I would like to know which sensors should I use in order to get measurement of a movement of my device (slow speed movement on a 2D plane, in cm or mm if possible). The goal is to find out if the user has moved the device from a starting point and to calculate the distance between the two points.
The plane will be 2.0m x 0.5m. It will be a device held by a person that will begin the "measurement" at the intersection of the diagonals of the plane. The user can lift the device. I can't tell you exact the speed right now - just a slow hand movement (but the speed will not be constant).
I would appreciate any advice on a device that could rotate; But in this case I am asking for a non-rotating device (there will be single point to track). There are no cost restrictions, the smaller the device, the better.