seminar.pptx
- 1. R.B.S.E.T.C Seminar on -: Substation Supervision Submitted by- Manvendra Gupt E.E (1700420907) Submitted to- Upendra Sir (Ast. Pro.)
- 2. CONTENTS • Objective • Introduction • Block Diagram • Working Principle • Advantages • Applications • Limitations • Future Scope of Work • Conclusion
- 3. OBJECTIVE The objective of this project is to design and develop a wireless communication link to monitor and control equipments that are far away from the user and also develop a high security system to keep a check on them.
- 4. INTRODUCTION • The proposed system is based on ATMEL 89S52 microcontroller. • The transmitter is a mobile phone which uses certain codes corresponding to a particular relay to which the device is connected. • At the receiver, the GSM modem receives the message from the mobile phone and gives it to the microcontroller which acts to control the devices.
- 5. BLOCK DIAGRAM RF TRANSMITTER RF RECEIVER GSM TRANSMITTER GSM RECEIVER RF Receiver M I C R O C O N T R O L L E R (at 89s52) RF decoder gsm modem max 232 Table Fan (Device 1) relay 1 Table Lamp (Device 2) relay 2 LCD Display Buzzer memory at24c04 Power supply (lm 7805) Sensor RF Encoder RF Transmitter
- 6. WORKING PRINCIPLE • At the transmitter side, the user sends an SMS to the GSM modem using AT commands indicating which device is to be controlled. • At the receiver side, Microcontroller controls the devices through relays depending on the code received by the GSM modem.
- 7. POWER SUPPLY The microcontroller and other devices get power supply from AC to Dc adapter through 7805, 5 volts regulator. The adapter output voltage will be 12V DC non regulated.
- 8. GSM MODEM • GSM Modem is a multi-functional, ready to use, rugged unit that can be embedded or plugged into any application. • The Modem can be controlled and customized to various levels by using the standard AT commands.
- 9. GSM MODEM(CONT…) The modem comprises several interfaces:- • LED Function including operating Status • External antenna • Serial and control link • Power Supply • SIM card holder
- 10. COMMANDS FOR SMS OPERATIONS Device ON •(PASSWORD) SYSTEM1 ON# Device OFF •(PASSWORD) SYSTEM1 OFF# Device ON •(PASSWORD) SYSTEM2 ON# Device OFF •(PASSWORD) SYSTEM2 OFF# CHECH THE STATUS •(PASSWORD) STATUS#
- 11. MICROCONTROLLER- AT89S52 • The AT89S52 is a low-power, high- performance CMOS 8-bit micro controller with 8K bytes of in-system programmable Flash memory. The device is manufactured using Atmel’s nonvolatile memory technology . • It is a powerful microcontroller which provides a highly-flexible, cost effective solution to many embedded control applications. • The code written is downloaded into the microcontroller chip using an universal programmer.
- 12. MAX232 • MAX232 was created for one purpose, to interface between Data Terminal Equipment (DTE) and Data Communications Equipment (DCE) employing serial binary data interchange. • So as stated the DTE is the terminal or computer and the DCE is the modem or other communications device.
- 13. EEPROM • electrically erasable and programmable read only memory (EEPROM) is organized as words of 8 bits each. Features: • 2-Wire Serial Interface (I2C protocol) • High Reliability Vital role of External EEPROM memory : To store the status of the relay
- 14. RELAY • Relays use an electromagnetic coil to move the poles of a switch when powered. There are three pairs of connections known as common, normally open and normally closed. • The center terminal block is the common (CO) connection and is connected to either the upper or lower terminal block depending on the state of the relay. • Vital role of RELAY: Switch on/off the device according to the microcontroller commands.
- 15. PCB • A printed circuit board, or PCB, is used to mechanically support and electrically connect electronic components using conductive pathways. • electronic component have wire leads, and the PCB has holes drilled for each wire of each component. The components' leads are then passed through the holes and soldered to the
- 16. ADVANTAGES • The status of various devices can be monitored and controlled from anywhere. • The operation of the system is very simple and can be used by anyone with a basic knowledge of operating mobile phones. • Easy to upgrade as per the user requirement.
- 17. APPLICATIONS • Home Automation • Office Automation • Industrial Automation • To control water pump sets in agricultural fields. • The security system can be employed in household or any organization.
- 18. LIMITATIONS • If the main module or the handset is not in the cellular range ,we can’t control the devices. • The sensors use RF transmitter and receiver which has limited range, hence sensors have to be in close vicinity of the main module
- 19. FUTURE SCOPE OF WORK • It can be used for high security in banks and other organizations. • Using real time clock, the appliances which need response in real time can also be Controlled through the wireless link . • Connecting More Devices. • Provision To Store Several Mobile Numbers • Video Recording Once Alarm Gets
- 20. CONCLUSION • We presented an approach that can be employed to improve the performance of various devices that are not in the close vicinity of the user. • The usability of the design was verified by controlling a table fan and a table lamp. • The user was informed about the action through a reply SMS sent by the modem at the receiver.
- 21. THANK YOU…