LIFFT

VOICE OPERATED INTELLIGENT ELEVATOR/LIFT

PROJECT MEMBERS

1.Ch.bharadwaja(09H71A0406)

2.N.Ramya(09H71A0427)

3.K.Satyalakshmi(10H75A0404)

4.N.Srinivas rao(09H71A0442)

AGENDA

1. Introduction2. Block diagram and working3. Introduction to AT89S524. Power supply5. crystal oscillator6. Microphone7. Stepper Motor8. Voice Recognition module9. Floor sensor (Combination of IR Tx & IR Rx)10. Liquid crystal display (LCD)11. Advantages and Applications12. Conclusion13. References

ABSTRACT

Man has come a long way in terms of development over a period of time.

His inventions was breakthrough in technology, which has enabled man to simplify many jobs.

 This project aims to make the operation of elevator controlled by human voice.

Pressing buttons of respective floors is difficult when a person is blind, physically challenged or is having lot of luggage in hands.

INTRODUCTION

BLOCK DIAGRAM

POWER SUPPLY

EXTRA FEATURES OF 8052

8052 has some extra features compared to

8051 8kb on-chip program memory 256bytes on-chip data memory Timers are 3 Interrupts are 8

INTERNAL ARCHITECTURE OF 8052

PIN DIAGRAM

MICROPHONEoA microphone   is an acoustic-to-electric transducer or sensor that converts sound into an electrical signal.

oThe sensitive transducer element of a microphone is called its element or capsule.

o A complete microphone also includes a housing, some means of bringing the signal from the element to other equipment, and often an electronic circuit to adapt the output of the capsule to the equipment being driven.

o A wireless microphone contains a radio transmitter.

VOICE RECOGNITION MODULE Speech recognition basically means talking to a computer, having

it recognize what we are saying, and lastly, doing this in real time.

This process fundamentally functions as a pipeline that converts PCM (Pulse Code Modulation) digital audio from a sound card into recognized speech.

Transform the PCM digital audio into a better acoustic representation

Unit matching system Lexical Decoding Apply a "grammar“ Figure out which phonemes are spoken

STEPPER MOTOR

A stepper motor is an electro-mechanical device which converts electrical pulses into discrete mechanical movements.

The shaft or spindle of a stepper motor rotates in discrete step increments when electrical command pulses are applied to it in the proper sequence.

The speed of the motor shafts rotation is directly related to the frequency of the input pulses and the length of rotation is directly related to the number of input pulses applied.

FLOOR SENSOR

IR TRANSMITTER

IR RECEIVER

IR RECIEVER

Normally the port maintains logic high state when the signal light is at OFF state; it maintains logic 0 when it is at ON state.

The program written in the micro controller gets the data from the port pin transfers appropriate code to the serial buffer 89S52.

The 300bps is developed from the basic crystal frequency 11.052MHz.

The frequency is divided to 300bps with the help of internal timer counter register.

The transmitted data is given to the IR modulator.

IR RECIEVER: The receiver is having IR photo diode and IR

processing comparator opamp This asynchronous data is given to RXD pin

of micro controller the data received at RXD pi of the micro controller converts into parallel subsequently stores in serial buffer. The serial setting is same as the setting of transmitter

LCD DISPLAYS

LCD screen is an electronic display module and

find a wide range of applications.

A 16x2 LCD is very basic module and is very

commonly used in various devices and circuits.

These modules are preferred over Seven

segments  and other multi segment LEDs.

Reason : LCDs are economical, easily

programmable, and have no limitation of

displaying special and even custom characters.

It can display 16 characters per line and there

are 2 such lines.

In this LCD each character is displayed in 5x7

pixel matrix.

ADVANTAGES AND APPLICATIONS

ADVANTAGES: Can easily operate elevator by simply speaking. Boon for physically challenged people. Cost of manufacture is less. Flexibility of using in various applications. Speech recognition allows for quick response and recovery of stalled

hardware. Simple circuitry: no special or proprietary hardware is required, can

be incorporated into the integrated circuit of a product. 

APPLICATIONS: Easily applicable in various industries and in apartments also.  Voice controlling capabilities eliminate the need for manual power

audits as well as provide immediate alerts to potential problems  The ability to speech control at the rack level can provide a

huge return on investment by providing savings in both man hours and downtime.  

It can be optimized for many applications.  Suitable for voice control robots.

CONCLUSION Speech is the primary and most convenient

means of communication between humans. Speech recognition is the process of recognizing

the Spoken word to take necessary actions accordingly.

The controlling devices of the whole system are Microcontrollers. Speech recognition module, wireless transceiver modules,and DC motors are interfaced to Microcontroller.

In this project, a simple but reliable approach to control lift by speech recognition is presented. We Conclude that this project will be useful to everyone

REFERENCES

The 8051microcontroller and embedded systems:

MUHAMMAD ALI MAZIDI and JANICE GILLISPIE MAZIDI    Microprocessors and interfacing: DOUGLAS V-HALL  Advanced microprocessor and interfacing: A.K.RAY

&BURICHAND The 8051 microcontroller: KENNETHJ.AYALA