Technique correlates 3-D visualization & measurement of high-speed objects

JANUARY 7, 2008--Specialised Imaging (Herts, UK;
www.specialised-imaging.com) has announced the development of a novel technique that allows engineers, for the first time, to correlate high-speed video data with 3-D visualization and measurement. For high-speed imaging applications such as ballistic trajectory characterization, space re-entry vehicle development, and development of advanced munitions, engineers have traditionally used expensive Doppler radar equipment with sophisticated software, and on-board telemetry. While this methodology has provided useful analytical data it has not allowed visualization of the processes. The ability to correlate both analytical and visual data over a significant part of an object's flight, using the new Specialised Imaging technique, offers engineers a valuable new high-speed imaging tool.

Using a pair of Trajectory Tracker systems with new flight prediction algorithms and high-speed video cameras, engineers are can capture a sequence of images along an objects flight path and also obtain accurate 3-D measurements from those sequences. The Trajectory Tracker, with its flight prediction algorithms, is used to accurately track the object along a large portion of the flight path. This allows a very tight field of view which results in higher accuracy for the 3-D analysis. The 3-D analysis software allows for the calibration of the system and relating this to the image data streams from the high-speed video camera, produces simultaneous correlated video and measurement data. Proof-of-principle tests carried out by customers in the USA and Europe have shown that the reduction in time to obtain accurate 3-D (pitch & yaw) measurements is helping to accelerate the process of characterizing the flight behaviour of fast moving objects.

The Trajectory Tracker is a next-generation video tracking system offering high performance and ease of deployment on a sturdy, fully adjustable mount. The system provides consistent and accurate tracking of objects in flight using a computer controlled triggered rotating mirror positioned in front of a high-speed digital video camera.

To fully evaluate failure modes of high-speed objects, it is often necessary to observe their performance over a significant proportion of the trajectory. The Trajectory Tracker allows observations to be made of in flight behavior of high-speed objects over more than 100 m with a tracking accuracy of better than 0.2° over its full scan. The resulting slow motion record of an object in flight allows accurate diagnosis of events such as fin deployment, motor burn time, pitch, yaw, and spin rate.

For further information on using the Trajectory Tracker for 3-D visualization & measurement of high-speed objects in flight please contact Specialised Imaging at[email protected].