27-08-2012, 02:49 PM
PIR Based Security System with Voice Announcement
1PIR Based Security.doc (Size: 87 KB / Downloads: 44)
ABSTRACT
PIR devices can detect a person moving into or through a detection zone with high reliability. The slightest positive or negative thermal radiation change in contrast to a background, focused by the appropriate optics, triggers the sensor element. There is no interference between neighboring units due to the passive nature of the detection principle. The use of differential or dual-channel sensor technology and advanced digital signal processing reduce false alarms caused by turbulence. Similarly, precision optics accurately defines the field of view, allowing consistent and long-range coverage.
Utilizing PIR sensor we are going to present our final year project “PIR based security system with voice announcement”. We consider specific area around which no one is allowed to enter. When any one enter in this specific area, the exit gate automatically get closed, voice warning (Our recording) starts playing and also our system deliver a voice massage to the police station for further operation. We use PIR motion sensor to sense motion around the secured region, processing is done using 8051 microcontroller and voice dial ups is done using voice processor.