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. 2016 Jan 18:9:27-32.
doi: 10.2147/MDER.S93168. eCollection 2016.

Experimental measurement on movement of spiral-type capsule endoscope

Wanan Yang  1 , Houde Dai  2 , Yong He  1 , Fengqing Qin  1
Affiliations

Experimental measurement on movement of spiral-type capsule endoscope

Wanan Yang et al. Med Devices (Auckl). .

Abstract

Wireless capsule endoscope achieved great success, however, the maneuvering of wireless capsule endoscope is challenging at present. A magnetic driving instrument, including two bar magnets, a stepper motor, a motor driver, a motor controller, and a power supplier, was developed to generate rotational magnetic fields. Permanent magnet ring, magnetized as S and N poles radially and mounted spiral structure on the surface, acted as a capsule. The maximum torque passing to the capsule, rotational synchronization of capsule and motor, and the translational speed of capsule, were measured in ex vivo porcine large intestine. The experimental results illustrate that the rotational movement of the spiral-type capsule in the intestine is feasible and the cost of the magnetic driving equipment is low. As a result, the solution is promising in the future controllability.

Keywords: magnet ring; magnetic driving; spiral structure; torque; wireless capsule endoscope.

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Figures

Figure 1
Figure 1
Poles of magnet ring (A) and fabricated capsules (B). Abbreviations: cap, capsule; N, north; S, south.
Figure 2
Figure 2
General view of magnetic driving instrument.
Figure 3
Figure 3
The torque measurement setup. Abbreviations: PC, personal computer; CB-204, cable-204.
Figure 4
Figure 4
The torque measurement.
Figure 5
Figure 5
Measurement setup of rotation synchronization of capsule and stepper motor.
Figure 6
Figure 6
The measurement of rotation synchronization of capsule and stepper motor. Abbreviations: rpm, revolutions per minute; cap, capsule.
Figure 7
Figure 7
Measurement setup of translational motion time.
Figure 8
Figure 8
Translational velocity of capsules under different rotation speed. Abbreviations: rpm, revolutions per minute; cap, capsule.
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