Question: How do you track someone who is working in a mine?
Problem: The harsh environment of a coal mine, denied access to GPS, and other factors make this problem difficult enough, but the lack of industrial acceptance makes it even harder!
Extreme Endeavors used a combination of inertial navigation sensors and RFID tags embedded in the roof of the mine to track miner footsteps.
The inertial navigation sensors were those used for tracking people in the military; however, they failed due to the metal inside the mining boots. Modifications had to be made.
Resetting based on the location of RFID tags worked excellent.
In spite of the life-saving potential of this technology, the industry opposed it: they feared it would be used to "police" miners and possibly result in wrongful termination. Acceptance was difficult!
