I am really tracking a remote
A TV IR remote?
Or is it just an IR beacon?
In that case the Bot needs at least two IR detectors and a way to determine if the beacon is to the right, the left or straight ahead. Then turn to keep the beacon straight ahead.
The Bot will also need a sensor to keep from running into the human. An ultrasonic distance senor is good for distance measurement.
Well I apologize for not being more specific in the beginning, basically the "robot" is a stationary tripod that holds camera (or equivalent). The sensors on the tripod track the remote on the person, and send a signal to a servo motor that will control the lazy susan (which the camera is on top of). And I realize that there already products like this out of the market, I am trying to design something new, and using a camera scenario is the best way to explain this. So:
-Needs to track a remote (no body heat tracking from IR)
-Decent range (20-30ft)
-Sensors won't be effected by objects getting between it and the remote
Any ideas? Would bluetooth or rfid tags work?