23-02-2013, 02:22 PM
DESIGN AND IMPLEMENTATION OF PYRO-ELECTRIC INFRARED SENSOR BASED SECURITY SYSTEM USING MICROCONTROLLER
DESIGN AND IMPLEMENTATION.docx (Size: 16.27 KB / Downloads: 22)
Abstract:
This paper evaluates the development of a Low-cost security system using small PIR (Pyro-electric Infrared) sensor built around a microcontroller. The low-power PIR detectors take advantage of pyro-electricity to detect a human body that is a constant source of Passive Infrared (radiation in the infrared region). The system senses the signal generated by PIR sensor detecting the presence of individuals not at thermal equilibrium with the surrounding environment. Detecting the presence of any unauthorized person in any specific time interval, it triggers an alarm & sets up a call to a predefined number through a GSM modem. This highly reactive approach has low computational requirement, therefore it is well-suited to surveillance, industrial applications and smart environments.
The PIR Sensor detects motion up to 20 feet away by using a Fresnel lens and infrared-sensitive element to detect changing patterns of passive infrared emitted by objects in its vicinity. Inexpensive and easy to use, it's ideal for alarm systems, motion-activated lighting, and holiday props. The PIR Sensor is compatible with all Parallax microcontrollers. BASIC Stamp and SX/B code is available under Downloads below, and Spin code is posted to the Propeller Object Exchange.
PIR sensors allow you to sense motion, almost always used to detect whether a human has moved in or out of the sensors range. They are small, inexpensive, low-power, easy to use and don't wear out. For that reason they are commonly found in appliances and gadgets used in homes or businesses.
GSM, which stands for Global System for Mobile communications, reigns (important) as the world’s most widely used cell phone technology. Cell phones use a cell phone service carrier’s GSM network by searching for cell phone towers in the nearby area. Global system for mobile communication (GSM) is a globally accepted standard for digital cellular communication.
GSM is the name of a standardization group established in 1982 to create a common European mobile telephone standard that would formulate specifications for a pan-European mobile cellular radio system operating at 900 MHz. It is estimated that many countries outside of Europe will join the GSM partnership.
Existing System:
Today's indoor security systems built with various sensors such as ultrasonic detectors, microwave detectors, photoelectric detectors, infrared etectors etc. Each of these systems has its own limitations. As an example, photo-electric beam systems detect the presence of an intruder by transmitting visible or infrared light beams across an area, where these beams maybe obstructed. But the drawback lies within it if the intruder is aware of the presence of this system. Conventional security systems use cameras and process large amounts of data to extract features with high cost and hence require significant infrastructures
Proposed System:
Despite of having strong dependence on surrounding environmental status, pyroelectricity has become a widely used detection parameter because of simplicity and privilege of interfacing to the digital systems. Now, it is extensively used for intruder detection, smart environment sensing, and power management applications. Several works have been conducted in various applications. Intelligent fireproof and theft-proof alarm system ,GSM (Global System for Mobile) network based home safeguard system ,human tracking system and intruder detection systems are some notable works done previously based on pyroelectricity sensing technique. Our work introduces a low-cost security system solution. Utilization of existing cellular network to alert and inform the system owner about the security breach is made to cope up with ever increasing demand for cheap but reliable security system.