University of South Denmark large UAV laboratory assists academic research

 Large UAV laboratory

 Dammai University's UAV research technology is in the forefront of the world, and its UAS center focuses on research, education, innovation and cooperation in the field of UAV systems for the benefit of society. UAS testing center works closely with UAS denmark with advanced laboratories and 867 km2 uav dedicated airspace.

The OptiTrack motion capture system of the SDU UAS test center can track hundreds of markers in submillimeter accuracy in 665 cubic meters of volume. The system is installed in the hangar of the HCA airport near the Odense.

 Applicable cases

 Tracking and recording complex motion patterns of humans, drones and robots

 Synergy Research

 Research on Human / UAV Interaction

 Research and Application of Obstacle Avoidance

 Indoor navigation

 Calibration and validation of IMU sensors and navigation systems

The system consists of 14 OptiTrack Prime 17W cameras (now upgraded to PrimeX 22), mounted on a 12×12 m truss (heng) frame, The truss is suspended from the ceiling of the test center hangar. Installation area 144 square meters, A total effective capture volume of 665 cubic meters (11 x11x5.5 meters).

 Technical principles

 Motion capture technology uses high speed optical motion capture camera to track the labeled object with passive marking point (or with active marking point). After the passive marking point is illuminated by infrared light, the motion capture camera can be given spatial location feedback. in tracking mode, the camera uses a bandpass filter tuned to about 850 nm wavelengths to locate and track the markers.

 A passive marking point is an infrared reflection ball as small as 6.7 mm, illuminated and reflected by a high power infrared LED ring lamp emitted by a motion capture camera. The active marking point is 850 nm infrared LED lamp with different stroboscopic modes.

 In the central part of the tracked body, the tracking error is less than 0.5 mm. For the whole volume, the OptiTrack average tracking error can reach sub-millimeter level, and the system can track hundreds of markers at the same time.

The camera tracks the tag locally, sends the data to the workstation through Gigabit Ethernet, calculates and delivers the final tracking solution at the workstation, with an average delay of 4.5 milliseconds and a maximum of 360 Hz. OptiTrack system allows synchronization to the time code (timecode) of the motion capture camera to achieve consistency with the external application of a high-precision time axis. Motion patterns can be recorded, edited, played back or transferred to external applications and processors.

 the high-precision motion capture laboratory provides the conditions for in-depth research and the possibility of academic extension for the academic research of uavs. OptiTrack motion capture system is an important part of the HCA airport UAS test center facility. the laboratory is primarily user-oriented for companies, university researchers, phd students, and students from the SDU engineering college, greatly helping to improve project efficiency and research data accuracy.