Hi,
I'd like to know if some kind of 3D positional system exists in this world.
I explain. The purpose of this 3D system would be to correcly monitor the xyz coordinates of a sensor in a small space (typically a room that covers something like 500 m3). In small words, this sensor is to be worn by old people in a rest home or patients in an hospital.
The hoped features are thus:
- the horizontal resolution doesn't need to be very sharp (a few dozens of cm) but I would like to have a correct vertical resolution in order to detect falls;
- the system can be active or passive wqith a preference for passive systems (RFID tags for example);
- the system MUST be wireless, of course, with a preference for RF (I can't imagine a ultrasound system be able of suche things) and be interferences-proof;
- last, the system MUST be able to send several positional information per second in order to detect falls (falls is merely a high negative dz/dt).
I know that accelerometers are useful in this kind of need but accelerometers only measure acceleration. Si, I'd like to know if a different concept based on permanently monitored 3D position could be financially viable.
Does this kind of thing exist today ?
Rgds,
db