The purpose of this project is to control the valve opening/closing of a petrol tanker wirelessly at predefined locations only using GPS (Global Positioning System) and RF (Radio Frequency) technologies. This system helps in avoiding stealing of the fuel. The valve of the tanker is opened/closed when the location is matched and also it receives instruction for opening/closing wirelessly. GPS receiver is used to locate the position of the tanker and RF is used to give the instructions of opening/closing the valve of the tanker.   RF Communication ranges in between 30 KHz to 300 GHz. RF communication works by creating electromagnetic waves at a source and being able to pick up those electromagnetic waves at a particular destination. These electromagnetic waves travel through the air at near the speed of light. The wavelength of an electromagnetic signal is inversely proportional to the frequency; the higher the frequency, the shorter the wavelength.   The GPS is the acronym for Global positioning system. This GPS receiver is capable of identifying the location of an object on earth in the form of latitude and longitudes. The GPS gives the data received from the satellites. For this information the GPS communicates with at least three satellites in the space.   The controlling device of the whole system is a Microcontroller. The input and output devices are interfaced to the Microcontroller. The microcontroller is loaded with an intelligent program written for a specific application. In this project the microcontroller continuously checks for the location of the tanker as well as input instruction for valve control remote and acts accordingly on the stepper motor connected to valve. The feedback operations can be seen on LCD display.        

The main objectives of the project are:  

1. Locating the tanker location using GPS technology.
2. Wireless Valve control.

         

The major building blocks of this project are:  

1. Regulated power supply.
2. Microcontroller.
3. GPS receiver.
4. Stepper/DC motor with driver.
5. LCD display.
6. RF transmitter and RF receiver.
7. Encoder and Decoder.

           

Software’s used:  

1. PIC-C compiler for Embedded C programming.
2. PIC kit 2 programmer for dumping code into Micro controller.
3.  Express SCH for Circuit design.

       

Regulated Power Supply:

                     

Block Diagram:

       

video: