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Investigation of a cuboidal permanent magnet’s force exerted on a robotic capsule

Authors Yang W, Tang C, Qin F

Received 7 January 2014

Accepted for publication 6 March 2014

Published 18 August 2014 Volume 2014:7 Pages 283—289

DOI https://doi.org/10.2147/MDER.S60189

Checked for plagiarism Yes

Review by Single-blind

Peer reviewer comments 2


Wan’an Yang,1 Chengbing Tang,2 Fengqing Qin1

1School of Computer and Information Engineering, Yibin University, Yibin, 2CNPC Chuanqing Geophysical Prospecting Company Research Center Computer Department, Chengdu, Sichuan, People’s Republic of China

Abstract: To control and drive a robotic capsule accurately from outside a patient’s body, we present a schema in which the capsule enclosing the imaging device, circuits, batteries, etc is looped by a permanent magnet ring that acts as an actuator. A cuboidal permanent magnet situated outside the patient's body attracts or pushes the magnet ring from different directions to make the capsule move or rotate. A mathematic model of attractive or repulsive force that the cuboidal magnet exerts on the magnet ring is presented for accurate calculation of force. The experiments showed that the measuring force was in agreement with the theoretical one, and the relations between the dimensions of the cuboidal magnet and force are useful to produce a cuboidal magnet with optimal shape to get appropriate force.

Keywords: control and drive, robotic capsule, permanent magnet ring, optimal dimension, force model

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