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- W1981014169 abstract "This paper proposes a new sensing method that can measure three-dimensional position inside a living body, using a magnetic field. This method is applicable to medical capsule devices, such as the capsule endoscope. The mutual induction phenomenon is used for position measurement. In order to hold constant the induced electromotive force that occurs in the secondary coil, we apply feedback control to the alternating current flowing into the primary coil. This method enables stable measurement of sensor position, even if the sensor exists relatively far from the primary coils. The position of the sensor is measured by calculating six formulas using Newton’s method. The relationship between the induced electromotive force and the theoretical value of the magnetic field is determined in advance. Sensor in vitro accuracy was verified. For distances of less than 300 mm from the sensor to the magnetic field generator, the distance error was less than 7 mm. Although a wireless sensor would be ideal, the present sensor is connected to the computer through a thin cable. Development of wireless sensor should be the next research subject." @default.
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- W1981014169 date "2004-01-01" @default.
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- W1981014169 title "Fabrication of Three-Dimensional Position-Measurement Sensor Using a Single-Axis Coil" @default.
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- W1981014169 doi "https://doi.org/10.3379/jmsjmag.28.97" @default.
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