Human Body Motion Sensing

Building on its strong background in navigation software design, NGC has developed in partnership with the Université de Sherbrooke a robust sensor calibration and fusion software suite for human body motion sensing applications.

In biomechanics research, researchers are interested in measuring with accuracy the motion of segments of the human body. Therefore, small sensor units combining accelerometers, gyrometers and magnetometers are installed at various locations on the human body to provide measurements over time.

Sensor Calibration & Fusion

NGC is currently collaborating with the Université de Sherbrooke on the development of sensor calibration and fusion software aiming at estimating with high accuracy the attitude of each of the sensor units. Biomechanics researchers in the medical field often have to operate in harsh environmental conditions where significant magnetic perturbations need to be dealt with. NGC’s sensor calibration and fusion software is designed to provide robustness against environmental perturbations and to maximise the attitude accuracy that can be obtained from the sensor units by fusing the information gathered from the different units.

Performance Validation

The performance of the sensor fusion software is verified in laboratory by comparing the attitude states estimated by the software against measurements provided by external high-accuracy optical measurement systems.

Inertial Measurement Units on Human Body Functional Diagram

Inertial Measurement Units on Human Body

Gimbal Bench Test Apparatus (A) General Overview (B) Payload.

Bench Test Apparatus (A) General Overview (B) Payload.  Courtesy of Dr. Patrick Boissy of the Université de Sherbrooke

Courtesy of Dr. Patrick Boissy of the Université de Sherbrooke

Courtesy of Dr. Patrick Boissy of the Université de Sherbrooke