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RFID Parking Area Vehicle Access Monitoring and Control
Application: Parking Area Access Control Using RFID Tag
Recognition
Quatech Products Used: DSE-100D
2 Port RS-232 Serial Device Servers
RFID technology is rapidly gaining ground in the access control industry.
One area where it can provide significant advantages is in vehicle access
control. Cars, trucks, or other vehicles--even forklifts in warehouse
environments--can be tagged with passive RFID transmitters. When a restricted
area, or a parking lot entrance, is approached, a reader at the site accesses
the tag. If the vehicle is authorized, the gate opens and it is allowed
to pass.
In the very simplest systems, the mechanism works in pass/fail mode--access
granted or access denied. However, if the data from the tag can be connected
with a database, functionality of the system is greatly enhanced. Clearly
it is not practical or cost effective to locate a PC at each entry point
where an RFID reader and the gate control mechanism are located. However,
as both require an RS-232 serial connection to communicate with a computer,
making input from them available across a network once required just that.
Now, with serial device servers, RS232 RFID readers and gate control
mechanisms can be remotely monitored and controlled via Ethernet. The
above diagram depicts a standard network-enabled RFID parking applications.
This network-enabled configuration opens up many possibilities for RFID-based
access control systems. For example, a prepaid account can be linked to
the car's RFID tag. The RFID reader authorizes the car for entry, logs
entry time, and transmits that data back to the server, then the gate
mechanism is activated and the car enters. A similar exit point is configured,
and when the car leaves the RFID reader logs exit time, releases the gate
mechanism, and transmits the exit data back to the server. The customer's
account is then debited for the time she spent in the parking lot. The
advantages of this type of system include not only easy access for the
customer, but the elimination of staffing at entry and exit points.
Other Access Control Applications:
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