Submitted by
RAJA. I
PREETHI ASHWINI. A
DHIVYA. S

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1 INTRODUCTION
• INTRODUCTION & OBJECTIVES :
An Industry is a large area to maintain security measures
Manually, so the different problems faced by the industries can be overcome by the usage of certain Advanced Electronic Equipments. Such advanced Electronic Circuits are employed together to implement the security system.
The Indoor Security System provides all the facilities for full security necessities in an Indoor environment. Normally the problems in the Indoor environments are due to the Intruders, Fire Accidents and Improper Attendance Maintenance.
This project consists of an Attendance Entry, Unauthorized Entry Alarm, Fire Sensors, Proximity sensors & Door Open Control (Magnetic Switch).
1.1.1-Attendence Entry:
The circuit used for the attendance entry is implemented by the usage of the special circuit employing the IR-Sensor Board & the total numbers of the IR-Sensors is Eight. The total numbers of Employers Entry that can be made is of 256.
1.1.2-Unauthorised Entry Alarm:
The unauthorized entry detector uses the Infrared –Emitters & Sensors that operate for a longer distance than the ordinary IR sensors. Then this sig generated by the sensor circuit is given to the PC then it is indicated as a output in the Display Screen designed for the project output. It can be fixed in the walls to read any entry over the walls.
1.1.3-Fire sensors:
The LDR sensors will detect the flames occurring in any part of the indoor environment. The fire sensors make use of the Light Dependent resistors to sense the YOR colors i.e. Yellow, Orange, and Red. The sensed logic level is send to the corresponding display screen in the PC’s monitor and sends an alert message to the user to the corresponding area.
1.1.4-Proximity sensor:
The proximity sensor is used to sense the bombs and other explosives like RTX etc. The Proximity Sensors are generally the metal detectors which are sensitive to all the metals.
1.1.5. Door tampering control (Magnetic Switch):
The magnetic switch is used to sense any door opened or not.
When a magnet is placed near it the switch is closed, otherwise the switch will be opened. The magnet is fixed in the door and the magnetic switch is fixed above the door, when the door opens the magnet goes away from the magnetic switch and this is indicated in the output screen.
• ORGANISATION OF THE THESIS
Chapter2 deals detailed about the Project Description.
Chapter3 deals with the Power Supply.
Chapter4 deals with the working of the micro controller based PIC
Chapter5 deals with the hardware design
Chapter6 deals with the software design
DESCRIPTION
CHAPTER-2
PROJECT DESCRIPTION
2.1. ATTENDENCE ENTRY:
The circuit used for the attendance entry is implemented by the usage of the special circuit employing the IR-Sensor Board consisting of a total number of 8 IR-Sensors. The total numbers of Employers Entry that can be made is of 256.
Each employer’s card is provided with a specific number of holes.
These holes will allow the IR-rays to pass though them to the detector. The other rays from the Emitters are not allowed to incident on the detector.
Whenever the IR rays flow through the whole corresponding output at that location is low, otherwise it is in the high state.
In the circuit diagram the R3 resister acts as a current limiting resister for the IR-Emitter.
FLOW OF CURRENT = 5V/1K =5mA.
R4 limits the current output of the IR-emitter .Being IR-detectors are +ve sensitivity elements. We should not consume more current from it .If not then the device will become as a diode.
I=5V/100K=50uA.
So we consume 5uA from the detector.
R6 is the bias resister for the transistor.
Whenever IR-Emitter rays incident on the detector & makes the detector as a conductor. So the junction point’s voltage becomes low. That makes the transistor in to cut-off condition. The transistor collector becomes logical 5v and Schmitt trigger output becomes logical low. This is purely TTL.
Ultimate Result::
If a card consists of a hole, then the rays pass though it and the output become low.
Other wise if the output is high. Thus a Attendance Entry circuit works.
2.2 FIRE DETECTION:
As emitters have developed over the years, photo detectors have also advanced dramatically. Early photo transistors and photo diodes were soon joined by photodarlington detectors, and then by light-activated SCRs. Innovations in design have created devices having higher sensitivity, speed and voltage capabilities.
Recent developments in detector technology have led to larger and more complex circuit integration. Photo detectors incorporating SCHMITT TRIGGER logic outputs are becoming increasingly popular in applications requiring very fast speed, hysteresis for noise immunity, and logic level outputs.
Motorola introduced the world's first photo-triac driver, a planar silicon device capable of controlling loads on an ac power line. This was followed by the zero-crossing triac driver, also a Motorola development. This device stands as a classic circuitry, photo-optic technology; high voltage solid state physics and field effect transistor (FET) technology are all incorporated on a monolithic integrated circuit chip inside this device.
Future trends point to even higher performance characteristics and more circuit integration in photo detectors. Detectors, are like emitters, are available in plastic and in lensed metal packages.
2.3 METAL DETECTOR
It always possible that when influenced by destructive metals, it may lead to severe damages. For this purpose we configure a circuitry for metal detection in our project, where in each person will be checked with the help of metal detector before he makes an entry into the industry.
Proximity sensors were used in this project.
2.4. PROXIMITY SENSORS:
When ferrous and non ferrous materials came closer to the proximity sensors it senses and produces an output signal .
It has three terminals
• Supply
• Ground
• Output