Localization for robotic capsule looped by axially magnetized permanent-magnet ring based on hybrid strategy.
To actively maneuver a robotic capsule for interactive diagnosis in the gastrointestinal tract, visualizing accurate position and orientation of the capsule when it moves in the gastrointestinal tract is essential. A possible method that encloses the circuits, batteries, imaging device, etc into the capsule looped by an axially magnetized permanent-magnet ring is proposed. Based on expression of the axially magnetized permanent-magnet ring's magnetic fields, a localization and orientation model was established. An improved hybrid strategy that combines the advantages of particle-swarm optimization, clone algorithm, and the Levenberg-Marquardt algorithm was found to solve the model. Experiments showed that the hybrid strategy has good accuracy, convergence, and real time performance.
School of Computer and Information Engineering, Yibin University, Yibin, People's Republic of China.
Wanan
W
Yang
Computer Science and Technology Institute, Yibin University, Yibin, People's Republic of China.
Yan
Y
Li
School of Computer and Information Engineering, Yibin University, Yibin, People's Republic of China.
Fengqing
F
Qin
hybrid strategy; localization; permanent-magnet ring; robotic capsule