I am developing an Arduino based control system for a glider launching system.
I'm about 99.9% complete and I only need to deal with the line recovery phase.
Basically, once the glider has done with the towing session, there is up to 3000ft of tow line to be reeled back onto the winch drum.
I'm looking for a way of detecting when the end of the line is near. (The line has a drogue on it to offer some resitance during the line recovery)
I was thinking of using an RFID capsule embedded in the line. As the RFID capsule passes the RFID reader I can detect it and shut the winch down.
Question is this: What is the response time for an RFID reader as a capsule is placed near it. It has to be quick and I suspect it will be ouside the 200ms range I need