11-08-2012, 10:32 AM
PASSWORD BASED DOOR LOCK SECURITY SYSTEM.
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Introduction
In this age of digital technology, every device and operation has become digital based. Now with
digital based door lock systems, it is easier to control the door movement. The new automated door
lock system does not need a key to lock or unlock the door. This digital door entry system is in fact
controlled by keypad that is installed on the side wall of the door.
The keyless door is an electronic circuit based device. The working of this locking system is very
simple. It works on the entry number. The authenticated person has to enter the unique code using
keypad.
You can install a keyless entry system in your house as well as in buildings and offices. With this
system, you will never be in tension of leaving the sensitive areas out of your supervision.
Motivation
The main and very basic need of security was fulfilled by using the mechanical or electrical locks
which are very heavy and designed for only one key. Therefore a large number of locks of required
for locking a large industries there are many keys for different locks (i.e. a very tedious task to
arrange these keys). These locks are not so much protective and could be broken by using some
mechanical tools. All these problems could be solved if we use electronic locking system in place of
these electrical & mechanical locks. There are also some more features are available in these
electronic locking system The electronic security system are very light, flexible, reprogrammable,
lower cost, more accurate, highly secure and required less power. In this way due to the
introduction of the electronic security system the security need and fulfilled to a great extent and we
could protect a whole industry or company very easily and rapidly.
Description of working
Working is very simple. Simply enter the code, if the code matches with the code i.e. stored in its
database the door will unlock for a limited time. At the end of preset delay, the relay reenergizes
and the door gets locked again. When the code has been incorrectly entered three times in a row,
the code lock will switch to alarm mode and operate an alarm relay. Alarm relay are turned off after
entering a valid User Access Code.
Advantages
The main advantages of this device are as follows:
Highly secure
Flexible & Reprogrammable
Wide operating range & wide operating area
Less power consumption
Remotely controlled
Cost effective & Easily available