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Abstract: Security and automation is a prime
concern in our day-to-day life. The approach
to home and industrial automation and
security system design is almost standardized
nowadays. In this paper, we have tried to
increase these standards by combining new
design techniques and developed a low cost
home and industrial automated security
systems. Everyone wants to be as much as
secure as possible. The design of simple
hardware circuit enables every user to use this
wireless home security system with PIR
sensor, Gas sensor, Smoke sensor and Main
fuse Failure Detector at Home & Industries.
I.INTRODUCTION
Home security is the most significant one for
every homeowner either in an individual house
or an apartment. To get the absolute peace of
mind whether you are at home or out of home
you must ensure that your home is installed with
the perfect home security monitoring system.
This GSM Bases industrial security system can
be used to provide security system for
residential, industrial, and for all domestic and
commercial purposes using GSM technique.
Security systems are certain electronic devices
which are used to detect intrusions in home or
industry. The basic components of a home
automation security system are motion detectors,
LPG detectors and smoke detector. It is cheaper
and can be maintained easily than any other
security device.
When the user is away from home or industry, all
the sensors are activated by switching on the
Security system. Whenever systems experiences
a abnormal condition in the industry like any
fire/smoke occurs in the home/industry and any
intrusion into the home/industry the Security
system alerts the security personnel as well as the
owner of the industry by sending SMS alerts to
the users of the home/industry. In the system
along with security, industrial lighting is also
activates based on the lighting available in the
industry. The system operates with the help of
sensors installed in this system.
Existing systems
1. Wired System,
2. RF Based Security System,
3. Web enabled Security System.
4.
Disadvantage of Existing Systems
1. Difficult to maintain
2. Need internet access
3. Distance.
Proposed System
The proposed system uses GSM module
which enables us to know the security status of
home/industry when we are away from the
home/industry.
II. ARCHTECTURE OF THE SYSTEM
It can be implemented to any levels of the
security system. The architecture of the system
mainly consists of three components the GSM
MODEM and the interface circuit that include
the different sensors used. The function of the
GSM MODEM is the remote communication between the user and the controller through the
RS232 serial communication standard. The
function of the controller is to continuously
check the inputs coming from the different
sensor and send message through the GSM
network in case of emergency.
The microcontroller is connected to different
devices like smoke detector, motion detector
through relays. The GSM connected to the user,
police station, and fire brigade through the
mobile cellular network. An interface circuit has
been designed which includes sensors as input
devices. Then the programmed microcontroller
has been connected to the interface circuit and
the GSM MODEM through the serial port of the
GSM MODEM
SENSING DEVICES
PROXIMITY SENSOR
A proximity sensor is a sensor able to detect the
presence of nearby objects without any physical
contact.
A proximity sensor often emits an
electromagnetic field or a beam of
electromagnetic radiation (infrared, for
instance), and looks for changes in the field or
return signal. The object being sensed is often
referred to as the proximity sensor's target.
It is the same principle in ALL Infra-Red
proximity sensors. The basic idea is to send infra
red light through IR-LEDs, which is then
reflected by any object in front of the sensor.
Then all you have to do is to pick-up the reflected
IR light. For detecting the reflected IR light, we
are going to use a very original technique: we are
going to use another IR-LED, to detect the IR
light that was emitted from another LED of the
exact same type. This is an electrical property of
Light Emitting Diodes (LEDs) which is the fact
that a LED produces a voltage difference across
its leads when it is subjected to light. As if it was
a photo-cell, but with much lower output current.
dependant resistor also knows as a LDR,
photo-resistor, photoconductor or photocell, is a
resistor whose resistance increases or decreases
depending on the amount of light intensity.
LDRs (Light Dependant Resistors) are a very
useful tool in a light/dark circuits. LDRs can
have a variety of resistance and functions. For
example it can be used to turn on a light when the
LDR is in Darkness or to turn o a light when the
LDR is in light. It can also work the Other way
around so when the LDR is in light it turns on the
circuit and when it’s in darkness the resistance
increase and disrupts the circuit.
GAS AND SMOKE SENSOR
A gas detector is a device that detects the
presence of gases in an area, often as part of a
safety system. This type of equipment is used to
detect a gas leak and interface with a control
system so a process can be automatically shut
down. A gas detector can sound an alarm to
operators in the area where the leak is occurring,
giving them the opportunity to leave. This type
of device is important because there are many
gases that can be harmful to organic life, such as
humans or animals.
TYPES OF SMOKE SENSORS
The sensor is composed of micro Al2O3 ceramic
tube. Tin dioxide sensitive layer, measuring
electrode and heater are fixed into crush made
by plastic and a stainless steel net. The heater
provides necessary work condition for work
SERIAL COMMUNICATION–RS232
A popular way to transfer commands and data
between a personal computer and a
microcontroller is the use of standard interface,
like the one described by protocols RS232
(older) or USB (newer). This chapter is devoted
to communication conforming to RS232
protocol, the hardware for such interface is
provided onboard. An example will be presented
showing the processing of commands received
through RS232 interface, and sending of a string
of numbers using the same interface.
The microcontroller includes up‐to six hardware
modules to deal with RS232 signals. Some of the
modules additionally implement other
communication protocols, like I2C, CAN, SPI;
module named UART4 will be used in this
experiment. Its detailed description can be found
in RM0090, chapter 26. The voltage level
translator is added on the test board, and is
industry standard chip MAX3232. The Signals
TX and RX are available at connector P580,
pins3 and 2 respectively. The RS232 signals RX
and TX are available as alternate functions
replacing the regular port bits, and corresponding
port pins Must be properly initialized software
OP-AMP LM324
The LM324 series are low−cost, quad
operational amplifiers with true differential
inputs. They have several distinct advantages
over standard operational amplifier types in
single supply applications. The quad amplifier
can operate at supply voltages as low as 3.0 V or
as high as 32 V with quiescent currents about
one−fifth of those associated with the MC1741
(on a per amplifier basis). The common mode
input range includes the negative supply, thereby
eliminating the necessity for external biasing
components in many applications. The output
voltage range also includes the negative power
supply voltage.
The LM324 series is made using four internally
compensated, two−stage operational amplifiers.
The first stage of each consists of differential
input devices Q20 and Q18 with input buffer
transistors Q21 and Q17 and the differential to
single ended converter Q3 and Q4. The first
stage performs not only the first stage gain
function but also performs the level shifting and
transconductance reduction functions. By
reducing the transconductance, a smaller
compensation capacitor (only 5.0 pF) can be
employed, thus saving chip area. The
transconductance reduction is accomplished by
splitting the collectors of Q20 and Q18. Another
feature of this input stage is that the input
common mode range can include the negative
supply or ground, in single supply operation,
without saturating either the input devices or the
differential to single−ended converter. The second stage consists of a standard current
source load amplifier stage.
SIM900-GSM/GPRS Module
GSM (Global system for mobile
communication) is a cellular network. GSM
network operate in four different frequency
ranges. Most GSM network operates in 900 MHz
or 1800 MHz bands. The transmission power in
the handset is limited to a maximum of 2 watts
GSM 850/900/300 and 1watt in 1800/1900. The
longest distance the GSM specification supports
in practical use is 35Km (22 mi). In this paper we
use SIM900a based GSM modem to receive and
send short message to user and system