GLOBAL ALERT AND CONTROL SYSTEM FOR UPS BATTERY MANAGEMENT FOR CORPORATE AUTOMATION (GSM)

PURPOSE

To provide back up power supply to corporate, when main supply is below the required level, so that services of that corporate should not stopped.

ABSTRACT

In this project , we are using two transformers. One as mains supply to corporate and second transformer as secondary (UPS) supply. In the beginning we are giving the main supply by transformer one ,but if due

to some reason mains supply is not working. Then by power detector circuit this information goes to microcontroller and buzzer will produce an alarming sound. Microcontroller will send the message to authorized person by GSM modem

If person wants to continue the power supply by second transformer then that person has to send message to gsm modem. Whenever the gsm modem receives sms message to change the power supply connection it gives instruction to microcontroller .The microcontroller simply connects the second power supply and disconnects the existing supply using relay based control circuit.

BLOCK DIAGRAM

Power supply

Micro Controller

Lcd

Relay

Transformer 1

Buzzer Transformer 2

Gsm modem

Max232

Led Indicator

Power detector ckt

MICRO CONTROLLER AT89C51

The AT89S51 is a low-power, high-performance CMOS 8-bit microcontroller with 4K bytes of In-System Programmable Flash memory

The Major Features:

  4k Bytes of in-system Reprogrammable

flash memory Fully static operation: 0HZ to 24MHZ Three level programmable clock 128 * 8 –bit timer/counters Six interrupt sources Programmable serial channel Low power idle power-down modes 

POWER SUPPLY

A power supply can by broken down into a series of blocks, each of which performs a particular function. A d.c power supply which maintains the output voltage constant irrespective of a.c mains fluctuations or load variations is known as “Regulated D.C Power Supply”

For example a 5V regulated power supply system as shown below:

GSM MODEM

GSM modem (900/1800 MHz)

GSM/GPRS Smart Modem is a multi-functional, ready to use, rugged unit that can be embedded or plugged into any application. The Smart Modem can be controlled and customized to various levels by using the standard AT commands. The modem is fully type-approved, it can speedup the operational time with full range of Voice, Data, Fax and Short Messages (Point to Point and Cell Broadcast), the modem also supports GPRS (Class 2*) for spontaneous data transfer.

AT commands features: Line settings:

A serial link handler is set with the following default values Auto baud, 8 bits data, 1 stop bit, no parity, flow control.Command line

Commands always start with AT (which means attention) and finish with a <CR> character.

AT Returns a "OK" to confirm that modem is working

AT+CPIN="xxxx"  To enter the PIN for your SIM ( if enabled )

AT+CREG?A "0,1" reply confirms your modem is connected to GSM network

AT+CSQIndicates the signal strength, 31.99 is maximum.

BUZZER

The "Piezoelectric sound components" introduced herein operate on an innovative principle utilizing natural oscillation of piezoelectric ceramics.

These buzzers are offered in lightweight compact sizes from the smallest diameter of 12mm to large Piezoelectric sounders. Today, piezoelectric sound components are used in many ways such as home appliances, OA equipment, audio equipment telephones, etc.

RELAY

Relay is an electrically operated switch. Current flowing through the coil of the relay creates a magnetic field which attracts a lever and changes the switch contacts. The coil current can be on or off so relays have two switch positions and they are double throw (changeover) switches.

The relay's switch connections are usually labelled COM, NC and NO: COM = Common, always connect to this, it is the moving part of the switch. NC = Normally Closed, COM is connected to this when the relay coil is off. NO = Normally Open, COM is connected to this when the relay coil is on. Connect to COM and NO if you want the switched circuit to be on when the

relay coil is on. Connect to COM and NC if you want the switched circuit to be on when the

relay coil is off.

LIQUID CRYSTAL DISPLAY

LCD’s can add a lot to your application in terms of providing an useful interface for the user.

LCD is connected to microcontroller as 4 pins for data and a single pin for register select and enable,

The main application of LCD in this project is to display the status of MODEM, status of sensor etc.

Ж A  thin, flat electronic visual display that uses the light modulating properties of liquid crystals & do not emit light directly

Ж 16 pin ICЖ VEE- contrastЖ RS-REGISTER SELECTIONЖ 8 DATA PINSЖ EnableЖ R/W

MAX 232

The MAX232 is an integrated circuit that converts signals from an RS-232 serial port to signals suitable for use in TTL compatible digital logic circuits. The MAX232 is a dual driver/receiver and typically converts the RX, TX, CTS and RTS signals.

SCHEMATIC

SCHEMATIC DESCRIPTION

40th pin VCC (5v) 24th pin buzzer Xtal1&xtal2 connected to 33pf capacitors 31th(EA) pin connected to 104pf if using an internal

memory r grounded if using external memory 9th pin reset 21th pin connected to relay 1th pin connected to 7805 regulator 10th &11th connected to max 232

SOFTWARE

Keil u-Vision :

The µVision IDE from Keil combines project management, make facilities, to develop a program

Express PCB:A printed circuit board, or PCB, is used to mechanically support and electrically connect electronic components using conductive pathways

Express SCH: Used to draw the schematic diagram in the system

ISP (IN SYSTEM PROGRAMMING ):Used to dump the software to the microcontroller

  

PROGRAMMING LANGUAGE

Embedded CAn embedded system is an application that contains at least one programmable computer and which is used by individuals who are, in the main, unaware that the system is computer-based.

 Which programming language should you use?Having decided to use an 8051 processor as the basis of your embedded system, the next key decision that needs to be made is the choice of programming language.

Computers (such as microcontroller, microprocessor or DSP chips) only accept instructions in ‘machine code’ (‘object codes’). Machine code is, by definition, in the language of the computer, rather than that of the programmer. Interpretation of the code by the programmer is difficult and error prone.

All software, whether in assembly, C, C++, Java or Ada must ultimately be translated into machine code in order to be executed by the computer

ADVANTAGES

GLOBAL RANGE

LOW COST

LOW POWER REQUIREMENT

DISADVANTAGES

DELAYS IN MOBILE NETWORK

NEED OF A MOBILE PHONE ENTIRELY DEDICATED TO THE SYSTEM

APPLICATIONS

Home automation.Industrial automation.

  

FEATURES

In this project in future we can add a multimedia camera to see what is going inside the home by sitting in office or somewhere.

RESULT

The project “global alert and control system for ups battery management for corporate automation(gsm)” has been successfully designed and tested.

It has been developed by integrating features of all the hardware components used. Presence of every module has been reasoned out and placed carefully thus contributing to the best working of the unit. Secondly, using highly advanced IC’s and with the help of growing technology the project has been successfully implemented.

Quires

Thank you