CONTENTS 1.Abstract 2.Objectives 3.Block diagram 4.Methodology 5.Advantages & disadvantages 6.Applications 7. Conclusion.

CONTENTS

1. Abstract

2. Objectives

3. Block diagram

4. Methodology

5. Advantages & disadvantages

6. Applications

7. Conclusion

1.ABSTRACT:

Aiming at the characters of wireless sensor network and intelligent room

security system, this article studied a sort of intelligent room security

system based on wireless sensor network. Through establishing the

structure frame of alarming system, in this article, we designed the sensor

nodes of alarming system, put forward the hardware design methods of

sensor nodes for the alarming system, designed the software of alarming

system through the combination of software and hardware, adopted the

license technology to enhance the security and veracity of the transmission

of alarming information. The experiment indicated that the system had

certain practical value because of its convenient operation and reliable

stability.

2.OBJECTIVES:

“To save energy, make efficient utilization of power”.

3.BLOCK DIAGRAM :

SUPPLY

M

LED SET

TO FAN FOR SPEED CONTROL

OUTPUT DEVICES

HARDWARE REQUIREMENTS: ARM 7 / Cortex M3, LCD, Relay Driver, Relays, Resistors, Capacitors, LEDs, Crystal, Diodes, Transformer, Voltage Regulator, Push Button.

SOFTWARE REQUIREMENTS: Keil compiler uVision 4, Language: Embedded C or Assembly, WLPRO Programmer

230 V, AC Supply

TRANSFORMER RECTIFIER FILTER REGULATOR

+12 Volts

+5 Volts

BUFFER DRIVER RELAY

16 X 2 DISPLAY

ARM PROCESSOR

COMPARATOR

OPTO-COUPLER

RELAY DRIVER

RELAY DRIVER

COMPARATOR OPTO-COUPLER

PIR

DRIVER WITH MONOSTABLE

LDR

TEMPERATURE

4. METHODOLOGY:

PIR Sensor:

The space to be monitored is divided by the lens into a number of zones.

The number of zones depends on the number of segments of which the lens

is composed. When somebody moves from one zone to other, there is a

change in temperature which is collected by the lens as a variation in

radiant energy. As the focus of the lens is a hydroelectric sensor which

reacts to such a change by generating a small electric signal. That signal is

processed and used to actuate/deactivate the appliances.

LDR Sensor:

Depending on the natural light intensity number of LED should

be switched ON and OFF. This operation should be performed using

COMPARATOR and ARM. When ever the light intensity in a room

varies depending on that a digital signal has to be generated using

COMPARATOR which should be given to the MSP430 . In controller a

decision has to be made that how many LED should turn ON or OFF. In

above fig 2 a LED array is shown in 4 numbers, because a single LED

array consists of 9 LED’s therefore totally 3 1.

  Depending on the natural light intensity these array should be

controlled. If intensity of natural light is minimum then only LED array 1

should glow (9 LED’s), if there is no natural light then complete 4 LED

array should glow. And if there is a continuous variation in natural light

intensity then depending up on variation in light intensity either LED

arrays are selected. It means at a time it may be single or double or treble

or all LED arrays may be switched ON and OFF.

Temperature Sensor:

In room any temperature will vary then that given to the

COMPARATOR, depending on that a digital signal has to be generated

using COMPARATOR which should be given to the ARM. In controller a

decision has to be made that fan should turn ON or OFF.

5. ADVANTAGES & DISADVANTAGES:

ADVANTAGES:

1.Unnecessary wastage of electricity can be controlled to a greater extend.

2.Maximum power can be saved.

3.Electrical safety is designed to prevent device damage & electrical

shocks.

4.Selectable Sensitivity, Sensitivity can be adjusted to match installation

requirements.

5.Wide supply voltage range: 3.0V to 15V in COMPARATOR.

6.Walking up to the regulators board to change the fan speed is avoided.

7.Fan regulators are eliminated.

DISADVANTAGES:

In this project usage of relays leads to consume more power.

6.APPLICATIONS:

1. Forest fire detection.

2. Landslide detection.

3. Water quality monitoring.

4. Natural disaster prevention .

5. Industrial monitoring

7.CONCLUSION:

An embedded strong room security can be a very simple grouping

of controls, or it can be heavily automated where any appliance that is

plugged into electrical power is remotely controlled. Costs mainly include

equipment, components, furniture, and custom installation. Ongoing costs

include electricity to run the control systems, maintenance costs for the

control and networking systems, including troubleshooting, and eventual

cost of upgrading as standards change. Increased complexity may also

increase maintenance costs for networked devices.

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