08-02-2010, 11:33 AM
[attachment=1836]
GSM based SCADA implementation using Microcontroller
The purpose of this project is to acquire the remote electrical parameters like Voltage, Current and Frequency and send these real time values over GSM network using GSM Modem/phone. This project is also designed to protect the electrical circuitry by operating an Electromagnetic Relay. This Relay gets activated whenever the electrical parameters exceed the predefined values. The Relay can be used to operate a Circuit Breaker to switch off the main electrical supply.
User can send commands in the form of SMS messages to read the remote electrical parameters. This system also can automatically send the real time electrical parameters periodically (based on time settings) in the form of SMS. This also can be designed to send SMS alerts whenever the Circuit Breaker trips or whenever the Voltage or Current exceeds the predefined limits.
This project makes use of an onboard computer which is commonly termed as micro controller. This onboard computer can efficiently communicate with the different sensors being used. The controller is provided with some internal memory to hold the code. This memory is used to dump some set of assembly instructions into the controller. And the functioning of the controller is dependent on these assembly instructions.
The objectives of the project include:
1. Sensing different electrical parameters (voltage, current, temperature).
2. Display those parameters.
3. Forwarding the electrical parameters over GSM network.
4. Producing buzzer alerts (if necessary).
5. Controlling the electrical appliances.
The project provides us exposure on:
1. Initialization of ADC module of microcontroller.
2. Embedded C program.
3. PCB designing.
4. Different electrical sensors.
5. Interfacing sensors to controller.
6. LCD interfacing.
The major building blocks of this project are:
1. Microcontroller Mother Board with regulated power supply.
2. LCD display to show the measured electrical parameters.
3. Electromagnetic Relay to control Electrical Appliances.
4. Temperature Sensor.
5. Voltage Sensor.
6. Current Sensor.
7. GSM Modem/phone for remote communication.
Block Diagram:
