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29-03-2012, 01:57 PM
HELLO SIR I AM AKANKSHA SHARMA MY PROJECT TITLE IS RF BASED METER THIEFT IDENTIFIER THROUGH PC. I WANT TO KNOW ABOUT SOME INFORMATION & POWER POINT PRESENTATION ABOUT THIS PROJECT .
DETAIL OF PROJECT-The project work “MICROCONTROLLER BASED POWER THEFT IDENTIFIER” is categorized into to two sections viz. Energy theft detection unit (Transmitter Section) located at consumer’s place and centralized detection and display unit using Microcontroller (Receiver Section) located at electrical sub-station, where the anti- power theft squad of the State Electricity Department monitor system continuously.
TRANSMITTER SECTION:
The energy theft identification unit located at energy consumer’s location consists of LDR configured in mono stable mode using IC 555 timer. The timer consists of two comparators, which are enabled at 1/3vcc and 2/3vcc. Thus as long as the light does not fall on the LDR, the output of the timer is at low state. Whenever the energy meter is opened or tampered, the light falls on LDR.
This makes the resistance of the LDR to fall to a low value of less than 500ohms from high value of more than 100Kohms. This in turn changes the threshold level of the timer and the output is made high. This will enable the relay driving transistor and in turn energizes the relay. This relay in turn provides supply to the tone generator circuit i.e., the modulating input block.
The audio tone generator is configured with 555 timer IC in astable mode. The frequency of the timer is selected with R-C of circuit. The audio tone generator generates tone frequency corresponding to the electric consumer involved in energy theft. In this project, for demonstration purpose, two theft detectors are provided. One is light sensing device and the other one is touch sensitive device, which generates 2 KHz and 3 KHz audio frequencies respectively. Output of both the tone generators are fed to the F.M Radio transmitter operating at 100MHz.
RECEIVER SECTION:
The circuit at centralized sub-station consists of F.M Radio receiver . In this case, it is used as a F.M detector and limiter with minimum of external components. This IC includes cascaded stages of IF limiter and balanced product detector with a very low harmonic distortion and high IF voltage gain. The detected signal of the FM receiver is fed to the audio amplifier, which amplifies the signal.
The amplified signal is fed to frequency to voltage converter that uses phase locked loop IC CD 4046 and multiplexer CD 4053. This frequency to voltage converter circuit converts the input frequency into output D.C voltage. The phase locked loop IC contains a stable, highly linear voltage controlled oscillator for low distortion F.M demodulation, and double balanced phased detection.
The characteristics of the closed loop system, bandwidth, response speed, capture and pull in range may be adjusted over a wide range with external resistors and capacitors. Thereby the D.C output voltage, which is proportional to the tone frequency, is fed to the analog to digital converter block.
Here, ADC0809 IC (8-bit A/D converter) is used to convert the output of frequency to voltage converter, which is an analog voltage, into an output binary word that can be used by a Microcontroller.
For monitoring and displaying of meter tampering (consumer number and address can be displayed on the LCD display which is connected at the output of Microcontroller) assembly language is used.
Languages used:- assembly language is used
PLEASE SEND ME POWER POINT PRESENTATION OF THIS PROJECT AND MODIFIED IT IF ANY
DETAIL OF PROJECT-The project work “MICROCONTROLLER BASED POWER THEFT IDENTIFIER” is categorized into to two sections viz. Energy theft detection unit (Transmitter Section) located at consumer’s place and centralized detection and display unit using Microcontroller (Receiver Section) located at electrical sub-station, where the anti- power theft squad of the State Electricity Department monitor system continuously.
TRANSMITTER SECTION:
The energy theft identification unit located at energy consumer’s location consists of LDR configured in mono stable mode using IC 555 timer. The timer consists of two comparators, which are enabled at 1/3vcc and 2/3vcc. Thus as long as the light does not fall on the LDR, the output of the timer is at low state. Whenever the energy meter is opened or tampered, the light falls on LDR.
This makes the resistance of the LDR to fall to a low value of less than 500ohms from high value of more than 100Kohms. This in turn changes the threshold level of the timer and the output is made high. This will enable the relay driving transistor and in turn energizes the relay. This relay in turn provides supply to the tone generator circuit i.e., the modulating input block.
The audio tone generator is configured with 555 timer IC in astable mode. The frequency of the timer is selected with R-C of circuit. The audio tone generator generates tone frequency corresponding to the electric consumer involved in energy theft. In this project, for demonstration purpose, two theft detectors are provided. One is light sensing device and the other one is touch sensitive device, which generates 2 KHz and 3 KHz audio frequencies respectively. Output of both the tone generators are fed to the F.M Radio transmitter operating at 100MHz.
RECEIVER SECTION:
The circuit at centralized sub-station consists of F.M Radio receiver . In this case, it is used as a F.M detector and limiter with minimum of external components. This IC includes cascaded stages of IF limiter and balanced product detector with a very low harmonic distortion and high IF voltage gain. The detected signal of the FM receiver is fed to the audio amplifier, which amplifies the signal.
The amplified signal is fed to frequency to voltage converter that uses phase locked loop IC CD 4046 and multiplexer CD 4053. This frequency to voltage converter circuit converts the input frequency into output D.C voltage. The phase locked loop IC contains a stable, highly linear voltage controlled oscillator for low distortion F.M demodulation, and double balanced phased detection.
The characteristics of the closed loop system, bandwidth, response speed, capture and pull in range may be adjusted over a wide range with external resistors and capacitors. Thereby the D.C output voltage, which is proportional to the tone frequency, is fed to the analog to digital converter block.
Here, ADC0809 IC (8-bit A/D converter) is used to convert the output of frequency to voltage converter, which is an analog voltage, into an output binary word that can be used by a Microcontroller.
For monitoring and displaying of meter tampering (consumer number and address can be displayed on the LCD display which is connected at the output of Microcontroller) assembly language is used.
Languages used:- assembly language is used
PLEASE SEND ME POWER POINT PRESENTATION OF THIS PROJECT AND MODIFIED IT IF ANY