I design several small aggragtes moving along an elliptical path in an endless turning sequence.
My probrem is , I am searching some robust ways to send data to these aggragtes. there are 4 physical segments each 4meters long, And each segment should send some segment specific data to the moving aggregate.
I can not use cable, because it is an endless turning loop
I can not use wireless because, there are several aggragates and wireless can not differ in which segment is the aggregate moving. attaching a position sensor to all aggrehates is very expensive (there are 420 aggregates)
What I imagined is that Each segment send some differential data through conductive roller bearings on the aggregates. The problem is that the bearing contact is very noisy and have serious prell effects.
what would you recommend for a very noisy and uncertain contacts . How can I send data to aggrgates.
I imagined 2 phase shifted signals . And the mover measures the time difference of the signal 100 times a second and sorts the results. The most equal ones are filtered and this will be interpreted as result. (using standard deviation).