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Lalitha Gosukonda
Lalitha Gosukonda

The document describes an electronic safety assistance system for blind people using a microcontroller and DSP voice processor. The system uses an IR transmitter and receiver to detect obstructions, and notifies the user via a voice processor and buzzer. It is designed to help blind people safely reach their destinations by warning them of detected objects through audio cues. The system's main components are an MCS51 microcontroller, IR transmitter and receiver, buzzer, and DSP voice processor. It operates by transmitting and receiving IR signals to detect reflections from objects, and triggering an audible response from the voice processor and buzzer upon detection.

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VELAGAPUDI RAMAKRISHNA SIDDHARTHA ENGINEERING COLLEGE ELECTRONIC SAFETY ASSITANCE FOR BLIND USING MICROCONTROLLER AND DSP VOICE PROCESSER PRESENTTED BY G.LALITHA
ABSTRACT The main of aim this application is to providing assistance for the blind people against obstruction. The blind people has to wear the equipment, the equipment transmits IR communication code into the free space. The reflected IR communication code received by the same microcontroller. The reflection is take place and it’s give a voice response at the equipment
INTRODUCTION  In order to help the blind people to reach their destination safely this equipment is designed.  The application is designed using the microcontroller and dsp voice processor to assist the blind people. Hence the application is given the name “Electronic safety assistance for blind using microcontroller and dsp voice processor”.
THE MAIN COMPONENTS USED IN THIS APPLICATION Micro-Controller MCS51 Series, 89C52 IR Transmitter IR Receiver Buzzer DSP voice processor
BLOCK DIAGRAM DSP Voice DSP VOICE PROCESSOR Processor
CRITERIA FOR CHOSSING AT89C52 MICROCOMTOLLER • The AT89C52 is a low power ,high performance cmos 8 bit Microcontroller with 8K bytes of in-system programmable flash memory. The device is manufatured using atmel’s high density nonvolatile memory Technology. • AT89C52 is a powerful microcontroller that provides a highly flexible and Cost effective solution.
MICROCONTROLLER DESCRIPTION It supports the two software selectable power saving modes one is ideal mode and other is power down mode 32 Programmable I/O Lines. Three 16-bit Timer/Counters. Eight Interrupt Sources. It has 256 bytes of internal RAM.
IR TRANSMITTER AND IR MODULATOR
 IR led is used as the IR transmitter.  IR modulator is an astable multivibrator Generates 35KHz frequency while receiving bit0 from TDX of the microcontroller.  TDX pin of the microcontroller generates 35KHz IR frequency, the frequency is emitted by the IR led with help of driver transistor.
IR LED  Infrared emitting diode is a high intensity diode, molded in a blue transparent plastic package.  A light-emitting diode (LED) is a semiconductor light source.  When a light-emitting diode is forward biased (switched on), electrons are able to recombine with electron holes within the device, releasing energy in the form of photons. This effect is called electroluminescence.
 Infrared LEDs are also used in the remote control units of many commercial products including televisions, DVD players, and other domestic appliances.  For infrared LED’s, the light output is not visible by our eyes, but can be sensed by a variety of electronic devices
IR RECEIVER CONNECTED TO MICROCONTROLLER
 The receiver is having IR photo diode and IR processing comparator Opamp.  It has 3 pins one is connected to gnd, other is vcc, 3rd pin is data pin.  The data received at RDX pin of the microcontroller converts into Parallel subsequently stores in serial buffer.
DSP VOICE PROCESSOR APR9301 V2  The APR9301 device offers true single-chip solid-state storage capability and requires no software or microcontroller support.  It provides high-quality recording and playback with a single 20to 30-second message  Low power consumption  User-friendly, easy-to-use operation
OPERATING MODES There are four operating modes in the APR9301 V2 voice processor. They are: Record Mode (Level-Activated) Playback Mode (Edge-Activated) Standby Mode (/CE = "0") Power Down Mode (/CE = "1")
BUZZER • A buzzer or beeper is a signaling device, usually electronic, typically used in automobiles, household appliances
ADVANTAGES Advantages: • As IR transmitter and receiver are inexpensive • Power consumption is very low • The equipment is less in size, hence it can be easily carried
FUTURE SCOPE The IR rays are not omnidirectional. They exhibit line of sight property. Due to this reason the person can only identify the obstruction that is straight to him. Inorder to cover the entire region surrounding the person the system can be developed using RFID transmitter and can be used more effectively in future.
FLOWCHART
CONCLUSION In this work the methodology of detecting any obstruction is described. The application helps in providing assistance for the blind people against the obstruction. Whenever it detects the object, it intimates the user through voice processor and the buzzer.
REFERENCES http://www.maxim-ic.com http://www.atmel.com http://www.wikipedia.org http://www.google.co.in http://www.ehow.com http://www.8051projects.net http://www.keil.com
Lalitha ppt
Lalitha ppt

