cool - 2010

''Ultra wideband (WB) signals have been used for decades in geophysical characteristic applications. When UWB signals are employed in geophysical analysis systems, the sensor is moved in order to detect and map underground stationary objects.

New developments in UWB products reverse the "moving of the sensor" application. Rather than moving the sensor over terrain, the sensor is positioned beneath or within terrain in a stationary position, enabling the sensor to "see" the motion of objects. Further, as in geophysical applications where echoes from targets that arrive a different times help define the distance of an object from the moving sensor, in this reversal of the process, these same echoes can aid in determining the distance from the stationary sensor of a moving object and the rate of movement or "velocity" of that object towards the sensor. Lastly, UWB technology provides improved motion resolution over that of a single frequency transmission like microwave, enabling measurement of subject mass.

So this "reverse" application of UWB technology takes motion detection to a new level, enabling a motion detection product that can see through barriers like walls, roadbeds, sidewalks or ceilings. Further the measuring of subject mass eliminates false detections of falling debris or animals in outdoor applications. Like most security technologies UWB sensor products available today can integrate with access control systems, day and night vision cameras with PTZ capabilities, alarming systems and so forth. This enables security personnel to determine appropriate actions based on the combined understanding of the fact detection has occurred, the size of the detected subject and the location and velocity of that subject from the object or location being monitored.''

http://www.security-technologynews.com/article/monumental-security-ultra-wideband-security-detection-systems.html

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