Hi,
I've been trying to figure out the best way to "follow" an object in 3D space. I don't need the absolute world position. Just a relative position to the second Arduino that I can attach to anything I want to. I don't want to use cameras and machine vision if possible.
Is there some sensor combination, that could be used to achieve that? Cost is not a problem, but I'm willing to give up some accuracy if it means a lot cheaper price.
GPS usually works well out of doors. Indoors is far more difficult, but there is Pozyx.
There is nothing I know of that will give you a relative position without having an external origin reference.
A particularly difficult problem is to determine the distance between two Arduinos, and posters ask about that every few days.
Pixy will give you 2D position. There have been a few successful projects measuring distance with ultrasonic sensors.
If cost really is not a problem, then there are techniques that satellites and other spacecraft use, but probably not with Arduinos.
It would help a lot if you gave more details.
What are we talking about? Tracking an airplane? Tracking the position of a digital glove?
Pieter
So, the use case is still being shaped, but let's say that I have an arm or drone that can be precisely controlled in 3D space. Then I have another object that can freely move within 40m3 area.
I would like for that drone/arm to precisely follow the first object. I can mount Arduino/sensors to both objects, but I can't get any position/control/movement/acceleration data out from them in their stock form.
GPS is not accurate enough, since It needs to be actually able to grab on whatever it's following. Of course if GPS can be used to keep some other sensors in sync, that's feasible. The use case would be in outdoors.
And well yea, military level stuff is probably out of our budget. However couple thousands for the prototype sensors is feasible.
Pozyx, then.
Investigate Boeing's assembly plant in Everett Washington. They use a system similar to GPS, but inside the building to assemble airplanes, especially wings, tail components. I have seen reports they are accurate within a fraction of a mm. As I recall the use IR emitters in ceiling.
Paul
JjyKs:
I would like for that drone/arm to precisely follow the first object.
Glue. Or screws.
MorganS:
Pixy will give you 2D position. There have been a few successful projects measuring distance with ultrasonic sensors.
There are some nice demos of robot followers using Pixy. I think they can be extended to 3D but I am not sure how well Pixy cameras works outdoors and at 40m3 distances. There are many demos but all the ones I have seen are indoors and at room size distances.
This is one example of a Pixy robot follower.