Figure 2
From: Localization accuracy of multiple magnets in a myokinetic control interface
Results from two representative configurations (θ = 40°, upper panels, and θ = 27°, lower panels—N45 grade magnets). (a) Spatial distribution of the magnetic field z-component (Bz) measured by the sensor plane (S∞); insets: Bz for all magnet grades measured for y = 0 cm. The magnetic field appears as the linear combination of bell-shaped waveforms, each one generated by one magnet. For θ = 40°, the peaks of the bells are always clearly distinguishable, while the ripple becomes less evident for θ = 27°. (b) Bz gradient (along x) on S∞; insets: Bz gradient (along x) for all magnet grades measured for y = 0 cm. Peaks corresponding to different magnets proved more (less) evident for θ = 40° (27°). (c) Contour plots displaying position (on the left) and orientation (on the right) \({e}_{m}\) and \({e}_{ct}\), for all sensing areas and all MMs (95th percentile). Good accuracies were achieved for θ = 40°, vice-versa errors increased for θ = 27°. In both cases, \({e}_{ct}\) decreased when moving from the central towards external MMs.
