PowerPoint Presentation

Audio Guidance for BlindSUnder the Guidance of :HEMA. S.R6/9/2015AUDIO GUDIENCE FOR BLINDS1 Project associates:Ashish S RDeepak BRaksha R SRashmi A M1overviewIntroductionExisting solutionsObjectiveWorking principleBlock diagramHardware componentsSoftware componentsResultconclusion

6/9/2015AUDIO GUDIENCE FOR BLINDS2IntroductionThere are approximately 12 million blind or visually impaired people in the India alone.

Currently most blind people rely on other people, dogs, and their canes to find their way in buildings.

Many disabled people prefer to do things independently rather than rely on others.

The Audio Guidance For Blinds can provide a solution to this problem6/9/2015AUDIO GUDIENCE FOR BLINDS3Existing solutionsSmart Canes provide obstacle detection.

Sonar vision glasses also may provide obstacle detection.

GPS navigation systems provide directions, but not reliable or accurate enough for use in buildings.

6/9/2015AUDIO GUDIENCE FOR BLINDS4ObjectiveThe main goal of the project is to provide a cost- effective solution to allow blind people to navigate within building.

The Audio Guidance System hopes to allow visually impaired users to simply speak the desired destination, and be guided there with the use of audio instructions.

The system hopes to provide a portable unit that can easily be carried and operated by a visually impaired user. It could easily be incorporated into a walking cane.

6/9/2015AUDIO GUDIENCE FOR BLINDS5Working PrincipleThe technique is used to determine the destination location by using RFID. In this technique unique RFID tag is assigned to each of the locations inside the buildings such as steps, rooms, elevator, rest room etc. RFID reader continuously scans the tag and if the destination code matches with that of present RFID code then the person has reached his desired location. If the code does not matches then the system has to guide him to his destination location. 6/9/2015AUDIO GUDIENCE FOR BLINDS6Working flow6/9/2015AUDIO GUDIENCE FOR BLINDS7

Block Diagram6/9/2015AUDIO GUDIENCE FOR BLINDS8

ComponentsHM-2007 Speech recognition kit P89V51RD2 Micro controller APR9600 module EM-18 RFID Reader and Tags Speaker or Headphone LCD

6/9/2015AUDIO GUDIENCE FOR BLINDS9Schematic diagram6/9/2015AUDIO GUDIENCE FOR BLINDS10

Hm2007 speech recognition moduleHM2007 is programmable, in the sense that programmer train the words (or vocal utterances) as programmer want the circuit to recognize.In our project we are using HM2007 module to convert the voice input given by the blind into binary codes which is required by the micro-controller to scan the tags.This module is connected to PORT 0 of microcontroller.6/9/2015AUDIO GUDIENCE FOR BLINDS11Hm-2007 SPEECH RECOGNITION MODULE (contd..)

SpecificationsInput Voltage - 9 to 15 V DC Use a commonly available 12V 500ma DC Adapter.Output Data - 8 bits at 5V Logic Level.Interface-Any microcontroller like 8051, PIC or AVR can be interfaced to data port to interpret.6/9/2015AUDIO GUDIENCE FOR BLINDS12P89V51RD2 MICROCONTROLLER

Features 80C51 CPU with 5V operating voltage from 0 to 40 MHz. 64 kB of on-chip flash user code memory. Four 8-bit I/O ports.6/9/2015AUDIO GUDIENCE FOR BLINDS13P89V51RD2 MICROCONTROLLER(contd..)Three 16-bit timers/counters.

Programmable watchdog timer.

Eight interrupt sources with four priority levels.

Two DPTR register.

TTL- and CMOS-compatible logic levels. 6/9/2015AUDIO GUDIENCE FOR BLINDS14P89V51RD2 MICROCONTROLLER block diagram

6/9/2015AUDIO GUDIENCE FOR BLINDS15LCD

Features :JHD162A is the LCDIt has a Panel with 2 rows and 16 columns.Supply voltage Vdd = 5 v Operating voltage Idd =1.5mA Input voltage = 2.2 v

6/9/2015AUDIO GUDIENCE FOR BLINDS16APR 9600 MODULE for voice outputSingle-chip, high-quality voice recording & playback solution.

Non-volatile Flash memory technology

User-Selectable messaging options

User-friendly, easy-to-use operation.