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Lalitha ppt

  • 1. VELAGAPUDI RAMAKRISHNA SIDDHARTHA ENGINEERING COLLEGE ELECTRONIC SAFETY ASSITANCE FOR BLIND USING MICROCONTROLLER AND DSP VOICE PROCESSER PRESENTTED BY G.LALITHA
  • 2. ABSTRACT The main of aim this application is to providing assistance for the blind people against obstruction. The blind people has to wear the equipment, the equipment transmits IR communication code into the free space. The reflected IR communication code received by the same microcontroller. The reflection is take place and it’s give a voice response at the equipment
  • 3. INTRODUCTION  In order to help the blind people to reach their destination safely this equipment is designed.  The application is designed using the microcontroller and dsp voice processor to assist the blind people. Hence the application is given the name “Electronic safety assistance for blind using microcontroller and dsp voice processor”.
  • 4. THE MAIN COMPONENTS USED IN THIS APPLICATION Micro-Controller MCS51 Series, 89C52 IR Transmitter IR Receiver Buzzer DSP voice processor
  • 5. BLOCK DIAGRAM DSP Voice DSP VOICE PROCESSOR Processor
  • 6. CRITERIA FOR CHOSSING AT89C52 MICROCOMTOLLER • The AT89C52 is a low power ,high performance cmos 8 bit Microcontroller with 8K bytes of in-system programmable flash memory. The device is manufatured using atmel’s high density nonvolatile memory Technology. • AT89C52 is a powerful microcontroller that provides a highly flexible and Cost effective solution.
  • 7. MICROCONTROLLER DESCRIPTION It supports the two software selectable power saving modes one is ideal mode and other is power down mode 32 Programmable I/O Lines. Three 16-bit Timer/Counters. Eight Interrupt Sources. It has 256 bytes of internal RAM.
  • 8. IR TRANSMITTER AND IR MODULATOR
  • 9.  IR led is used as the IR transmitter.  IR modulator is an astable multivibrator Generates 35KHz frequency while receiving bit0 from TDX of the microcontroller.  TDX pin of the microcontroller generates 35KHz IR frequency, the frequency is emitted by the IR led with help of driver transistor.
  • 10. IR LED  Infrared emitting diode is a high intensity diode, molded in a blue transparent plastic package.  A light-emitting diode (LED) is a semiconductor light source.  When a light-emitting diode is forward biased (switched on), electrons are able to recombine with electron holes within the device, releasing energy in the form of photons. This effect is called electroluminescence.
  • 11.  Infrared LEDs are also used in the remote control units of many commercial products including televisions, DVD players, and other domestic appliances.  For infrared LED’s, the light output is not visible by our eyes, but can be sensed by a variety of electronic devices
  • 12. IR RECEIVER CONNECTED TO MICROCONTROLLER
  • 13.  The receiver is having IR photo diode and IR processing comparator Opamp.  It has 3 pins one is connected to gnd, other is vcc, 3rd pin is data pin.  The data received at RDX pin of the microcontroller converts into Parallel subsequently stores in serial buffer.
  • 14. DSP VOICE PROCESSOR APR9301 V2  The APR9301 device offers true single-chip solid-state storage capability and requires no software or microcontroller support.  It provides high-quality recording and playback with a single 20to 30-second message  Low power consumption  User-friendly, easy-to-use operation
  • 15. OPERATING MODES There are four operating modes in the APR9301 V2 voice processor. They are: Record Mode (Level-Activated) Playback Mode (Edge-Activated) Standby Mode (/CE = "0") Power Down Mode (/CE = "1")
  • 16. BUZZER • A buzzer or beeper is a signaling device, usually electronic, typically used in automobiles, household appliances
  • 17. ADVANTAGES Advantages: • As IR transmitter and receiver are inexpensive • Power consumption is very low • The equipment is less in size, hence it can be easily carried
  • 18. FUTURE SCOPE The IR rays are not omnidirectional. They exhibit line of sight property. Due to this reason the person can only identify the obstruction that is straight to him. Inorder to cover the entire region surrounding the person the system can be developed using RFID transmitter and can be used more effectively in future.
  • 20. CONCLUSION In this work the methodology of detecting any obstruction is described. The application helps in providing assistance for the blind people against the obstruction. Whenever it detects the object, it intimates the user through voice processor and the buzzer.