[Motion Analysis]

Measurement of marker displacements in (highspeed) videos and for vibration analysis.

Wiplash - Simulation of rear end collision

LIMtrack6D is used for the fully automatic evaluation of a wiplash test. A wiplash test simulates a rear-end collision and is used to assess the safety of seats according to NCAP.
By using the 6D marker and measuring the 3D coordinates with just one high-speed camera, the preparation time (camera alignment, etc.) and the movement analysis of the markers are significantly simplified compared to 2D marker tracking.
The application modules integrated in LIMtrack6D automatically calculate all relevant variables and their maximum values with their time from the start of the test: The relative speed between the dummy head and the sled as well as the rotation of the seat backrest are determined.

The video shows the wiplash test with animated result diagram.

Crash Test with high speed camera

2D motion analysis / motion tracking using LIMtrack from the high-speed video of a crash test.
2D coordinates, displacement, speed, etc. are measured by the automatic image analysis.
The integrated evaluation modules of LIMtrack calculate also distance changes, angles between markers, etc..

The video shows the horizontal and vertical displacement of the tracked marker together with their trajectory.

Table tennis ball

Motion analysis of a jumping table tennis ball with LIMtrack.The image sequence was recorded with a frame rate of 2kHz. The sub pixel accurate tracking also works stable on a rotating pattern.

The integrated analysis modules also allow to measure e.g. the velocity and acceleration of the ball.

The video shows the horizontal and vertical displacement of the tracked pattern (ball labelling). The marker and trajectory is visualized as overlay on the high speed camera image.

Number of Revolutions

LIMtrack is tracking of 3 Markers on a PC fan. The sequence was recorded by a high speed camera with 8kHz.

The number of revolutions is measured by the LIMtrack integrated analysis modules from the angle change between two points. This allows also to measure a tempral variation of the number of revolutions over time.

The visualization of the marker and their trajectories is switched on and off in the video.

Puncture Testing

LIMtrack. LIMtrack analysis module synchronizes and visualizes the time course of travel, speed and force measurement and automatically determines the penetration depth.

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