24-02-2017, 09:57 AM
Electronic Metering technology has undergone rapid technological advances and there is an increased demand for a reliable and efficient automatic meter reading system (AMR). This article presents the design of an inexpensive wireless GSM energy meter and its associated web interface to automate the billing and global management of the data collected. The proposed system replaces traditional meter reading methods and allows remote access of the existing power meter by the power supplier. They can also monitor meter readings regularly without the person visiting each home. A GSM-based wireless communication module integrates with each entity's electronic power meter to gain remote access to electricity usage. A PC with a GSM receiver on the other end, which contains the database acts as a billing point. The meter reading of the GSM enabled energy meter is periodically sent to this billing point and these details are updated in a central database. A new interactive and friendly graphical user interface is developed using Microsoft Visual Studio .NET framework and C #. With proper authentication, users can access the details of the web page developed from anywhere in the world. The full monthly usage and the expired invoice are sent back to the customer after processing this data.
Working:
In this automatic reading of meters based on GSM, a led is connected in parallel to the led 'cal' of the meter reading. This LED is paired with an LDR, which acts as an Optocoupler. The LDR output is connected to the base of the NPN transistor and the collector output of the transistor is connected to the P1.0 pin of the micro-controller. So at each meter reading led flashing, a signal is passed to the micro-controller to count the pulses of the meter reading. Then the micro-controller updates the reading and displays it on LCD and also stores it in the EEPROM. The LCD and EEPROM are connected to port 0 of the micro-controller. To transfer the data a GSM modem is used, which sends SMS to the defined mobile phone number. The micro-controller is programmed to send the SMS after every 10 meter reading pulses. The MAX232 is used to interconnect the GSM modem, there is another GSM modem also available that does not require MAX232, which can be connected directly to the micro-controller.
Circuit:
Working:
In this automatic reading of meters based on GSM, a led is connected in parallel to the led 'cal' of the meter reading. This LED is paired with an LDR, which acts as an Optocoupler. The LDR output is connected to the base of the NPN transistor and the collector output of the transistor is connected to the P1.0 pin of the micro-controller. So at each meter reading led flashing, a signal is passed to the micro-controller to count the pulses of the meter reading. Then the micro-controller updates the reading and displays it on LCD and also stores it in the EEPROM. The LCD and EEPROM are connected to port 0 of the micro-controller. To transfer the data a GSM modem is used, which sends SMS to the defined mobile phone number. The micro-controller is programmed to send the SMS after every 10 meter reading pulses. The MAX232 is used to interconnect the GSM modem, there is another GSM modem also available that does not require MAX232, which can be connected directly to the micro-controller.
Circuit: