APPLICATION OF DUAL TONE MULTI FREQUENCY TECHNOLOGY AND SENSING IN AUTONOMOUS ROBOTIC NAVIGATION

Vishveshwar Ramanathan Subramanian

Abstract: The goal of this project is to use DTMF decoders, sensors and micro-controllers to control autonomous navigation of a robot between a start and end point along a fixed path. This has very practical applications, eg. a mobile phone can be used to start the car and allow it to autonomously drive itself to a pick up point and vehicles in warehouses to carry goods from point A to point B, etc. A DTMF decoder is interfaced with the microcontroller, and a phone on auto answer mode is connected to the decoder. When the robot is called and a number on the user’s phone is pressed, the tone is sent to the decoder, which decodes and sends a signal to the microcontroller, and the robot is started. To avoid obstacles the robot has inbuilt Infrared sensors which detect obstacles and inform the microcontroller, which accordingly guides the robot. In this setup only three sensors were used given the limitation in terms of input ports. However, a greater number of sensors would allow for the robot to be aware of more specific situations. Therefore, it can be made more adaptable in varying situations. The test robot was programmed using Embedded C with AVR Studios. This approach uses existing technologies and is very inexpensive

Keywords: Drivers, Autonomous and Navigate

DOI: https://doi.org/10.15623/ijret.2013.0209007