So I need to setup a system for measuring a Wankel engines shaft velocity on either side of an elastic coupling in order to investigate issues with them tearing. I want to setup an encoder on both sides of the coupling to measure shaft accelerations on either side in order to characterize the force applied to the coupling. I've looked at a few options but the location is challenging. Essentially I'm trying to find an encoder with at least a 720 pulse per rev resolution (Though greater than 1800 would be preferred), a relatively large setup tolerance, and preferably a differential output. I've looked at solutions from RLS (Renishaw in the states) with their magnetic incremental encoders which would work but they have extremely tight air gap tolerances (0.1 to 1 mm). I'm also leaning more toward optical encoders as the location I need to mount them is very close to the ignition coils and so are a very electrically noisy environment.
Anybody have any leads they can pass my way on Encoders that might work for me?
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