Transcript 3.block diagram

Embedded Design Using ARM For
Strong Room Security System
Student Name
Guide Name
USN NO
H.O.D Name
Name Of The College & Dept
 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 :
BUFFER
RELAY
DRIVER
OUTPUT DEVICES
COMPARATOR
OPTOCOUPLER
LED SET
LDR
RELAY
DRIVER
M
RELAY
DRIVER
TO FAN FOR SPEED CONTROL
TEMPERATURE
COMPARATOR
OPTOCOUPLER
ARM PROCESSOR
SUPPLY
16 X 2 DISPLAY
DRIVER WITH
MONOSTABLE
+12 Volts
PIR
+5 Volts
230 V, AC
Supply
TRANSFORMER
RECTIFIER
FILTER
REGULATOR
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
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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