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How does the navigation system work ?
With the VDO Dayton Navigation System you have purchased a powerful tool
to assist the driver in daily traffic. By automatic route planning and guidance
you can concentrate on the essential things in today’s growing traffic –
especially in congested areas. Complicated and time-consuming planning with
conventional city and road maps is no longer required. You simply enter the
destination before driving off, activate “Guidance” and the VDO Dayton
Navigation System does the rest.
The VDO Dayton Navigation System offers you guidance advice in both an
acoustical and visual way. Few controls and a simple menu structure ensure
ease of use.
▲
Determination of the vehicle position
The movement of the vehicle is
measured by sensors that are
integrated in the navigation
computer.
The distance driven is recorded by
an electronic signal from the
speedometer and the rotary
movements of bends by the
gyroscope (a rotary measurement
system).
The information from these sensors
is, however, not always exact as the
values can be affected by skidding of
the wheels, varying tyre pressure due to changes in temperature, etc.
By comparison of these signals with the digitized map it is possible to correct
any inaccuracies of the sensors and to determine the position of the vehicle
quite precisely. In order to correct the data, a signal from the GPS satellites is
required for a period of several minutes.
▲
GPS (Global Positioning System)
The GPS System is based on the reception of
navigation signals from a total of currently
27 GPS satellites orbiting the earth at a height
of 21.000 km once every 12 hours. To
determine a 3D position (with longitude,
latitude and height), signals from at least
4 satellites must be received.
The integrated GPS receiver can handle up to
8 satellite signals simultaneously. This allows
an accuracy of about 30m to 100m which is
further improved by the other sensors.
GENERAL
English
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Gyroscope
Speedometer
signal
Navigation
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Digital roadmap
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