Abstract: In order to solve the test joint movement parameters of the human body in
three-dimensional space, this paper puts forward a kind of independent design BTViewer six degrees
of freedom motion parameters testing system of the human body. Based on the inertial sensor tracking
technology, the working process of the overall design of the system platform, implement the
algorithms at the same time. In order to reduce error and drift phenomenon, this experiment adopts
the integrated three-axis accelerometer, the module LSM303DLH three-axis magnetometer and
dynamic triaxial gyro samples data, transmitted to the computer via a wireless device, at the same
time, the efficient of the collected data preprocessing, and complementary to the original data parsed
into actual data after filtering, six degrees of freedom motion parameters accurately by the human
body. Finally, using Qt integration of OpenGL to curve and 3D visualization display module. The
design of the experiment show that the system has reached the expected requirement, 6 degree of
freedom motion parameters can well track the human body.

Key words: 6 degrees of freedom, inertial sensor, complementary filter, visual display