16-09-2016, 04:24 PM
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Abstract-This paper demonstrates the research and
implementation of voice automated fire extinguisher vehicle.
The vehicle is controlled through connected speech input. The
language input allows a user to interact with the robot which is
familiar to most of the people. The advantages of speech
activated robots are hands-free and fast data input operations.
The speech recognition system is trained in such a way that it
recognizes defined commands and the designed robot navigates
based on the instruction through the Speech Commands. The
medium of interaction between humans and computers is on the
processing of speech. The complete system consists of three
subsystems, the speech recognition system, transmitter section
and the receiver section (on vehicle) .We have studied the
various factors such as noise which interferes speech
recognition and distance factor. The results prove that
proposed robot is capable of controlling fire, avoiding obstacles
and understanding the meaning of speech commands.
INTRODUCTION
The project aims at designing an intelligent voice
operated fire extinguishing robotic vehicle which can be
controlled wirelessly through RF communication. The
Robotic vehicle has a camera mounted on it whose direction
can also be controlled using voice commands. The proposed
vehicle has a water jet spray which is capable of sprinkling
water. The sprinkler can be moved towards the required
direction.
A lot of work has been done earlier in the field of
word recognition.Using a traditional recognizer an accuracy
of around 60% has previously been obtained for both a 156
town name task and 1108 road name task. Techniques
presented in [Azzopardi/Semnani_et_al:1998]has resulted in
an accuracy of 90% for an automated corporate directory
system with 120,000 entries. As an input method for rapidly
spreading small portable information devices, and advanced
robotics applications, development of speaker independent
speech recognition technology which can be embedded on a
single DSP chip has been developed by
[Hoshimi/Yamada_et_al:1998].
When the newly proposed noise robustness method
was tested with 100 isolated word vocabulary speech of 50
subjects, recognition accuracy of 94.7% was obtained under
various noisy environments. Software engineering for
research and development in the area of signal processing is
by no means unimportant. A programming paradigm which
allows software components to be advantageously combined
witheach other in a way that recalls the concept of hardware
plug-and-play, without the need for incorporating complex
schedulers to control data flows has been developed by
[Dutoit/Shroeter:1998].Earlier similar work in a limited input
domain was done using wireless for e.g. remote control of
electrical switches (this is currently one of the ingenuity
problems). We read a newspaper report about an year ago
(TheHindu - Thursday Science & Technology Section) about
such a project. A suggested application was for hospitalized
patients who usually are dependent on someone else for to
switch on/off the lights,fan, etc. But what if the patient's
hands are broken. Obviously a voice based system ought to
be used in such a case.
A voice recognition unit built around a high speed
processor that ensures various operations of the system to be
performed by voice command. The Program of the project is
written in Visual basic language for controlling robot motor
from the PC’s parallel port termed as printer port (LPT).
The Program accepts the input in decimal numbers and
outputs at the data output pins of the PC’s parallel port for
controlling the connected devices. Our project controls left,
right, forward and backward movement of robot wirelessly
within 500m range using 433 MHz RF frequency. The
special feature of our project is that our visual basic program
control window based voice recognizing software. So for
controlling any movement of robot we have to just speak
name of movement. The voice recognizing software compare
our voice with already stored voice, if match found robot
start executing command according to voice command,
otherwise it give error massage. At the receiver side of robot
8051 microcontroller is also used. The microcontroller takes
command wirelessly transmitted by PC. The role of
microcontroller is to drive 7 segments, drive DC motor, take
input from temperature sensor and night light sensor and
drive relays.
II.IMPLEMENTATION FRAMEWORK
The controlling devices of the whole system are
Microcontrollers. Speechrecognition module, wireless
transceiver modules, obstacle detector, lamp, waterjetspray,
DC motors and buzzer are interfaced to Microcontroller.
When the user fed the voice commands to the speech
recognition module, the microcontroller interfaced to itreads the command and sends relevant data of that command
wirelessly using transceiver module. This data is received by
the transceiver module on the robotic vehicle and feds it to
TRANSMITTER SECTION
Optocouplers are used which consists of an infrared
light-emitting diode (LED) and an npn phototransistor.
When a high going pulse is available on the data pin, the
internal LED drives the phototransistor of optocoupler
MCT2E and it provides an enable pulse to HT12E encoder.
