30-01-2012, 02:49 PM
DIGITAL WATER METER WITH LEAKAGE DETECTION
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INTRODUCTION
In a country like ours with a billion plus population nothing is sufficient. It takes a toll on government to provide even the basic necessities efficiently. The most pressing situation, rather one of the most basic is WATER related issues. As we are well aware of the fact that almost all parts of India are Monsoon dependent which in turns causes too much dependency on the same and leads to unpredictable situations. Every single drop of water counts and this is the high time to acknowledge this on a serious note.
EXPLANATION OF INDIVIDUAL BLOCKS
VALVE:
The pipe is being used to provide water flow. On this pipe electronic valve operating on 12v dc is provided which is controlled with the help of microcontroller.
RELAY & DRIVER CIRCUIT:
As microcontroller signal can`t be directly given to valve and in order to operate the valve we are using relay as a switch. But relay require 12V DC supply and 35mA current. The microcontroller can`t provide the required values of current and voltages so in order to provide the required values the driver circuit is used in the form of ULN2803. This driver circuit is operating at the range of +6V to +15V.
FLOW SENSOR:
The flow sensor is a mechanical assembly which consists of turbine that rotates due to pressure generated by the water flow. On this turbine shaft is mounted. The metallic disk with a small hole is mounted on the shaft.
SMART CARD:
EEPROM is used as a SMART CARD which will be storing the information of the individual customer. From which we can get customer’s entire data as and when required.
GSM MODEM:
GSM-MODEM is used to provide the E-RECHARGE to a customer whenever he is willing to. Here to interface GSM-MODEM & MICROCONTROLLER we are using serial communication circuit in the form of MAX 232 serial circuit.
LCD DISPLAY:
We are using 16*2 LCD display in order to display the amount of water used by the customer.
