“DESIGN OF ALARM USING PIR SENSOR FOR TEMPERATURE DETECTIONS”

Given by:Akshay Dhole13MMT1013 (Mechatronics)

INTRODUCTION:An alarm device or system of alarm

devices gives an audible, visual or other form of alarm signal about a problem or condition. Alarm devices are often outfitted with a siren.

Alarms in an operation and maintenance (O&M) monitoring system, which informs the bad working state of (a particular part of) the system under monitoring. First-out alarm safety alarms, which go off if a dangerous condition occurs.

Common public safety alarms include: Civil defense siren also known as tornado

sirens or air raid sirens fire alarm systems Fire alarm notification appliance "Multiple-alarm fire", a locally-specific

measure of the severity of a fire and the fire-department reaction required.

 Smoke detector  Car alarms  Auto dialer alarm, also known as community

alarm  Personal alarm Tocsins – a historical method of raising an

alarm

FUNCTION:The primary function of the alarm

system is to warn the operator about a situation that is not normal.

The system should inform the operator about plant conditions that require timely assessment and possibly corrective action in order to maintain plant goals in terms of safety, productivity, environment and efficiency.

Alarms should:1. Be relevant to the

operator's role at the time2. Indicate what response is

required3. Be presented at a rate that

the operator can deal with4. Be easy to understand

Specifications of designDimensions: 30* 30* 30Power requirement: 12V, 5VAudio range: 40MMax. Number of alarms: 2Speed of sensing: HIGHLight in weightAlarm Graphical Warning display

Functional requirementsThe alarm system shall be explicitly designed to

take account of human factors and Limitations.

context sensitive.The alarm system design shall be based on an

alarm philosophy.The alarm system shall be properly

documented, and clear roles and responsibilities shall be established for maintaining and improving the system.

It should be easy for process experts to build into and maintain knowledge and intelligence in the alarm system over time.

Design requirementsStep Down TransformerRegulator Ics For 12v, 5vSensor- Pir Sensor2 Stage Opamp, ComparatorTransistor SwitchRelayLight Or LampAlarm Generator Or Buzzer

Architecture

SOFTWARE:The software used: Keil u-vision..

Flow chart: START

GIVE POWER TO ALARM SYSTEM

TEMP EXCEEDS ABOVE?

SWITCH ON THE ALARM AND WARNING LIGHTS

END

NO

YES

THANK YOU