Global Positioning System Reference
In-Depth Information
Differential
corrections
(optional)
GPS
Receiver
GPS
receiver
Auxiliary sensor(s)
Integrated processor
• Positioning solution
• Map matching
• Route guidance
• User interface
• Gyroscope
• Magnetic compass
• Odometer
• Wheel speed sensors
• Accelerometer
•
User
interface
Barometric altimeter
Digital
road map
Figure 9.18
Generic vehicle navigation system architecture.
Many diverse applications involve vehicle tracking, most of which use GPS for
positioning. In vehicle tracking applications, the position of the vehicle is deter-
mined and then sent via wireless data connection to a centralized monitoring facility
or fleet dispatcher. A typical vehicle tracking system architecture is shown in Figure
9.19. Like the navigation system, the tracking system has a GPS receiver, auxiliary
sensors, and a computer processor to control the components and calculate the opti-
mized position solution. In addition, there is a wireless data radio for communicat-
ing the vehicle position data and possible status to the central monitor. At the central
monitor, the vehicle position and other attributes may be displayed or overlaid on a
Differential
corrections
(optional)
Wireless
data
connection
GPS receiver
Auxiliary sensor(s)
• Gyroscope
• Magnetic compass
• Odometer
• Wheel speed sensors
• Accelerometer
• Barometric altimeter
Integrated processor
• Positioning solution
• Communications control
• Data management
Figure 9.19
Generic vehicle tracking system architecture.
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