...CHAPTER-1 INTRODUCTION The global focus on terrorism and security may have geared up following the 9/11 attacks in the USA. The risk of terrorist attack can perhaps never be eliminated, but sensible steps can be taken to reduce the risk. The issue here is how seriously do the governments take the threat of terrorism…Post-Limburg, we cannot continue to hope for the best and ignore the lessons. Our Prime Minister Manmohan Singh also mentioned in a speech last year that Indian soldiers will soon have robots assisting them to counter terrorist attack. We are yet to hear more on that thought. The word “robot” was first used in a 1921 play titled R.U.R.: Rossum’s Universal Robots, by Czechoslovakian writer Karel Capek. Robot is a Czech word meaning “worker.” Merriam-Webster defines robot as “a machine that looks like a human being and perform various complex acts; a device that automatically performs complicated, often repetitive tasks; a mechanism guided by automatic controls.” ISO describes a robot as “an automatically controlled reprogrammable, multipurpose manipulator programmable in three or more axes, which may be either fixed in place or mobile for use in industrial automation applications. “ Yet, all these definition do give us a rough idea about what comprises a robot, which needs to sense the outside world and act accordingly. There are motors, pulleys, gears, gearbox, levers, chains, and many more mechanical systems, enabling locomotion. There are sound, light, magnetic...
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...Chapter 1: INTRODUCTION Almost all machines in industries are operated using electrical motors. Among them most of the motors are DC motors. DC series motor is specially used for traction, electric locomotive, trolley systems, crane and conveyer belt. All these works require frequent speed control for the preparation of job. We could gear the motor for the proper speed, but this is usually beyond scope of what we can accomplish in the basement workshop or we could measure the current that the motor draws and determine a series resistor value according to ohms law to insert to “drop” the motor supply voltage and slow the motor down. The problem with this approach is that if load on the motor increases, the motors operating current also increases, creating a larger voltage drop across that series resistor and supplying less voltage to the motor terminals when it is needed the most. This “vicious circle” usually results in the motor stalling at high load conditions. So what we need is a controller that will give the motor a kick of supply voltage for a variable amount of time to achieve the proper speed without the series dropping effect. A PWM (Pulse width modulation) wave can be used to control the speed of the motor. CHAPTER 2 WIRELESS COMMUNICATIONS Wireless communication is the transfer of information over distance without the use of electrical conductors or “wire”. The distances involved maybe short (a few meters as in television remote control) or long (thousands or...
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...A VOICE GUIDANCE SYSTEM FOR AUTONOMOUS ROBOT Neha Dingwani Email: nehadingwani3@gmail.com Pranali Sonawane Email: pranalis93@gmail.com Sanjivani Yesade Email: Sanjivani.yasade@gmail.com Vishal Motwani Email: rvmotwani960@gmail.com ABSTRACT In this paper, a voice guidance system for autonomous robots is proposed as a project based on microcontroller. The proposed system consists of a microcontroller and voice recognition software that can recognize a limited number of voice patterns. The commands of autonomous robots are classified and are organized such that one voice recognition software can distinguish robot commands under each directory. Thus, the proposed system can distinguish more voice commands than one voice recognition processor can. I. ------------------------------------------------- INTRODUCTION This Project Describe a robot that can be operated by voice commands given from user. The project use speech recognition system for giving and processing voice commands Speech recognition, or speech-to-text, involves capturing and digitizing the sound waves, converting them to basic language units or phonemes. It is the ability of a computer to recognize general, naturally flowing voice from a wide variety of users. The robot will receive commands from user and do the actions like left, right, back, front etc. The robot will detect the obstacles, fire and gas using sensor and do the work like if robot detect obstacle it moves in different direction, if...
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