPublished - 2003

ASJC Scopus subject areas

  • 生体医工学

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