The invention involves the usage of radio frequency, infrared, and low
frequency radio frequency to accurately track transponders (tags) that
are placed on objects. Transponders about the size of a small watch or a
badge that can be worn on a lapel or pocket are used. The transponders
are attached to staff, assets, and/or patients. Typically, ceiling
mounted readers are used. The system utilizes the readers to triangulate
the position of the transponders. The transponders can triangulate to a
resolution accuracy of a couple of inches to 10 feet within 4 seconds.
The system is also capable of triangulating the position of tags when
they are lost to IR using RF. The system works with vector floor plans
(AutoCAD or Microstation). This enables the system to function so that
detail doesn't deteriorate even with large areas (100,000 square feet to
unlimited miles). This enables accurate reading of room labels to quickly
identify exact location of tags.