Dominique Blas
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 Posted:
Tue Sep 27, 2005 4:35 pm Post subject:
3D positional sensor for people |
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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
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