Details

Autor(en) / Beteiligte

• Pan, Donghua
• Lin, Shengxin
• Jin, Yinxi
• Wang, Jinting
• Jin, Chongyu
• Wang, Yiding
• Wang, Lei
• Li, Liyi

Titel

Avoidance Method of Magnetic Target Positioning-Inaccuracy-Area

Ist Teil von

• IEEE transactions on instrumentation and measurement, 2024-01, Vol.73, p.1-9

Ort / Verlag

IEEE

Erscheinungsjahr

2024

Link zum Volltext

• IEEE_Xplore

Quelle

IEEE Xplore Digital Library

Beschreibungen/Notizen

• Magnetic positioning technology is safe, practical, and cost-effective and is getting increasingly emphasized in many fields such as biomedicine and geophysics. However, magnetic positioning methods have a positioning-inaccuracy-area (positioning error is significantly greater than that in the adjacent area). This article establishes an omni-posture error model to explore the variation law of the positioning error and finds that the included angle <inline-formula> <tex-math notation="LaTeX">\varphi </tex-math></inline-formula> between the magnetic moment vector and the position vector determines the distribution of the positioning error. Using wireless communication to send commands and adjusting the current vector to change <inline-formula> <tex-math notation="LaTeX">\varphi </tex-math></inline-formula>, we propose an avoidance method of positioning-inaccuracy-area (AMP). Simulation results show that when using the AMP to track a wireless capsule endoscope (WCE) with an arbitrary posture, the positioning error is 5.5 mm and the orientation error is 1.64°. The experimental results in a magnetically shielded room (MSR) show that the positioning error of the AMP is 12 mm, which reduces the positioning error before avoidance by 95.5%. The simulation and experimental results both prove that the AMP can effectively avoid the positioning-inaccuracy-area of the magnetic positioning method, thereby improving the positioning accuracy.