All address pins of HT12E is grounded. Thus the data
encoded by HT12E will be 0111. This encoded data is
available at pin 17 of HT12E. The RF transmitter frequency
modulate data signal and transmits using antenna. For RF
transmission purposed it is needed to encode the signal
generated at computer parallel port with the help visual basic
code. B.RECEIVER SECTION
HT 12D Receive and decode 12 bit encoded data
transmitted by HT12E, for further processing. The HT12D is
12 bit decoders are a series of CMOS LSIs for remote
control system applications. They are paired with Holtek’s
2^12 series of encoders. For proper operation, a pair of
encoder/decoder with the same number of addresses and data
format should be chosen. The decoders receive serial
addresses and data from a programmed 2^12 series of
encoders that are transmitted by a carrier using an RF
transmission medium. They compare the serial input data
three times continuously with their local addresses. If no
error or unmatched codes are found, the input data codes are microcontroller which acts accordingly on motors, pump and
lamp. The vehicle is mounted with a camera which helps in
viewing the live images on TV.
Figure.1 Functional flow chart
A. TRANSMITTER SECTION
Optocouplers are used which consists of an infrared
light-emitting diode (LED) and an npn phototransistor.
When a high going pulse is available on the data pin, the
internal LED drives the phototransistor of optocoupler
MCT2E and it provides an enable pulse to HT12E encoder.
All address pins of HT12E is grounded. Thus the data
encoded by HT12E will be 0111. This encoded data is
available at pin 17 of HT12E. The RF transmitter frequency
modulate data signal and transmits using antenna. For RF
transmission purposed it is needed to encode the signal
generated at computer parallel port with the help visual basic
code. B.RECEIVER SECTION
HT 12D Receive and decode 12 bit encoded data
transmitted by HT12E, for further processing. The HT12D is
12 bit decoders are a series of CMOS LSIs for remote
control system applications. They are paired with Holtek’s
2^12 series of encoders. For proper operation, a pair of
encoder/decoder with the same number of addresses and data
format should be chosen. The decoders receive serial
addresses and data from a programmed 2^12 series of
encoders that are transmitted by a carrier using an RF
transmission medium. They compare the serial input data
three times continuously with their local addresses. If no
error or unmatched codes are found, the input data codes are
decoded and then transferred to the output pins. The VT pin
also goes high to indicate a valid transmission. The 2^12
series of decoders are capable of decoding information that
consist of N bits of address and 12_N bits of data. Of this
series, the HT12D is arranged to provide 8 address bits and 4
data bits.
Abstract-This paper demonstrates the research and
implementation of voice automated fire extinguisher vehicle.
The vehicle is controlled through connected speech input. The
language input allows a user to interact with the robot which is
familiar to most of the people. The advantages of speech
activated robots are hands-free and fast data input operations.
The speech recognition system is trained in such a way that it
recognizes defined commands and the designed robot navigates
based on the instruction through the Speech Commands. The
medium of interaction between humans and computers is on the
processing of speech. The complete system consists of three
subsystems, the speech recognition system, transmitter section
and the receiver section (on vehicle) .We have studied the
various factors such as noise which interferes speech
recognition and distance factor. The results prove that
proposed robot is capable of controlling fire, avoiding obstacles
and understanding the meaning of speech commands.
INTRODUCTION
The project aims at designing an intelligent voice
operated fire extinguishing robotic vehicle which can be
controlled wirelessly through RF communication. The
Robotic vehicle has a camera mounted on it whose direction
can also be controlled using voice commands. The proposed
vehicle has a water jet spray which is capable of sprinkling
water. The sprinkler can be moved towards the required
direction.
A lot of work has been done earlier in the field of
word recognition.Using a traditional recognizer an accuracy
of around 60% has previously been obtained for both a 156
town name task and 1108 road name task. Techniques
presented in [Azzopardi/Semnani_et_al:1998]has resulted in
an accuracy of 90% for an automated corporate directory
system with 120,000 entries. As an input method for rapidly
spreading small portable information devices, and advanced
robotics applications, development of speaker independent
speech recognition technology which can be embedded on a
single DSP chip has been developed by
[Hoshimi/Yamada_et_al:1998].
When the newly proposed noise robustness method
was tested with 100 isolated word vocabulary speech of 50
subjects, recognition accuracy of 94.7% was obtained under
various noisy environments. Software engineering for
research and development in the area of signal processing is
by no means unimportant. A programming paradigm which
allows software components to be advantageously combined
witheach other in a way that recalls the concept of hardware
plug-and-play, without the need for incorporating complex
schedulers to control data flows has been developed by
[Dutoit/Shroeter:1998].Earlier similar work in a limited input
domain was done using wireless for e.g. remote control of
electrical switches (this is currently one of the ingenuity
problems). We read a newspaper report about an year ago
(TheHindu - Thursday Science & Technology Section) about
such a project. A suggested application was for hospitalized
patients who usually are dependent on someone else for to
switch on/off the lights,fan, etc. But what if the patient's
hands are broken. Obviously a voice based system ought to
be used in such a case.
