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.

1. “DESIGN OF ALARM USING
PIR SENSOR FOR
TEMPERATURE
DETECTIONS”
Given by:
Akshay Dhole
13MMT1013 (Mechatronics)

2. 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.

3. 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

4. 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.

5.  Alarms should:
1. Be relevant to the operator's role
at the time
2. Indicate what response is required
3. Be presented at a rate that the
operator can deal with
4. Be easy to understand

6. Specifications of design
 Dimensions: 30* 30* 30
 Power requirement: 12V, 5V
 Audio range: 40M
 Max. Number of alarms: 2
 Speed of sensing: HIGH
 Light in weight
 Alarm Graphical Warning display

7. Functional requirements
 The 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.

9. Design requirements
 Step Down Transformer
 Regulator Ics For 12v, 5v
 Sensor- Pir Sensor
 2 Stage Opamp, Comparator
 Transistor Switch
 Relay
 Light Or Lamp
 Alarm Generator Or Buzzer

10. Architecture

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

12. Flow chart: START
GIVE POWER TO
ALARM SYSTEM
TEMP
EXCEEDS
ABOVE?
SWITCH ON THE ALARM
AND WARNING LIGHTS
END
NO
YES

13. THANK YOU