Comprehensive Report: Voice Controlled Robotic System Analysis

This report provides a comprehensive overview of voice-controlled robotic systems. It begins with an executive summary highlighting the benefits of these systems, including their use in dangerous environments and for assisting disabled individuals. The report then delves into the introduction, explaining the components like electrical, mechanical, and computing technologies. It discusses the preliminary design, including the use of smartphones and Bluetooth modules for voice command processing. The detailed design section covers hardware components such as microphones, PCs, and communication devices, as well as specifications like microcontrollers, motor drive ICs, and DC motors. The report also outlines different design approaches and includes schematic diagrams. Further, it explains the function of voice and speech recognition, and the use of the application of the mobile that is used to convert the voice commands to the digital sequence of words. The report also contains the system tests, evaluation, validation and optimization, conclusion, and recommendations.

Report on the Voice Controlled Robotic System 1
REPORT ON THE VOICE CONTROLLED ROBOTIC SYSTEM
A Report Paper on Robotic System By
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Executive Summary
This report is about the voice-controlled robotic system that is found to be very
beneficial. The robots are the packages of the system like electrical, mechanical, the
technology of automation field, and computing that can be used to do many tasks in the
domestic and industrial use. With the increasing development of the robots, the field can be
controlled now the lesser human intervention that is direct to achieve more natural machines
interaction. A method to accomplish such is to control the robot through the command.
Some of the application of the robots that utilize recognition of the voice is to help
disabled people by just executing the present command. To process a voice command, the
easiest way is to use a smartphone. Smartphones are devices that are powerful and function
like a computer, with their independent operating system and their internet connection makes
then being used in many applications. The major feature that is normally used is Bluetooth
that allows the phone to communicate with a robot.
Voice controlled robotic systems are very beneficial to the areas that are too dangerous
for a human to enter. The voice-controlled robotic systems are controlled using voice
commands received through the android device. These commands after they are issued to the
android application on the phone of the user that is connected to the robots using the
Bluetooth module. Then will be received by the module after the RF channel is relayed with
the commands.

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TABLE OF CONTENT
Item Page
INTRODUCTION……………………………………………………………….…….4
Preliminary Design ……………………………………………………….…….……..5
Detailed Design and Development………………………………………….…….…..6
System Test……………………………………………………..…………………….11
Evaluation………………………………………………………….………………...12
Validation and Optimization………………………………………………………...13
CONCLUSION………………………………………………………………………14
Recommendation……………………………………………………………………16
Bibliography…………………………………………………………………………18

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INTRODUCTION
Robots are the packages of the system like electrical, mechanical, the technology of
automation field, and computing that can be used to do many tasks in the domestic and
industrial use. With the increasing development of the robots, the field can be controlled now
the lesser human intervention that is direct to achieve more natural machines interaction. A
method to accomplish such is to control the robot through the command. Some of the
application of the robots that utilize recognition of the voice is to help disabled people by just
executing the present command. To process a voice command, the easiest way is to use the
smartphone. Smartphones are devices that are powerful and function like a computer, with
their independent operating system and their internet connection makes then being used in
many applications. The major feature that is normally used is Bluetooth that allows the phone
to communicate with a robot.
Voice controlled robotic systems are very beneficial to the areas that are too dangerous
for the human to enter. The voice-controlled robotic systems are controlled using voice
commands received through the android device. These that the after they are issued to the
android application on the phone of the user that is connected to the robots using the
Bluetooth module. The commands will be received by the module after the RF channel is
relayed with the commands. The goal of the voice-controlled robot is to listen to the act of the
commands from the user and then the device after some training will start understanding the
commands (Johnstone, 2015)
Both the speech and recognition of the voice use the human voice recordings but they act
differently. Voice recognition stripes the personal differences in word detection. Recognition
of the speech disregard the meaning of the language to detect physical person behind the
speech. Robots have some of the characteristics like, ability to sense environment through

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giving it some sensors like sensors of the light sonar sensor, sensor touch and sensor of the
chemical. Also, they have the ability to move by rolling wheels walking and sometimes
propelling. Robots are very intelligent, they are able to be smart by programming so that what
it's supposed to do can be clarified. The combination system of a robot comprises the sensors,
control system, software, and the supply of the power that enable it to perfume task. Also,
they are able to power themselves through solar, battery of the electrical (M, 2011)
Preliminary design of the voice-controlled robot
The existing is a speech recognition system. The recognition of the speech is the
process of capturing words that are spoken using the telephone or the microphone and words
conversion digitally sets of the words. The speech recognition quantity is assessed according
to accuracy and speed. Once the sample of the speech is recorded, the pattern of the person's
speech is tested in the database to make sure that the voice matches with the claimed identity.
Also, the verification of speaker is needed sometimes where the secure access is needed
(Ratkliff, 2015).
Figure 1: Preliminary Design of a Voice Controlled Robotic Vehicle
The voice-controlled robotic systems are controlled using voice commands received
through the android device. These commands after they are issued to the android application
on the phone of the user that is connected to the robots using the Bluetooth module. The
commands will be received by the module after the RF channel is relayed with the
commands. The goal of the voice-controlled robot is to listen to the act of the commands

