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 INFORMATION
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GPS signal
Gyroscope
Speedometer
signal
Navigation
computer
Digital roadmap
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054.346.3
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