I am designing a system where I need to detect the distance of a metal target in a very space constrained application. I have determined that the LDC1612 and associated coil design could fit well (about 14mm of travel, ideally several hundred repeatably accurate position detentions over this range).
The odd part of my application is that the metal target is attached to a lever arm, which will swing in from a fairly shallow angle of about 12 degrees. I realize that the induced eddy currents occur maximally when the target is parallel to the coil, but I'm wondering if this extra bit of variation will kill my accuracy?
To put the application another way, the target will travel from 15mm away from the coil to 1mm away from the coil. At the beginning position, the target will be 12 degrees relative to the coil -- and it will end parallel to the coil.
Are there established calculations to show how this angle might effect accuracy? Or does anyone have a gut-feel for how this might work out?
Thank you all for any guidance you may be able to provide.
