AZI 360 - page 5

Azi360
is an online localization and orientation device for visually impaired persons. It comprises a
Nokia 6210
Navigator
mobile phone
with GPS receiver and internal numerical compass,
a communication program
«
Azi360
», a screenreader «
Talks »
or «
Mobile Speak »
and numerical map models available from the
database on the application server.
U
rban models of downtown Geneva, Lausanne and Neuchâtel, together with orientation data, are acquired and
fed into the «
Navstreets Q4 2008
» data. These models are progressively improved and completed depending
on the behavior and on the preferences of the users.
D
irection of movement and information about the environment
T
he numerical compass of the mobile phone allows to establish an interactive exchange between the moving
user and his or her environment, and therefore a selective exploration of the surrounding objects. Endowed with
this means of recognition, the
Azi360
device gives the user a very good sense of his or her environment by
means of the information provided.
C
onventional
navigation tools allow for a visual representation of buildings and streets on the background of a
map. The
Azi360
device is the first navigator of its category to transmit quantitative information about the traffic
route direction by means of a screen reader.
N
avigation methods
Azi360
comprises a learning mode of the various navigation methods. During an adaptation phase, the system
determines the usual step rate of the user and computes his or her average speed over a delimited distance.
T
his pragmatic procedure verifies whether in the vicinity of obstacles, e.g. in an unknown zone, a blind person
tends to increase the frequency of his or her steps and diminishes their size, so as to maintain his or her usual
speed with shortened reaction times when an unexpected situation arises.
S
peed of motion
I
n order to make it easier for the user to control his or her rate of steps, the device emits a sound every 10
seconds. The user must become familiar with the system and practice regularly so as to allow for his or her
customary speed of progression.
T
ests and performances
D
uring several months tests have been conducted in various places with
Nokia 6210 Navigator
mobile phones.
Using online map models in prediction mode, performances of the
Azi360
device
were most often better, as
concerns location and stability, than comparable products which are currently available.
R
egistration, download and installation
A
n online registration form is available at
.
The communication program «
Azi360
» can be
downloaded freely from the web site and installed on the
Nokia
mobile phone.
Techniques de l’information Rue du Cudeau-du-Haut 4 CH-2035 Corcelles NE
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