Under the esteemed guidence of :J.KIRAN B.Tech M. Tech (Phd)

Assoc Professor, Dept. of ECE

Automatic Electronic Meter Reading System Using GSM

Presented By :

K.Kishore Kumar 08F31A0462M.Asha Jyothi 08F31A0467N.Lakshmi Devi Bai 08F31A0483P.V.S.R.Bharadwaja 08F31A0488

Scope of the Project

• Domain of the project : Embedded Systems

• Automatically read the meter reading • Reduce the human effort • Increase the accuracy

Conventional Electric Meter

Block diagram Tx

GMPR Section-2

OptoCoupler

• Electric circuit that transfers electricity between two other parts without allowing them to make a direct connection.

• OptoCoupler’s are most often used to separate two circuit elements that are operating on extremely different voltages

RelayAdvantages of relays: Relays can switch AC and DC, transistors can only switch DC. Relays can switch high voltages, transistors cannot.Relays are a better choice for switching large currents (> 5A). Relays can switch many contacts at once.

Disadvantages of relays: Relays are bulkier than transistors for switching small currents. Relays cannot switch rapidly (except reed relays), transistors can switch many times per second. Relays use more power due to the current flowing through their coil. Relays require more current than many chips can provide, so a low power transistor may be needed to switch the current for the relay's coil.

EEPROM• It is a type of non-volatile memory used in

computers• store small amounts of data that must be saved

when power is removed.• EEPROMs are realized as arrays of floating gate

transistors.• Main categories of these interface types are: 

Serial bus SPI,I2CParallel bus

Keypad

• There are basically two types of Keypad’s

» Matrix Keypad» Linear Keypad

Power Supply

LCD(Liquid Crystal Display)

Lcd interfacing to the controller

GSM (Global System for Mobile)

• 900MHz or 1800MHz

Characteristics of GSM Standard

• Fully digital system using 900,1800 MHz frequency band.

• TDMA over radio carriers(200 KHz carrier spacing).• 8 full rate or 16 half rate TDMA channels per carrier.• User/terminal authentication for fraud control.• Encryption of speech and data transmission over the

radio path.• Full international roaming capability.• Compatibility with ISDN.• Support of Short Message Service (SMS).

GSM Applications

• Mobile telephony• GSM-R• Telemetry System - Fleet management - Automatic meter reading - Toll Collection - Remote control and fault reporting of DG sets• Value Added Services

• ARM is a 32-bit reduced instruction set computer(RISC) instruction set architecture(ISA) developed by ARM Holdings

• The relative simplicity of ARM processors makes them suitable for low power applications

• 8-40Kb of on-chip static ram • 32-512Kb of on-chip flash memory • In System / In- application Programming via boot loader

software • 2 ADC’s containing 14channels • In-built RTC• 2 UART’s UART0 and UART 1 • Power down mode / Power saving • 8 Kb on-chip ram accessible to USB by DMA

Intro. to ARM 7--LPC2148

Applications

• Industrial control

• Medical systems

• Access control

• Point-of-sale

• Communication gateway

• Embedded soft modem

• General purpose applications

Advantages • Smart automated processes instead of manual work• Accurate information from the network load to optimise maintenance

and investments• Customized rates and billing dates.• Detection of tampering of Meters.• Accurate measurement of transmission losses.• Better network performance and cost efficiency.• Demand and distribution management.• More intelligence to business planning.• Better company credibility.

Working of the project• In this project we required operating voltage for ARM controller board is 12V. Hence the 12V D.C. power supply is needed for the ARM board . This regulated 12V is generated by stepping down the voltage from 230V to 18V now the step downed a.c voltage is being rectified by the Bridge Rectifier using 1N4007 diodes. The rectified a.c voltage is now filtered using a ‘C’ filter. Now the rectified, filtered D.C. voltage is fed to the Voltage Regulator. This voltage regulator provides/allows us to have a Regulated constant Voltage which is of +12V. The rectified; filtered and regulated voltage is again filtered for ripples using an electrolytic capacitor 100μF. Now the output from this section is fed to microcontroller board to supply operating voltage.

• In this project we have two sections , one section is in house and another section is in electricity board . In first section we are counting the units by using Digital energy meter and we are storing that data in eeprom (external memory ).when ever the request is received through gsm modem then we are sending the sms(units) to the another section .

• In second section we are using the RTC , hourly once we are sending the request to the first section. After receiving the units calculate the amount and send a sms the consumer.

Conclusion

• Integrating features of all the hardware components used have been developed in it. 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 with the help of growing technology, the project has been successfully implemented. Thus the project has been successfully designed and tested.

Future Enhancement

• This project can be extended by using GPRS and 3G technologies. Through GPRS, we can monitor the house from anywhere in the world and 3G technologies can be used to view the person through video calling option. Also introducing CDMA technologies into the project might be helpful which can prevent the tampering of the SIM cards.