Comparing Barcode Readers to Other Vehicle
Identification Systems, continued
Automatic Vehicle Identification
When using equipment in this category the vehicle driver does not have to do anything
special for the access system to operate. As the vehicle approaches the gate it is identified
automatically, with no action required from the driver. These are generally known as "hands
free" systems and represent the most advanced equipment used for vehicle identification.
Prox Cards (or RF-ID Tags) are miniature radio tags attached to the vehicle. As the vehicle
approaches the gate, a radio signal is used to read the vehicle ID tag. Traffic flows smoothly,
as there is usually no reason to stop at the gate. The main disadvantages of this system are
the cost of the system and problems reading the tags due to radio frequency interference.
Prox cards in general are designed to mount inside most vehicles, but some high end car
models actually block the radio signal. These vehicles require a more expensive waterproof
tag mounted on the outside of the vehicle.
Barcode Readers use barcode decals on the vehicle for identification. As vehicles pass the
barcode reader it detects the decal and reads the ID code which identifies the vehicle. Since
the decal is applied to a window, it makes the vehicle itself part of the access control system.
Barcode readers are not affected by radio frequency interference, making them ideal for
areas where Prox cards do not operate well. BAI readers are also immune to interference
from the Sun or other light sources. Vehicles can move past the BAI reader at up to six feet
away, traveling at up to 25 mph. For use on larger vehicles, such as big rigs or delivery
trucks, special decals are available with a range of up to 12 feet from the BAI reader.
Points To Consider
● Barcode systems are not affected by many of the problems experienced by RF-ID
systems, such as radio interference or low battery life. Many RF-ID tags are portable
and can be lost or loaned to friends or relatives. Barcode decals, once properly
attached to vehicle windows will not be lost or loaned out unless the entire vehicle is
lost or loaned.
● Despite rumors that vehicle barcodes can be easily copied, BAI readers absolutely will
not read photocopies or photographs of barcodes.
● BAI barcode decals are available in 56 different color combinations, which is useful for
color coordinating or color coded parking areas, etc. Many locations already use a
parking sticker or membership decal to identify valid vehicles, so it makes sense to
move up to a decal and reader that allows automated entry. For those who don't want
an obvious barcode on their vehicle, our less noticeable black-on-black decal is a very
good choice.
Ver. 1.8 Barcode Automation, inc 800-528-9167 FAX: 407-327-6172 4
(28 páginas)
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