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from the user and then the device after some training will start understanding the commands
(administration, 2013)
Transmitters: on the section of the transmitter, the commands are given to the application of
the mobile through the handset mobile of the microphone. This mobile handset is connected
to the moving robot via the module of the Bluetooth. The application of the mobile that is
used is programmed that the commands of voice given to the handset is received by the
microphone and analogue commands of voice are converted to the digital sequence of words.
This sequence that is stored are then transmitted to the robot through the Bluetooth module of
the transceiver and are sent to controller transceiver (deficit, 2017).
Receiver: the transceiver controller is used to decode serial communication and the signal
with the module of the Bluetooth. The controller compares the commons of the stored
programs and the digital signal in it and converts them to the string of the voice. The voice
strings are used to run the robot for the desired interval of time
Detailed design of the system of the voice-controlled robot
Hardware
The microphone receives the speech and then the speech is converted or processed to the
PC when the robot's commands are recognized, the command message is sent from the PC to
the computer of the robot that is inbuilt using the signals of infrared. The computer of the
robot analyses the message and appropriate action are taken (engineers, 2016).
Microphone: the microphone is the part that receives the speech. A microphone should be a
device of high quality with the built-in noise filters. The input quality is related directly to the
rate of speech recognition. The rate of recognition of the speech can be lower when using a
microphone of low quality.

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PC: the signals of the speech reprocessed on this PC. The computer within the robot should
have the COM port for the sender of infrared. It also should have all the requirements of the
running software on the machine
The commands allow to the robot, the building units of the robots are the sensor and the
motors. A computer is also placed to control the robot. The software is also present for the
communication in the PC (society, 2014).
The devices for communication: the commands are sent to the robot from the PC using the
signals of the infrared. The RCX has the transceiver that is built in. another transceiver is
connected to the port of the COM on the PC. Long and short term transmissions are switched
at the PC. The best conditions are when the transceiver are close to each other. it is used to
write programs to the board
In order to design a voice-controlled robot, the following are some of the
specifications that are required for any design: 8051 Series microcontroller, Motor drive IC,
Battery, DC motor, Robot body, Crystal, Voltage regulator, Bluetooth device, Keil Micro
Vision IDE, MC programming language (Embedded C) and Android app. There are three
different ways of designing this kind of voice-controlled robot: (Johnstone, 2015, p. 78). The
following were the different kinds of designs that the group members came up with: This is
where the principal parts are represented by blocks and connected by lines and arrows which
the relationship of the blocks. Contents are normally hidden so as to avoid being distrusted by
details (.J, 2001).
Microcontrollers: It contains a memory, processor core, peripherals for input and output.
They are used in automatically controlled devices such as automobile control system,

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Power supply (PRS): Regulated Power Supply converts a constant DC from unregulated AC
with the assistance of the rectifiers.
Bluetooth module: It is a component of the hardware that a wireless output to work with the
computer. It can also be in the form of headphone or even cell phone. It creates a personal
wireless network.
Crystal (LCD): They are normally used in the fax, laser printers and networking devices like
routers. The screen of the LCD comes in small number with one row of eight characters;
there are also large characters (A, 2014).
Motor Drivers: A driver is an electronic component used to control another electronic
device; they are used to regulate the flow of current through a circuit, It acts as a current
amplifier because it takes a low current signal and gives a high current which is used to drive
the motor hence regulating the current in the circuit, the drivers will also regulate the rotation
of the motor.
Microcontroller and Microprocessor: Microcontroller is a computer on a chip, it has the
complete feature contained in microprocessor CPU and register, and it also has added a
feature that is needed to make a complete computer like ROM and RAM. Microprocessors
are meant to be general purpose computer that is digital whereas microcontrollers are meant
to be special purpose controllers that are digital. (Alrcon, 2000)
Microprocessors are usually used as Central Processing Unit {CPU} while microcontrollers
are found in small components design doing control oriented activities.
8051 Microcontroller: The AT89S52 has a low power but with a high-performance
CMOS8)-bit microcontroller and with 8k bytes of system flash programmable memory. The
AT89S52 gives the following standard features; 8k bits of flash, 256 bits of RAM, 2 data

