GPS controlled autonomous walking robot with ultrasonic sensor

Abstract

The Global Positioning System (GPS) is normally attached to modern cars. It is used to indicate the driver by voice signal to understand the current location and the directions to reach the target location In this research OK GPS is mounted on a walking robot in order to guide the robot along a specified path Autonomous walking robot is soon to become a very useful system for transporting maleriasl from one place to another. They can go even when the path is unstructured This can be used within a city/town or wiihin a restricted place such as hospital, campuses and industrial work places. When the GPS is used in the walking robot, the signal that is available in GPS unit has to be converted to relevant servo signal to drive the legs of robot. Hence there is an effort of signal processing and conversion to servo signal The GPS guided walking robot has to have a set of sensors and to have a good level of intelligence in order to take suitable decisions when encountered with obstacles, stationary or otherwise. The GPS has its own accuracy of identified location and this can vary between I to 5 meters. The GPS controlled robot reaching a target location with an acceptable accuracy is a standing problem. In this paper, a GPS guided walking robot is designed using an economical Garmin eTrex i'ista GPS. The problems of obstacle avoidance and accuracy in localization are addressed and methods are proposed for solving such problems.