Low power consumption.Operating current: 25 mA typicalStandby current: 1 uA typicalAutomatic power-down

Chip Enable pin for simple message expansion

6/9/2015AUDIO GUDIENCE FOR BLINDS17APR 9600 MODULE(contd..)Pin diagramThe APR9600 device offers true single-chip voice recording, non-volatile storage, and playback capability for 40 to 60 seconds.The device supports both random and sequential access of multiple messages.

6/9/2015AUDIO GUDIENCE FOR BLINDS18APR 9600 MODULE

6/9/2015AUDIO GUDIENCE FOR BLINDS19RFID reader & tags A basic RFID system consists of three components:

An antenna or coil.

A transceiver (with decoder). A transponder (RF tag)6/9/2015AUDIO GUDIENCE FOR BLINDS20RFID reader & tags (contd..)RFID ReaderRFID Tag

6/9/2015AUDIO GUDIENCE FOR BLINDS21Rfid reader & TAGS(contd..) ADVANTAGES OF RFIDNo line of sight requirements

RFID tags can be read through materials without line of sight.

More automated reading and allowing more proactive, real-time tracking.

Improved read rates

Greater data capacity6/9/2015AUDIO GUDIENCE FOR BLINDS22SPEAKER

6/9/2015AUDIO GUDIENCE FOR BLINDS23Software descriptionMicrocontroller needs to support all hardware components so to make it supportive we use Keil software.

Keil provides the ease of writing the code in either C or ASSEMBLY language.6/9/2015AUDIO GUDIENCE FOR BLINDS24KEIL UVISION 2 This is an IDE (Integrated Development Environment) that helps programmer to write, compile, and debug embedded programs. It encapsulates the following components:

A project manager.

Tool conguration.

Editor. A powerful debugger.6/9/2015AUDIO GUDIENCE FOR BLINDS25CREATION OF NEW PROJECT6/9/2015AUDIO GUDIENCE FOR BLINDS26

SELECTING THE DEVICE6/9/2015AUDIO GUDIENCE FOR BLINDS27

CONFIGURING THE ESSENTIALS6/9/2015AUDIO GUDIENCE FOR BLINDS28

ADDITION OF FILES IN SOURCE GROUP6/9/2015AUDIO GUDIENCE FOR BLINDS29

RUNNING THE PROGRAM6/9/2015AUDIO GUDIENCE FOR BLINDS30

Code flow6/9/2015AUDIO GUDIENCE FOR BLINDS31

Code flow (contd..)6/9/2015AUDIO GUDIENCE FOR BLINDS32

AdvantagesAs mentioned previously with 12 million visually impaired people in INDIA alone,it would be smart for businesses to cater to their needs.

The use of RFID technology can help to do this at a lower cost than most other technologies on the market today.

This system would give the visually impaired an opportunity to integrate with society more easily. These people would have a greater sense of independence.

The entire system can be miniaturized so that it will be easy to carry.6/9/2015AUDIO GUDIENCE FOR BLINDS33disadvantagesLong range readers require more power and cost and RFID tag reads and read ranges may be inconsistent.

Speech recognition may be problematic due to unwanted noise and false reads.6/9/2015AUDIO GUDIENCE FOR BLINDS34 resultSnap shot of prototypeBlind person carrying final model

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conclusionThe project clearly gives a good solution in the indoor environment for blinds which is completely controlled by the microcontroller using RFID technology.

This unit is user friendly and cost effective, thus the system urges on non dependence of blinds on other people.

Hence the system could be implemented in blind schools and building where blind people work, allowing the blinds for safe navigation.6/9/2015AUDIO GUDIENCE FOR BLINDS36FUTURE ENHANCEMENTSBy making use of more sophisticated RFID tags with larger range in the future an effective guidance system for blind can be implemented.

Inside an organization the system can be implemented and developed so that the central administrator can be able to monitor the navigation of blind and can gain continuous access to his location via LAN, GSM,etc.6/9/2015AUDIO GUDIENCE FOR BLINDS37referencesThe 8051 Microcontroller Architecture, Programming & Applications, 2e Kenneth J.Ayala;,Penram International, 1996 / Thomson Learning 2005.The 8051 Microcontroller and Embedded Systems Using Assembly and C, 2e,Muhammad Ali Mazidi, Janice Gillispie Mazidi, Rolin Mckinaly.files.spogel.com./abstracts/p-0212audio guidance for blind.pdf http://en.m.wikibooks.org/wiki/embedded systems/8051 microcontroller http://en.mwikipedia.org/wiki/radio-frequency identification

6/9/2015AUDIO GUDIENCE FOR BLINDS38 Thank you6/9/2015AUDIO GUDIENCE FOR BLINDS39