Our precise indoor positioning system – Marvelmind Indoor “GPS” – already has typical ±2cm accuracy, which is enough for 90% of real-world precise indoor positioning and navigation application. But some people ask for more… – “the highest possible”, “sub-cm level”, “mm-level”.
Let us discuss in more detail what can be done to achieve the highest possible level of accuracy from the existing indoor positioning system and what the next development points are.
Metrology can be a pretty complex and rather impractical science. One asks a simple question: “How precise the system is?” and gets a very long answer that refers to the conditions, method of measurement, probability and confidence … “OK… but what is the accuracy? And how do you measure?”
Well, we don’t want you and us to engage in that discussion, because it is rather scientific, lengthy and impractical, because doesn’t give usable answers on basic questions.
Let’s do practical things that give answers to your engineering and commercial questions like:
First, check the videos on the right to see examples of the current performance of our precise indoor positioning system in comparison with UWB.
Another video – hints and advice on the settings to achieve the sub-cm level of accuracy for the expense of latency – by employing the embedded into the Dashboard or the beacons themselves Realtime Player.
The last video is about the testing method, a lot of statistics and results that shows that we nicely fit into the claimed ±2cm accuracy.
Center of the beacon for transmission (TX):
Center of the beacon for reception (RX):
See more detail and graphics on the picture.
Similar approach is used with other beacons. See more about their geometry:
The indoor positioning system can automatically measure distances between the beacons, for example, between Super-Beacons or Industrial Super-Beacons – so called dual-use beacons. They can transmit and receive ultrasound. By measuring distances to several beacons, building a table of distances and employing trilateration
However, even they cannot know their height, because it is a relative term
See more detail and graphics on the picture.
There are several element that has to be taken into account in order to increase the accuracy of already precise indoor positioning system even further.
Do you really need it?
This can be rather obvious, but do you really need to increase the accuracy? Of course, the higher the better. But everything comes for the expense or for a compromise or a sacrifice. Thus, before engaging, double-check that you really need even more accurate system and ready for additional steps, efforts, trade-offs.
Basics first
Enable Realtime Player
Build submaps with proper geometry
Noise or wind
If anything is unclear, contact us via info@marvelmind.com