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REAL TIME SMOKE DETECTOR MONITORING AND INFORMATION SYSTEM

Platform : EMBEDDED

Real Time Smoke detector Monitoring and Information System

 

Abstract

 

 

 

In a photoelectric smoke sensor which produces a fire alarm signal when an amount of attenuation of received light exceeds a predetermined level due to smoke flowing into a space between light emitting and light receiving devices, the level of a receiving light signal from the light receiving device is converted by a converting level control signal. An initial value of the receiving light signal is converted into a digital quantity which is stored in a memory circuit. The digital content of the memory circuit is then converted into an analog quantity. The analog quantity is then compared with the level-converted receiving signal to produce a fire alarm signal. The analog quantity and the level-converted receiving signal are compared with each other at a predetermined period to correct the converting level control signal when there is a difference between the analog quantity and the level-converted receiving signal as a result of the comparison. With such a scheme, a change of an amount of received light due to dust or dirt of an optical system of the smoke sensor is automatically corrected. When the level correction reaches a limit, an alarm is issued for inspection and maintenance of the sensor.

 

 

 

 

 

Software Requirements:

 

 

 

  • Embedded C
  • Keil Micro Version

 

 

 

Hardware Requirements

 

 

 

  • Photoelectric Detectors
  • Microcontroller AT 89C51
  • Lcd 16X2
  • Hooter
  • Software Embedded C

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Block Diagram

 

 

 

 

 

 

 

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                                                         AT 89C51                      LCD 16X2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

                Photo Beam Detector                                              Hooter

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 



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