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pointers with the logic for operation down to 0 frequencies which support two software. The
89s52 has four ports each with eight output and input lines giving a sum of 32 output and
input line
Voltage Regulator: It is the regulator that is electric that is designed to keep the level of
voltage constant. The 78xx also known as LM78xx is a family fixed linear voltage regulator
IC. It is popular for many electronics circuit that requires a supply of the power that is
regulated because it is cheap and easier to use (Asimov, 2004).
DC Motor: It is made to be driven by power of the electrical DC, the most common types of
DC motor are the Brushless motor DC, brush motor DC and Coreless DC motor which use
both communications externally or internally to create an oscillating AC from the source of
DC. This is the elements representation of any system by use of symbols, graphics, symbols
and abstract and not just features that are real. It omits irrelevant details to the information to
be taken and may add elements that are compressive. The schematic diagram for the voice-
controlled robotic project is as shown below. As in the diagram below, there is an idea about
every pin connection of microcontroller involves in the robotic project. The various
components involved in the project are:
Android app: It was designed by the inventory of the app and its function are to control the
robot. These applications of the android are very important as they are used to design and are
given as follow: Bluetooth AMR and Bluetooth SPP test. It will give a voice command only
and not the typing command (Grimmett, 2012).

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Figure 2: Detailed Design of a Voice Controlled Robotic System (Johnstone, 2015)
Crystal: Is the circuit of electric that creates signals off electric with a specific frequency
from a mechanical resonance of crystals vibrating of a material that piezoelectric. It is used in
time tracking, so a stable signal of the clock is given for circuits that are integrated digitally
integrated.
Motors: A DC motor runs with an electric power that is DC in nature.
Microcontroller: It is a computer on a chip. It combines all the design found in the register
and microprocessor CPU.
Motor Driver IC: It is the amplifier of the current because they provide a high signal of the
currents when low current signals are taken which is used to drive the motor. (Detroit, 2017,
p. 290)
Voltage regulator: Is the regulator that is electrical which is designed to keep level of voltage
constant gotten in devices like computer power supply for stabilizing the voltage of DC used
by the processors (Grimmett, 2012)
Battery: This is the power source for the robot; it can be rechargeable or not chargeable by
solar for the cost reduction

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This is the overall representation of the voice control robot, and we can connect every pin of
the microcontroller of the project. The voice control robot is applied in areas such as military
application, wheelchairs, home automation and surveillance device
Software: in this project, the Keil software was used. The Keil C 51 is the most used because
it has many characteristics and also its speed of assembling language is very high. This
language provides many details to all resource of the 8051 microcontrollers. The c51 also
translates the source files of c into module objects that can be transferred that every symbol
information for fixing (administration, 2013).
Embedded C: It is the extended language combination for the programming language of C. It
needs a non-standard extension to the language C for it to support specific features like bank
memory.
It is based on the information provided to the mobile phone from Android via Bluetooth
connection to the robot using Bluetooth modem. When a command is given by an Android
phone to receive and transmit the information signal, it moves in the direction of the
command. The power supply is given to the robot by the battery which is capable of running
the robot.
System test
The system's functionality can be divided into two parts, the part of speech
recognition that will be responsible for the phases of recognition and the part of controlling
the robot which will be responsible for the reactions that are right to the command.

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Speech recognition part: first, the recognition part should get tested, to make the test with the
Results that are quantitative are difficult. With the speech, it's not possible to control the
variable fully because people have a different voice. Also one cannot say the exact phrase in
the same manner. The background noise will also vary. So the design test was designed in a
more approach of qualitative (Thomassen, 2010). Different people with different ascent
should speak so as to test the system of the voice-controlled the robot. The test is done in a
room that has little noise. After practising for some time, the people should now present
command from the easiest to the complex, like back, stop, and performance are registered
and results are evaluated without statistical data.
Robot control part: the part of robot control is also tested and is much easier. If the command
is not clearly recognized, the command can again be spoken until it's recognized correctly. A
list should be made with the commands of the representative and the needed results should be
specified. Then the commands should be spoken, when the recognition is false, the
commands are again spoken until the command that is right are recognized. The results are to
be recorded and compared with the right ones (Thomassen, 2010)
Evaluation
Most of the components of the robot will change in future drastically because of the
technological developments. The liquid crystal display technology is expected to expand