I'm working on a project where I want to very accurately (+/- 1 degree) determine the angle at which a finger is bent.
One of my main constraints is that my sensing mechanism can't interfere (much) with the normal positioning and movements of the hand.
I'm trying to determine the best sort of sensing mechanism for this project. I looked into a lot of rotational encoders but I can't find any small enough to fit between two fingers and this wouldn't work for the first knuckle joint.
My next thought was to use flexible strain gauges across the top of each joint but I don't think I'll be able to get anywhere near the amount of accuracy that I need.
Another thought I had was to place a hall effect sensor on top of the finger joint but I'm not super sure how accurate I'd be able to get with this.
Any thoughts on a good way to do this?