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This Project describes a design of effective security alarm system that can monitor an industry with different sensors. Unauthorized access, Temperature increment, IR detection can be monitored by the status of each individual sensor. Obviously, this burglar alarm also has an input to 'arm' the alarm, a tamper input and a couple of outputs to control a siren and Auto dialing system.
Often times, crime happens when no one is around to notice and the crooks are long gone by the time anyone gets back. Now, you can protect your home or office with the AUTO DIALER SECURITY and SAFETY ALARM. This auto dialer is a step
The Auto Dialer is a unique passive infrared system that monitors motion in an area you select. When the unit is ARMED, the motion detector watches the protected area. Once movement is detected, a 105db security alarm will sound and the Auto Dialer will call up to 5 preset telephone numbers selected by you. You will hear the message and know that your alarm has been tripped.
You can call the police to let them know what's going on and to check out your house.
The uniqueness of this project is not only alerting the neighbors by siren, it also dials a mobile number which is already programmed into the system. A mobile number or a land line number can be programmed into the system. As this system works on existing telephone line, it can dial the number even the subscriber is out of station
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PIR BASED AUTO DIALER SECURITY and SAFETY ALARM
ABSTRACT
Security is primary concern for every one. This Project describes a design of effective security alarm system that can monitor an industry with eight different sensors. Unauthorized access, Fire accident, wall braking, IR detection, and fire detection can be monitored by the status of each individual sensor and is indicated with an LED. This LED shows whether the sensor has been activated and whether the wiring to the sensor is in order. Obviously, this burglar alarm also has an input to 'arm' the alarm, a tamper input and a couple of outputs to control a siren and Auto dialing system. The alarm is also fitted with a so-called 'panic button'. The burglar alarm is built around the AT89C51 micro controller from Atmel. This micro controller provides all the functionality of the burglar alarm. It also takes care of filtering of the signals at the inputs. Only after an input has remained unchanged for 30 milliseconds, is this new signal level passed on for processing by the micro controller program. This time can be varied by adopting small changes in the source code. A maximum of 8 sensors can be connected to the burglar alarm. These sensors need to have their contacts closed when in the inactive state (i.e. Normally Closed). In addition, each sensor needs to have its tamper connection wired as well. A power supply voltage of +5 VDC is available for each sensor at the corresponding wiring terminals. Eight LEDs indicate the status of the corresponding sensors. When the alarm has been activated, the LED of the sensor that caused the alarm will light up, or flash in the event of a cable failure. When the alarm is armed, the LED 'alarm armed' will flash during the exit-delay. After the exit-delay, the LED will light continuously. The LED 'alarm triggered LED' flashes during the entry-delay and will turn on continuously once an actual alarm hasbeen generated. 'Alarm triggered LED’ turns off only when the alarm is switched off with key switch Sw1. When an alarm has taken place, it can be determined afterwards which sensor (or tamper input) caused the alarm to trigger. The LED 'tamper' lights up when the tamper input is opened. This LED will also continue to be on until the alarm is switched off. The uniqueness of this project is not only alerting the neighbors by siren, it also dials a mobile number which is already programmed into the system. A mobile number or a land line number can be programmed into the system. As this system works on existing telephone line, it can dial the number even the subscriber is out of station. 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
for more >>\
http://studentbank.in/report-cordless-security-system
http://studentbank.in/report-hitech-secu...vip-houses
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MOTION DETECTION USING PIR
ABSTRACT
This is a system based on PIR motion detector module. If the motion detection module detects any motion in the room or where it placed, it sends an out put to the micro controller which controls the whole system. When micro controller receives an input from motion detection module, it sends an out put to the relay driver section. When the relay was ON the light became on.
If there is no motion was happened the light remains OFF.
The main sections of this system are:
PIR MOTION DETECTION MODULE
Micro controller
Relay
Appliance to be controlled.
WORKING
When the PIR motion detection module detects any motion in the room, it sends an out put to the micro controller which controls the whole system. When micro controller receives an input, it sends an out put to the relay driver section. The relay driver section drives the relay ON. When the relay was ON the light became on.
If there is no motion was happened the light remains OFF.
PIR motion detection module
Compact and complete, easy to use Pyroelectric Infrared (PIR) Sensor Module for human body detection. Incorporating Fresnel lens and motion detection circuit. High sensitivity and low noise. Output is a standard 5V active low output signal. Module provides an optimized circuit that will detect motion up to 6 meters away and can be used in burglar alarms and access control systems. Inexpensive and easy to use, it's ideal for alarm systems, motion-activated lighting, holiday props, and robotics applications.
The Output can be connected to microcontroller pin directly to monitor signal or a connected to transistor to drive DC loads like a bell, buzzer, siren, relay, opto-coupler (e.g. PC817, MOC3021), etc. The PIR sensor and Fresnel lens are fitted onto the PCB. This enables the board to be mounted inside a case with the detecting lens protruding outwards.
Features
• Complete with PIR, Motion Detection IC and Fresnel Lens
• Simple 3 connections
• Dual Element Sensor with Low Noise and High Sensitivity
• Supply Voltage: 5V DC
• Standard Active Low Output pin for connecting to microcontroller directly
• Detecting range up to 6 meters
• LED indication
• Module Dimensions: 25mm Length, 32mmWidth, 25mm Height
Applications
• Motion-activated nightlight
• Alarm systems
• Robotics & Holiday animated props
Theory of Operation
Pyroelectric devices, such as the PIR sensor, have elements made of a crystalline material that generates an electric charge when exposed to infrared radiation. The changes in the amount of infrared striking the element change the voltages generated, which are measured by an on-board amplifier. The device contains a special filter called a Fresnel lens, which focuses the infrared signals onto the element. As the ambient infrared signals change rapidly, the on-board amplifier trips the output to indicate motion. The PIR (Passive Infra-Red) Sensor is a pyroelectric device that detects motion by measuring changes in the infrared (heat) levels emitted by surrounding objects. This motion can be detected by checking for a sudden change in the surrounding IR patterns. When motion is detected the PIR sensor outputs a high signal on its output pin. This logic signal can be read by a microcontroller or used to drive a transistor to switch a higher current load.
Warm up time
The PIR Sensor requires a ‘warm-up’ time in order to function properly. This is due to the settling time involved in ‘learning’ its environment. This could be anywhere from 1-2 Minutes. After this warm up time, sensor will be ready to use.
Using the Sensor
• •Connect regulated DC power supply of 5 Volts. Black wire is Ground, Next middle wire is Brown which is output and Red wire is positive supply. These wires are also marked on PCB.
• After powering up, allow startup delay time of 2 minutes before using the sensor. The sensor output might become LOW once or twice during this period since it has to learn about its environment. After 2 minutes, your sensor is ready for use.
• Preset in sensor is for delay time adjustment, Factory setting is 2 seconds. It means when a motion is detected, the sensor will keep output LOW at least for 2 seconds. It is normally not required to adjust this setting. Just in case you need to adjust the delay time, Make note of factory setting position, in case you have to revert back to original setting.
• To test sensor you only need power the sensor by connect two wires +5V and GND. You can leave the output wire as it is. When LED is off the output is at 5V, means no motion detected.
• Walk in front of sensor and the LED will lit up and output becomes 0V. The output is active low and can be given directly to microcontroller for interfacing applications.
Range of Operation
The PIR Sensor has a range of approximately 20 feet(6 meters). This can vary with environmental conditions. The sensor is designed to adjust to slowly changing conditions that would happen normally as the day progresses and the environmental conditions change, but responds by making its output high when sudden changes occur, such as when there is motion.
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