Thanks to the quick comment of one personne about our project, today Benjamin and I started to study magnetic field indoor positioning and UWB positioning.
So, according to some scientific publications about the subject (especially a very interesting article of G. Pirkl an P.Lukowicz on Robust, Low Cost Indoor Positioning Using Magnetic Resonant Coupling 🙂 ) the solution using magnetic resonant coupling seems the better one.
Indeed, this has a number of advantages. As no waves are generated, wave phenomena such as interference and refraction do not occur. First good news.. Moreover, magnetic field is much more difficult to ”block” than electromagnetic waves. For instance, water which
is the main component of the human body, has no relevant influence. We also hope that “massive metal objects do not block the signal” and only have “local influence”. Last but not least information, the signal contains not only position, but also orientation information.
In summary, magnetic resonant coupling technology seems much less sensitive to disturbance typically found in indoor environments.
Unfortunatly, the physical principle of resonant magnetic coupling also creates some problems, in particular the energy use and the distance on localization which means theoriticaly high intensive magnetic field or relay devices to localize an object in a wide space.
Benjamin et Guénolé.