Best way to detect a bot

[dpeterson3]

What if I used an shielded antena? What I mean is what if the antena was shielded in the direction of my own motors. Also, I could take measuements before hand and figure out what level the EM is at when all motors on the bot ar running and use the code to filter them out.

[Daniel_LaFleur]

Originally Posted by dpeterson3

What if I used an shielded antena? What I mean is what if the antena was shielded in the direction of my own motors. Also, I could take measuements before hand and figure out what level the EM is at when all motors on the bot ar running and use the code to filter them out.

The only way I know that would shield your antenna (without interfering with its function) is to put a Faraday (sp?) cage around your motors which would affect their efficiency.

Also, Mr Freeman is correct that while you may be able to detect another robot by its EM emissions, judging its distance by field strength is probably not going to be effective/possible.

[Mr. Freeman]

Something tells me that the changing EM of the other robots will make that worthless. I don't know much about this, but if the changing EM from your own motors is enough to wash out the antenna, then you aren't going to be able to judge distance to other robots for the same reasons. The robot may be stopped, or the motors might be spinning at full power giving different EM readings regardless of where the other robot actually is.

[dpeterson3]

I guess you guys are right. It still sounds like a cool idea, though. I guess I will stick to ultrasonics and IR like everyone else.