TY - GEN
T1 - Location estimation indoors by means of small computing power devices, accelerometers, magnetic sensors and map knowledge
AU - Vildjiounaite, Elena
AU - Malm, Esko-Juhani
AU - Kaartinen, Jouni
AU - Alahuhta, Petteri
PY - 2002
Y1 - 2002
N2 - A distributed real-time system, based on wearable accelerometers and
magnetic sensors, is proposed for location estimation and recognition of
walking behaviors. Suitable for both outdoor and indoor navigation, the system
is especially adjusted for irregular movements indoors. The algorithm, which
demands only small computing resources, performs step detection and
classification in the time domain, allowing the estimation of the size of each
separate step independently. Since the system finds the user's position
relative to an initial position, it is intended to be supplemented with
different types of absolute positioning information. Making use of map
knowledge, as an easily available source of this information, is analyzed. The
conclusion is drawn that referring to the locations of the corridors and
stairways increases the positioning accuracy and reduces the effect of
magnetic field distortions encountered inside buildings. The positioning error
of different system configurations was 3-10 % from traveled distance.
AB - A distributed real-time system, based on wearable accelerometers and
magnetic sensors, is proposed for location estimation and recognition of
walking behaviors. Suitable for both outdoor and indoor navigation, the system
is especially adjusted for irregular movements indoors. The algorithm, which
demands only small computing resources, performs step detection and
classification in the time domain, allowing the estimation of the size of each
separate step independently. Since the system finds the user's position
relative to an initial position, it is intended to be supplemented with
different types of absolute positioning information. Making use of map
knowledge, as an easily available source of this information, is analyzed. The
conclusion is drawn that referring to the locations of the corridors and
stairways increases the positioning accuracy and reduces the effect of
magnetic field distortions encountered inside buildings. The positioning error
of different system configurations was 3-10 % from traveled distance.
U2 - 10.1007/3-540-45866-2_17
DO - 10.1007/3-540-45866-2_17
M3 - Conference article in proceedings
SN - 978-3-540-45866-1
T3 - Lecture Notes in Computer Science
SP - 211
EP - 224
BT - Pervasive Computing
T2 - 1st International Conference Pervasive 2002
Y2 - 26 August 2002 through 28 August 2002
ER -