Comparing Barcode Readers to Other Vehicle
Identification Systems
Access control systems exist to control who is allowed to enter a door or gate. Before opening
a vehicle gate, the access control system must first identify the vehicle to determine if it
should be allowed in. Keypads, swipe cards, transmitters, prox cards, and barcodes can all be
used to identify the vehicle that is entering, but which technology is the right one? This is a
complicated question, and the following discussion is intended to be a basic comparison of
how these devices operate along with some pros and cons for each technology.
First, these different access control technologies can be separated into two basic groups,
Manual Vehicle Identification and Automatic Vehicle Identification.
Manual Vehicle Identification
In this category the driver of the vehicle is required to perform some physical action that
identifies the vehicle to the access control system.
Keypads require a driver to stop, roll down a window and enter an access code on a pad.
These systems are very inconvenient when it is raining or snowing and easily compromised
by people giving out security codes to friends, relatives, vendors, etc. Even if all codes are
reset, by Friday night the pizza delivery drivers and most of the high school will know at least
one valid code to enter. Also, vehicle traffic will tend to back up at the gate since it takes
around 30 to 60 seconds per vehicle to stop, key in the entry code, wait for the gate to open,
and move on. An advantage to this system is cost – this is the most inexpensive way to
control access.
Swipe or Contact Cards also require a driver to stop, roll down the window and swipe a card
through a slot or touch it to a pad. These systems are inconvenient when it is raining or
snowing, and cards are easily lost or loaned to friends and relatives. Fortunately, the same
card cannot usually be loaned to more than 1 person at a time, but widespread use of this
technology has made it easy to obtain duplicate swipe cards and give them to family and
friends. As with keypads, vehicle traffic will tend to back up at the gate since it takes around
15 to 30 seconds per vehicle to stop, swipe or touch the card, wait for the gate to open, and
move on. An advantage to this system is cost – this is a relatively inexpensive way to control
access.
Access Control Transmitters (or "remote clickers") are physically similar to garage door
openers. To open the gate, the driver presses a button on the unit. The advantage here is that
most systems have a long range, so the gate can be opened while the vehicle is far off. Traffic
does not back up at the gate as there is usually no need for the vehicle to stop. However, the
transmitters cost between $15 - $35 each, are relatively easy to lose and can be loaned to
friends or family. Duplicate transmitters are easy to acquire over the Internet, and of course
batteries will have to be replaced periodically. Cost is an issue with this system, mostly due to
the expense of the transmitters.
Ver. 1.8 Barcode Automation, inc 800-528-9167 FAX: 407-327-6172 3
(28 Seiten)
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