A voice recognition unit built around a high speed
processor that ensures various operations of the system to be
performed by voice command. The Program of the project is
written in Visual basic language for controlling robot motor
from the PC’s parallel port termed as printer port (LPT).
The Program accepts the input in decimal numbers and
outputs at the data output pins of the PC’s parallel port for
controlling the connected devices. Our project controls left,
right, forward and backward movement of robot wirelessly
within 500m range using 433 MHz RF frequency. The
special feature of our project is that our visual basic program
control window based voice recognizing software. So for
controlling any movement of robot we have to just speak
name of movement. The voice recognizing software compare
our voice with already stored voice, if match found robot
start executing command according to voice command,
otherwise it give error massage. At the receiver side of robot
8051 microcontroller is also used. The microcontroller takes
command wirelessly transmitted by PC. The role of
microcontroller is to drive 7 segments, drive DC motor, take
input from temperature sensor and night light sensor and
drive relays.
II.IMPLEMENTATION FRAMEWORK
The controlling devices of the whole system are
Microcontrollers. Speechrecognition module, wireless
transceiver modules, obstacle detector, lamp, waterjetspray,
DC motors and buzzer are interfaced to Microcontroller.
When the user fed the voice commands to the speech
recognition module, the microcontroller interfaced to itreads the command and sends relevant data of that command
wirelessly using transceiver module. This data is received by
the transceiver module on the robotic vehicle and feds it to
TRANSMITTER SECTION
Optocouplers are used which consists of an infrared
light-emitting diode (LED) and an npn phototransistor.
When a high going pulse is available on the data pin, the
internal LED drives the phototransistor of optocoupler
MCT2E and it provides an enable pulse to HT12E encoder.
All address pins of HT12E is grounded. Thus the data
encoded by HT12E will be 0111. This encoded data is
available at pin 17 of HT12E. The RF transmitter frequency
modulate data signal and transmits using antenna. For RF
transmission purposed it is needed to encode the signal
generated at computer parallel port with the help visual basic
code. B.RECEIVER SECTION
HT 12D Receive and decode 12 bit encoded data
transmitted by HT12E, for further processing. The HT12D is
12 bit decoders are a series of CMOS LSIs for remote
control system applications. They are paired with Holtek’s
2^12 series of encoders. For proper operation, a pair of
encoder/decoder with the same number of addresses and data
format should be chosen. The decoders receive serial
addresses and data from a programmed 2^12 series of
encoders that are transmitted by a carrier using an RF
transmission medium. They compare the serial input data
three times continuously with their local addresses. If no
error or unmatched codes are found, the input data codes are microcontroller which acts accordingly on motors, pump and
lamp. The vehicle is mounted with a camera which helps in
viewing the live images on TV.
Figure.1 Functional flow chart
A. TRANSMITTER SECTION
Optocouplers are used which consists of an infrared
light-emitting diode (LED) and an npn phototransistor.
When a high going pulse is available on the data pin, the
internal LED drives the phototransistor of optocoupler
MCT2E and it provides an enable pulse to HT12E encoder.
All address pins of HT12E is grounded. Thus the data
encoded by HT12E will be 0111. This encoded data is
available at pin 17 of HT12E. The RF transmitter frequency
modulate data signal and transmits using antenna. For RF
transmission purposed it is needed to encode the signal
generated at computer parallel port with the help visual basic
code. B.RECEIVER SECTION
HT 12D Receive and decode 12 bit encoded data
transmitted by HT12E, for further processing. The HT12D is
12 bit decoders are a series of CMOS LSIs for remote
control system applications. They are paired with Holtek’s
2^12 series of encoders. For proper operation, a pair of
encoder/decoder with the same number of addresses and data
format should be chosen. The decoders receive serial
addresses and data from a programmed 2^12 series of
encoders that are transmitted by a carrier using an RF
transmission medium. They compare the serial input data
three times continuously with their local addresses. If no
error or unmatched codes are found, the input data codes are
decoded and then transferred to the output pins. The VT pin
also goes high to indicate a valid transmission. The 2^12
series of decoders are capable of decoding information that
consist of N bits of address and 12_N bits of data. Of this
series, the HT12D is arranged to provide 8 address bits and 4
data bits.