I am on a robotics team that plans to compete in a competition where one of the rules is that no sort of sonic sensor is allowed to be used. I guess that limits it to some sort of EM frequency right?
Ideally, my team is looking for a simple beacon system, where beacon A would be attached to the robot, while beacon B would be attached to a known point on the competition space. Then, beacon A can give information about how far away B is. After some searching, I could only turn up laser rangefinders that required pointing at the target. I am a CS student, so I'm not familiar with the terminology to aid searches.
Another nice property would be if the beacons also gave the angle of beacon A in beacon B's field of view, although this is not necessary, since multiple beacons could be used to obtain this information.
We have an Xbox 360 Kinect working, and able to track things and give distances, but it looses accuracy over distance quickly (the arena is about 6 meters long), and this beacon should be as simple as possible. We ONLY need it for a relative position of our robot.
Alternate Solution: Another way to solve this would be for an omni-directional beacon to only give angle information, two of these could be used to triangulate, and do the job just as well.