Post on 14-Jun-2015
RAJASHREE.B
GSM Based Industrial Security System
Definition of embedded system
Examples of embedded systems.
EMBEDDED SYSTEM
Microprocessors and microcontrollers are widely used in embedded systems products.
Microcontroller is a programmable device.
Components present in the microcontroller
Microcontroller are used in the applications which cost and space are critical.
MICROCONTROLLER VS MICROPROCESSOR
They have only one memory block and one 8-bit data bus.
The CPU can either read an instruction or read/write data from/to the memory.
VON-NEUMANN ARCHITECTURE
HARVARD ARCHITECTURE
Microcontrollers using this architecture have two different data buses.
One is 8-bit wide and connects CPU to RAM memory.
Another one consists of several lines (12, 14 or 16) and connects CPU to ROM memory
ATmega48/88 Microcontroller has been programmed to sense the unauthorized person and fire.
SIM card is used in the modem.
GSM modem can be controlled by standard set of AT (Attention) commands.
In this module IR sensor, touch sensor, LDR sensor and temperature sensor are used.
MAIN APPLICATION OF PROJECT
Here ir, touch and ldr sensors are used for intruder alert through message to the concerned mobile number.
Temperature sensor is used for fire alert I.e. if there is very high temperature which acts as a source for fire then module gives an alert to the user
BLOCK DIAGRAM
HARDWARE COMPONENTS REQUIRED
ATmega32(8-bit microcontroller) LM 7805 MAX232 GSM MODEM IR SENSOR LDR TOUCH SENSOR TEMPERATURE SENSOR
PIN Diagram Of Micro Controller Of ATmega32
The microcontroller is at the core of every embedded module
The Atmega32is a low-power CMOS 8-bit microcontroller based on the AVR enhanced RISC architecture
LM 7805(VOLTAGE REGULATOR)
A voltage regulator based on an active device (such as a bipolar junction transistor, field effect transistor or vacuum tube) operating in its "linear region" and passive devices like zener diodes operated in their breakdown region.
MAX232 and DB9 connector(Level Converter)
We need a line driver to convert the RS232’s signals to TTL voltage levels that will be acceptable to the microcontroller’s TxD and RxD pins.
One example of such a converter is MAX232 from Maxim Corp. The MAX232 converts the RS232 voltage levels to TTL voltage levels, and vice versa.
GSM MODEMGSM modem is used for wireless data transfer.
The GSM Terminal is ideal for embedded applications. Modem can communicate serially by RS232.
The GSM module offers the advantages as below
• Small, lightweight and easy to integrate.
• Low power consumption
GSM MODEM
Descriptions of the pins used:
Power ON / OFF control
Tx
Rx
IR SENSOR
A Passive Infrared sensor (PIR sensor) is an electronic device that measures infrared (IR) light radiating from objects in its field of view.
LDR
LDRs or Light Dependent Resistors are very useful especially in light/dark sensor circuits.
TOUCH SENSOR
A touch sensor is classified as a high impedance device (or high impedance circuit) as the effect of a finger will be detected by the circuit connected to the plate.
TEMPERATURE SENSOR (LM35)
The LM35 series are precision integrated-circuit temperature sensor.
Calibrated directly in ° Celsius (Centigrade)
Suitable for remote applications
Operates from 4 to 30 volts
SOFTWARE REQUIREMENTS
CVAVR cross compiler
AVR studio programmer
Embedded C
ADVANTAGES
Much easier to have security.
Both risk and liability is reduced.
It is flexible enough to be used from any location.24 hrs/Day and 7 days a week.
APPLICATIONS
High end security for industries
High end security for museums.
High end security for colleges.
High end security for Offices.
CONCLUSION
The design approach used here has given satisfactory
results and the microcontroller is sufficient for measuring
the required parameters. The power consumption has
been kept as low as possible.
THANK YOU
ANY QUERIES ?