THE COMPANION -THE RECEIVER MODULE
This is the module, which contains the load the owner wants to carry with him. It's block diagram is shown below:
THE TRANSMITTER MODULE
This device is with the owner. This unit provides the GPS data (location), of the owner, and transmits it to the companion module.

This unit is small in comparison with that of the companion module, since it contains only few components like the GPS and the RF modules. Hence, this module will be of less weight and hence the owner will have no difficulty in carrying this small unit.
WORKING
Now we are going to see how they are brought together, and how they work
and accomplish their task.

The owner's location as well as that of the companion module is obtained from the GPS modules. The owner's location is transmitted to the companion module through the RF module.


The arduino controller present on the companion module will compute the distance between the two using the GPS modules available. And it will move towards the owner. The Ultrasonic sensor will pave way for a collision-less travel.
Thus this companion module will follow the owner and will deliver his load. Thus, it exactly does, what it was designed for.

SIMULATION
Before we started working on the hardware, we simulated the main functions of the project, and hence were able to get the output. Simulation was done in the 'Proteus' platform. We did two simulations on 1 .Primary motion test 2.Ultra Sonic test
ALGORITHM TRANSMITTER
1. Get human's latitude and longitude from the GPS.
2. Encode latitude and longitude into 2 values each ( 1 for integral part and other
for decimal part)
3. Transmit all the 4 values through RF communication.
4. Repeat steps 1 to 3.
RECEIVER
1. Get vehicle's latitude and longitude from the GPS.
2. Receive all the 4 values from the RF channel.
3. Decode them and obtain human's latitude and longitude data.
4. Calculate distance to human and his direction from the data.
5. Obtain Vehicle's direction from the magnetometer compass.
6. Match both the vehicle's direction and the human's direction by turning left or
right on the same axis.
7. Move the vehicle forward until either an obstacle is detected (or) destination is
reached.
8. If obstacle is detected, dodge it by moving left or right.
9. Repeat steps 1 to 8.

CONCLUSION
Man needs a companion to carry his loads and be of great use to him. When human beings are available to help others, this companion will be of great use to all kinds of people. Starting from senior citizens, this project will be of great help to all
ranges of people.
This project has scope in all places, starting from homes, to all public places like railway stations, airports, harbors and so on. This project has a great advantage of being scaled according to the application. Depending upon the place, this project's size and operating voltage can be changed.
This device is easy to construct, since it requires only small electronic parts, and a little bit of programming. Depending.on the loads to be carried, this project's
size will vary. Thus this project will definitely be a great use to every person who uses it.

REFERENCES
[1] Snehlata Sanjay Thakare ,Prof.SantoshKompelli "Design and implementation of dc motor speed control based on pic microcontroller" Volume - 3 Issue -9 September, 2014 Page No. 8075-8079 [2] Jong HoonAhnn "The Robot control using the wireless communication and the
serial communication" May 2007
[3] J.Parthasarathy "Positioning and Navigation system using GPS" International Archives of the Photogrammetry, Remote Sensing and Spatial Information Science, Volume XXXVI, Part 6, Tokyo Japan 2006
[4] Prakash Kumar, Pradeep Kumar "Arduino Based Wireless Intrusion Detection Using IR Sensor and GSM" International Journal of Computer Science and Mobile . Computing , IJCSMC, Vol. 2, Issue. 5, May 2013, pg.417 - 424
[5] DhirajArunPatil, SakshiVinodAgiwal "Design and Implementation of Mapping Robot using Digital Magnetic Compass and Ultrasonic Sensor" International Journal of Engineering Research & Technology, Volume. 4 - Issue. 06 , 2278-0181, June-2015

Claims:
1. To claim the design procedure and objectives used in the research work
2. To claim the procedure on transmitter receiver section
3. To claim for the driver circuit used in the controller IC
4. To claim for the GPS Module and GPS Guidelines