International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395 -0056
Volume: 04 Issue: 04 | Apr -2017
p-ISSN: 2395-0072
www.irjet.net
VOICE CONTROLLED ROBOTIC ARM Abhinav Salim1, Ananthraj C R2, Prajin Salprakash3, Babu Thomas4 1Student,
Electrical and Electronics Engineering, Mar Athanasius College of Engineering, Kothamangalam Electrical and Electronics Engineering, Mar Athanasius College of Engineering, Kothamangalam 3Student, Electrical and Electronics Engineering, Mar Athanasius College of Engineering, Kothamangalam 4 Professor, Dept. of Electrical and Electronics Engineering, Mar Athanasius College of Engineering, Kerala, India 2Student,
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Abstract - This project presents a system whereby the human voice may specify continuous control signals to operate a real 3D robotic arm. Our goal is to help the people with disabilities by assisting them in their daily activities with the help of a robotic arm. It is indeed possible for a user to learn to move the position of real-world objects with a robotic arm using only non-verbal voice as a control mechanism. Individuals with motor impairments such as those with paraplegia, spinal cord injuries, war-time injuries, or amputations rely on others to assist them in their daily activities. Advances in assistive technologies have begun to provide an increase in independence for these individuals, but there is great potential for further technological developments to significantly improve their abilities, independence, and overall quality of life.
advantage to this stand-alone speech-recognition kit is its programmability. The user can program and train this kit to recognize the unique words which is to be recognized. The Speech Recognition kit can be easily interfaced to the robotic arm's CPU. The CPU is an Arduino Mega Microcontroller board. Microcontroller also provides a PWM signal for controlling the speed and direction of rotation of the motor. The PWM output of the controller is fed to two motor drivers that drive the motors of the robotic arm. 1.1 Block Diagram
KeyWords: Speech Recognition, Arduino microcontroller, Robotic arm, Motor driver, Impairments 1. INTRODUCTION The first term to be considered in voice control is Speech Recognition i.e. making the system to understand human voice. Speech recognition is a technology where the system understands the words (not its meaning) given through speech. At its most basic level, speech recognition allows the user to perform parallel tasks, while continuing to work with the computer or appliance. Use of robotic arm by people with disabilities provides a lot of independence in their daily life. The voice control provides a convenient and effortless way to control the robotic arm which can aid people who cannot move their hands. The robotic arm which we used for this project is a lightweight model which is controlled by four motors. The motors used are geared motors which are basically dc motors. They change the direction of rotation if the polarity is changed. Hence rotation in two directions is achieved. The automatic speech recognition system helps to understand spoken words which are recognized by a mike. The speech recognizer depends basically on HM2007 processor which is the heart of the speech recognizer. The analog voice input is transformed to digital commands. These commands are used as input to the arduino. An Š 2017, IRJET
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Fig -1: Block Diagram The block diagram in figure 1 shows all the major components that is required for a voice controlled robotic arm using a microcontroller. The voice inputs are given through a microphone to the voice recognition module. The digital output corresponding to the voice command is provided to the microcontroller ( it requires an external power supply of 5V ). Microcontroller will generate the control signals to operate the four motors of the robotic arm. These signals are given to the motor drivers (to meet the additional power requirements of the motors). Motor drivers control the direction of rotation of the four motors.
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