Electronic Surveillance System

[Awarded 1st Prize at Potential 2007, EESA, Dept of Electronics, KJSCE]

An electronic surveillance system, my final year engineering project (Senior Design Project). The project was undertaken by me and Aakanksha under ONGC (Oil and Natural Gas Corporation),one of the largest oil and gas (Exploration and Production) public sector Company in India. The purpose of the project involved providing complete foolproof security of the process facilities and data room in terms of physical security.

The system consists of the following modules:

a) Controlling unit.

b) Electronic EEPROM Key and Reader.

c) Electronic Code Lock System.

d) Alarm system.

e) Door control module.

f) Camera module.

g) PC interface and Data base of access records and videos of valid as well as invalid entries.

The main advantage of the project is that it involves computer interface, display, and controlling of the entire system.

The user has to first enter a valid EEPROM key into the EEPROM reader or Key slot provided on the door. The EEPROM key consists of a 2KB serial CMOS EEPROM which is pre-programmed with a digital code. Each key is programmed with a different code and the codes of each key with its holder’s details are known to the computer. Thus the computer can identify the user by the key he/she uses. Thus the EEPROM key provides with the facility of personal identification and the main advantage of this key is that it cannot be copied.

Once the key is entered in key slot and identified by the computer, the computer then displays the details of the corresponding user on the computer screen. Thus the entry of the user is registered.

The door does not open only by entering the key. The user has to then enter a code through the matrix keyboard on the door. If the code entered by the user is wrong the user is provide with two more chances of correcting the code. If a wrong code is entered thrice the alarm system is turned on.

Once the correct code is entered the user can withdraw the key from key slot. The controller then opens the door by rotating of the DC motor which is connected to worm gear type lock connected to the door. Once the door is opened, the motion detectors detects the motion and activates the camera motor and recording begins. The camera motor is provided to increase the view angle of the camera and thus cover all the area with the help of a single camera. All the entries, authorized or unauthorized, in the room detected by motion detectors are recorded, thus providing with the information of the users activity inside the room.

Now if the invalid user approaches and without fiddling with the Code Lock, if he directly tries to enter inside. The door lock isn’t activated, thus the door remains closed. Now if the invalid user still manages to open the door the motion detectors which are used to detect any motion in the room, activates the alarm and the camera captures the person entering the room, also the images are recorded onto the PC in the control room. Thus in this way maximum security is provided by this system. Also an emergency or alarm notification is visible on the computer screen.

The camera remains on all the time and the current position of the room is displayed on the computer display, but the rotation of camera and recording starts only when motion is detected. This avoids unnecessary usage of storage device and all the important information is recorded. Thus the system becomes more cost efficient.

The camera DC motor can be adjusted manually through the computer so as to set the camera in a particular direction.

The computer used for monitoring is placed in a control room. The computer uses a Visual Basic interface with the user so as to make it user friendly. The recorder, door lock, camera and other such devices can be controlled by proper commands using the computer.

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