My research group and I are developing a machine to diagnose early stage knee osteoarthritis. It is essentially a inclined leg-press and we need to know the displacement of the plate you push. For this we need very high accuracy (preferrably <5 mm) over approximately 1 meter travel. Budget is around 150 £, but is flexible.
I have done a lot of searching for cheap common arduino sensors, but they all seem to have too low accuracy (Best i found was ± 2.5 cm, which is not nearly enough. I think it was the lidar).
I have also looked at industrial-grade laser sensors, which provide me the accuracy i require (ex. keyence IL-600), but i have a limited knowledge on the connective possibilities with these types and the arduino. Is is possible to use this kind of sensor with an arduino - or is there any simpler way to record output from this? Best case scenario would be to use matlab, if possible!
Any other ideas and poosibilities are most welcome!