Motion capture system of magnetic markers using three-axial magnetic field sensor

We have developed a magnetic motion capture system consisting of up to two magnetic markers (Nd-Fe-B magnet) and four three-axial sensors. The position and orientation of the magnetic makers (dipole) are detected by measuring the magnetic field of markers, Position accuracy of one marker is about 3 mm when a marker is located 150 mm from a sensor, position accuracy of two markers is about 20 mm when the markers are located 150 mm from sensors, The most common error source is cross talk between the cores of three-axial sensors.