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The
goal
of
the LOPSI group is the obtention of scientific knowledge and the
development of
technology based in accurate and reliable techniques for localization
and exploration which can be applied to the enhancement
of intelligent
systems.
The LOPSI group centers its
research effort in two key areas:
High
accuracy
3D positioning with ultrasonic technology
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We use ultrasound for high accuracy 3D
positioning in small areas, by using
multilateration
techniques with
the times of flight of ultrasonic signals propagating from a set of
beacons to a mobile node. For
accurate range estimation and multiple transducer capability, the
ultrasonic signals are digitally modulated and encoded with the
orthogonal codes used in CDMA communication systems, essentially
translating the GPS design to an ultrasonic system. Our ultrasonic
positioning prototype achieves a typical accuracy of a few centimeters
in a space of a some cubic meters. This technology is useful for
robotic and industrial applications, as well as in the development of
personal aids for precise positioning tasks. |
Localization
of
people in indoor areas with RF and inertial sensors
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We work in Local
Positioning Systems (LPS) capable of locating, tracking, and guiding
people in indoor environments, where GPS devices are not operative. We
do so by combining RF technology (like RFID or UWB) and
foot-mounted
inertial measurement units (IMUs), with pedestrian
dead reckoning techniques or Bayesian state estimation. Current
applications of this system are in
the Autonomous Guidance Vehicles field, in the
development of Assistance Systems for
people, and as one of the
foundations of Ambient Intelligence
and Location-Based Services. |
More information about our
research lines, projects, and publications is found in the menu entries
in the left.
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