Annunciator for Hazard Prevention & Temperature Control

Abstract

It is a microcontroller based annunciator system that detects different faulty condition and inform operator about it. It not only informs and announces about the faulty condition but also takes an initial to control the hazard.The system will consist of sensor which gives view of the condition to be monitored. If any abnormal condition arises then it gives indication to microcontroller. Microcontroller is programmed by user according to need. The Microcontroller may inform to the owner of a property about the condition abnormality and it set the driver on to take the remedial actions. Keywords - Annunciator, AT89C51, DTMF, EPROM I. Introduction Today all instrumentation system pertaining to industrial process control as well as domestic applications, like elevator control are centralized air conditioning control; involve some type of automatic fault finding facility. This facility detects the faulty condition of the operation towards it, enabling him to take suitable remedial action to ensure the proper operation of the system. One such method is annunciation. Annunciator is a device giving audible as well as visible indication of several physical parameters. Annunicator is a pilot device. A pilot device protects the process loop from serious hazardous condition by alerting the operator about the erroneous condition about the process. Process is a group of physical unit devices, which acts together to get desired objectives or output. Annunciator is device in which activation of a visual or a mechanical indicator called annunciator takes place when a remote switch or device has been activated as result of fault in certain part of the system. An audio alarm may also be associated with annunciator.