22-03-2010, 11:04 PM
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Unmanned Petrol Pump
Today almost all petrol pumps have a controlling unit to perform the tasks like managing the electrical pump, drive the display, measure the flow & accordingly turn OFF the electrical pump. But still a person is required to collect the money.
This project aims at designing a system to eliminate this human interaction so that there is no need of workers to fill the petrol. In this system all drivers have a smart card called as ËœPETRO CARDâ„¢. This ËœPetro Cardâ„¢ can be recharged at ËœRECHARGE POINTSâ„¢. At the Petrol Pump the driver swaps the card, the petrol pump is equipped with a RFID reader/write. The RFID reader reads the amount in the card & is displayed on the LCD. The driver then enters the quantity of petrol that has to be filled. The corresponding amount is calculated & deducted from the PETRO CARD. The electrical pump is then turned ON according to the entered amount.
This project benefits the consumers in the following ways:
1. The user need not carry any money with him. The petro card does everything.
2. Refuelling will be comfortable and carries on in a smoother way.
The microcontroller plays the key role performing all the tasks in a very systematic way. It reads the data from the smart card reader, processes the data, starts the pumping system to fill the tank upon the user request given through the keypad, displays the amount on the LCD, deducts the amount from the card based on the petrol fill and automatically turns off the pump.
Keypad is used as an input device allowing the user to enter the quantity of petrol to be filled in his vehicle tank.
LCD is used to display the number of units consumed by the user and display the related messages. LCD consumes low power and is a user friendly output device.
The microcontroller is interfaced with the smart card through MAX232. Serial communication will be established between the microcontroller and the smart card module.
Max232 IC is a specialized circuit which makes standard voltages as required by RS232 standards. This IC provides best noise rejection and very reliable against discharges and short circuits. MAX232 IC chips are commonly referred to as line drivers.
Buzzer is used for the audio indication at the time of turning on and turning off the pump.
