AVL
stands for Automatic Vehicle
Location which is a term used
for naming the system able to track
vehicles, vessels, and mobile assets
such as trailers, containers, and equipment,
plot their coordinates into one or more
computer generated maps and be able
to interact with them in several ways.
In
AVL business, all vehicles in a fleet
must have a unit, or GPS
Vehicle Unit which can report its
position to the HP Base
Station over a cellular communications
network (AMPS, TDMA, CDMA, GSM, etc).
With
HunterPro Base Station
you can monitor a virtually unlimited
number of vehicles, so you
can raise your number of customers without
any trouble using our turnkey solution.
All cars can
now be secured and monitored
24 hours a day by his owner with HunterPro
GPS
Four Components
of AVL The Four Components
of AVL:
1. GPS
Satellites
There
are many GPS Satellites orbiting the
entire globe, transmitting, positioning
and timing data day and night in all
weather conditions. To learn how a GPS
work, please see the GPS
Info Page.
2.
Mobile GPS Unit
More
vehicles are installing GPS devices
to track satellites and calculate its
position, but the position can only
be seen locally, or the system can be
used partially because is not a turnkey
system..
A
normal AVL system would basically:
-Receive GPS satellite signals.
-Calculate your position, speed, heading
and altitude.
-Communicate with the base station using
different cellular technologies.
-Use an intelligent engine to decide
when to report data and how.
-Receive the precise time and date.
-Log data track geographic location.
Please see the GPS Info Page
for information regarding how the GPS
System works.
3. Communications
Network
HunterPro-GPS
has a secure cellular transceiver embedded
which offers an accurate and inexpensive
communication through the cellular network,
so that the vehicle can transmit
its position and other information
to the base station without errors.
The communication goes both ways so
that the base station can check
the status of its vehicles
and if needed send new instructions
to it, like remote commands for example.
4. AVL Maps
One of the more visible
features of AVL is
that you can use base station software
to automatically display vehicles on
a realistic geographic map.
Depending on your map display software,
maps can be zoomed in and out to virtually
any level of detail, and can be set
to automatically scroll to follow a
designated vehicle.
While map representation
is helpful in most AVL
applications, it's not always necessary.
For example, in emergency 911 dispatch
an AVL system usually
shares the vehicle position data with
a Computer Aided Dispatch system (CAD),
which then automatically identifies
the closest emergency vehicles. In this
application the dispatcher does not
need to refer to the map on a regular
basis.
More information
on HunterPro-GPS Cellular Products
can be found on these pages:
