Design and implement a remote sensing and monitoring system running on a mobile robot with the ability to avoid obstacles in an unreachable area. A simple prototype mobile robot with built-in sensors has been designed and implemented to scan and monitor various variables in the environment. The teleoperation of such mobile robot is a challenging task that requires an efficient interface and a robust control in real time of the robot to avoid obstacles. The proposed system allows the user (base station) to send commands to the remote station (mobile robot), and receive scanned data and images of the environment through the Internet and the mobile DTMF signal. The hardware and software of the proposed system was implemented using the development software of PROTUS to obtain the appropriate design parameters. Real experiments have thus been performed to demonstrate system performance, including both ultrasonic teleoperation of mobile robot navigation to avoid obstacles, as well as real-time detection and monitoring in unreachable areas.
GPS and GPRS play specific roles, and are not competing technologies. GPS is an old military technology that now begins to mature in the market, since it was not long ago when the United States government gave full civil access. Full access allowed the receivers to locate their location within 10 feet, making it a viable tracking tool for navigation location and devices used in planes, boats, and their most popular use today, cars. Accuracy allows navigation devices to give you real-time directions. GPRS is a part of 2G technologies, and is quite old. In most parts of the developed world, GPRS has been replaced by superior 3G technology. It can be considered as the equivalent of dial-up for mobile phones.
The operation of both also differs significantly, since GPS receives information from satellites in low Earth orbit, while GPRS communicates with terrestrial cellular towers. GPRS needs only a cell tower with proper signal to function properly. GPS, on the other hand, needs three or more satellites because of the basic principles of trilateration. Due to the extreme height of satellites in orbit, you can use your GPS device anywhere in the world, even in the middle of the Pacific Ocean. GPRS is limited to cellular towers located on land.