Motion capture system of magnetic markers using three-axial magnetic fieldsensor

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 positio n 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, Th e most common error source is cross talk between the cores of three-axial s ensors.