I am wanting to track motion of machines. I am hoping to get some feed back as to what would be the best sensor to track vertical motion. I just need to know when something is being lifted off the ground and when it comes back down to a stationary position. i do not need to track 3 axis movement, just up and down. I also do not care if i can or cannot track force, movement is its primary function.
Ideally i do not want a sensor mounted away from the machine, but something that could be attached to the machine that is being lifted.
Any suggestions on what type of sensor i could use to do this?