Security integrated system based on wireless Access Protocol for industrial applications using RF Module

Title of the project: Security integrated system based on wireless Access Protocol for industrial applications using RF Module
Domain: Wireless Communication & Embedded Design
Software: Embedded C, Keil, Proload
Microcontroller: AT89S52
Power Supply: +5V, 500mA Regulated Power Supply
Display: LED 5mm, 16 X 2 LCD
Crystal: 11.0592MHz
Security Channels: 8
Access Sensor: Reed Switch / Magnetic sensors, IR Sensor
Vibration Sensor, Piezo Electric Sensor
Panic Alert: Push-to-on switch
Light Detector: LDR
Communication Device: RF Module 433MHz
Applications: Industries, Banks, Jeweler Shops, Home security
ABSTRACT
Security is primary concern for every one. There are many ways to provide security at homes or in industries. But what if the security is assured irrespective of the person is inside or outside the house. This Project describes a design of effective security alarm system that can monitor an industry or house with different sensors using RF.
Wireless Security System is a security system using RF that monitors the status of each sensor at the transmitter side and displays this status at the receiver end. This project is mainly useful in homes, industries etc to continuously safeguard homes and industries. The RF transmitter and receiver can be placed anywhere within 100 meters since the range of RF modules used in this project is 100 meters.
The status of these different sensors can be monitored continuously and this status is transmitted using RF Transmitter. The response of these sensors is read at the receiver end. Whenever any of the sensors is triggered or activated, the response can be identified at the receiver side using LED indication and also on the LCD display and also the burglar alarm will be activated.
This project works on very well if the person, monitoring the status of the sensors at the receiver side, is 24*7 at the receiver end. But if the person is not available all time, this project cannot provide security in an effective way. Thus to enhance the features of this project, AUTO DIALER is also included. Thus, when anything goes wrong at the transmitter side, the same will be transmitted and received at the receiver side and the burglar alarm will be activated to alert the neighbors and at the same time, autodialing action will be carried on.
The system dials to the number already stored in the system. Thus, the person associated with this system receives the call from the system and can proceed with the necessary action. If the authorized person is inside the home or industry, only the two sensors i.e., panic switch and the main door sensor will be enabled since if anything goes wrong even in the presence of the authorized person, autodialing action should be performed and even the burglar alarm should be activated. If this person wishes to go out by opening the main door, the system waits for a small delay allowing the person to close the door. If the door is closed within provided delay, the autodialing action will be performed immediately. The remaining sensors will be disabled until the person opens the door and closes it within the provided delay. After this, all the sensors will be enabled assuming that the person is outside the home now. In either case whether the authorized person is in or out of the house; security is provided by all means.
The RF modules used here are STT-433 MHz Transmitter, STR-433 MHz Receiver, HT640 RF Encoder and HT648 RF Decoder. RF Transmitter is connected to the different sensors through RF Encoder. This encoder converts the 8-bit data into a single bit and sends it to the transmitter which will be transmitting. The data which is in the air is an analog value. At the receiving end, the receiver receives this analog value on a single data line and passes this data to the decoder. The decoder does the opposite functioning of the encoder i.e., it converts the single bit data into eight bit data and gives it to the microcontroller which does the further processing.
This project uses regulated 5V, 500mA power supply. 7805 three terminal voltage regulator is used for voltage regulation. Bridge type full wave rectifier is used to rectify the ac out put of secondary of 230/12V step down transformer.


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