voice activated door control system

8/2/2019 Voice Activated Door Control System

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Voice Activated Door ControlVoice Activated Door Control

SystemSystemUniversit y of HoustonUniversit y of Houston

College of TechnologyCollege of Technology

Senior Proj ect Team 10:Senior Proj ect Team 10:

Emerson JuarezEmerson Juarez

Son LeSon Le

Eva OkhankhueleEva Okhankhuele

Steve RudenkoSteve Rudenko

Proj ect Advisor: Dr. F. At tarzadehProj ect Advisor: Dr. F. At tarzadeh

Tuesday November 30, 2004Tuesday November 30, 2004


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IntroductionIntroduction

nnVoice activated systems can be used toVoice activated systems can be used tosimplify every day tasks such as openingsimplify every day tasks such as opening

and closing doors.and closing doors.nn These systems can also be used to controlThese systems can also be used to control

a wide array of electrical devices anda wide array of electrical devices and

components.components.nn Can perform many functions based on theCan perform many functions based on the

given commandgiven command


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PurposePurpose

nn To provide hands free and hassle freeTo provide hands free and hassle freeoperation of a door (opening/closing) in aoperation of a door (opening/closing) in a

home or an office environmenthome or an office environmentnn Other electronic devices can easily beOther electronic devices can easily be

adapted to work with the voice recognitionadapted to work with the voice recognition

system as wellsystem as well


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Voice Recognition SystemsVoice Recognition Systems

nn Words are programmed and storedWords are programmed and storedon the microprocessor of the voiceon the microprocessor of the voicerecognition circuitrecognition circuit

nn While the circuit is powered on itWhile the circuit is powered on itconstantly listens for externalconstantly listens for externalcommandscommands

nn When a command is recognized itWhen a command is recognized itsends an appropriate signal to itssends an appropriate signal to itsoutput port to activate attachedoutput port to activate attachedinterface cards and/or devicesinterface cards and/or devices


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Relay Interface Board (SPDTRelay Interface Board (SPDT

Switches)Switches)

This is the relay interface circuit that connects to the voice

recognition card. It contains 10 SPDT switches that can controlup to 10 external devices


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Future of Voice RecognitionFuture of Voice Recognition

nn Although voice recognition systems have been out onAlthough voice recognition systems have been out onthe market for some time they have not yet fullythe market for some time they have not yet fullydeveloped to their full potentialdeveloped to their full potential

nn Voice recognition systems are not yet able to filter out aVoice recognition systems are not yet able to filter out aspecific voices/commands in the presence of noise orspecific voices/commands in the presence of noise orcross talk. In the future these systems will be able tocross talk. In the future these systems will be able tofilter out a certain voice when many voices are presentfilter out a certain voice when many voices are presentand heard all at onceand heard all at once

nn

Voice recognition systems are not able to understand theVoice recognition systems are not able to understand thetrue meaning of the command. In the future thesetrue meaning of the command. In the future thesesystems will be able to understand the commandsystems will be able to understand the commandspoken. Example: "Do what I mean, not what I say!"spoken. Example: "Do what I mean, not what I say!"


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SpecificationsSpecifications

nn The system can operate on one 9 V alkalineThe system can operate on one 9 V alkalinebattery or a DC adapter rated at 9battery or a DC adapter rated at 9--12V12V

nn The system can recognize either forty .96The system can recognize either forty .96second words or twenty 1.92 second wordssecond words or twenty 1.92 second words

nn For memory the circuit uses an 8K X 8 staticFor memory the circuit uses an 8K X 8 staticRAMRAM

nn 2 modes of operation2 modes of operation CPU and ManualCPU and Manual

nn Controls up to 10 external devices using a relayControls up to 10 external devices using a relayinterface card that utilizes SPDT switches or aninterface card that utilizes SPDT switches or aninterface card that produces TTL logic outputinterface card that produces TTL logic output


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Key ComponentsKey Components

nnVoice Recognition CircuitVoice Recognition Circuit

nn Relay Interface Circuit (SPDT Switches)Relay Interface Circuit (SPDT Switches)

nn HH--Bridge DC Motor Control CircuitBridge DC Motor Control Circuitnn 6 Speed Gear System & DC Motor6 Speed Gear System & DC Motor

nn SN74LS86 Quad 2SN74LS86 Quad 2--Input Exclusive ORInput Exclusive OR

Gate and LM555 Precision TimerGate and LM555 Precision Timer -- 8 Pin8 PinDIP (Used in conjunction with the HDIP (Used in conjunction with the H--Bridge for motor timing configuration)Bridge for motor timing configuration)


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HH--Bridge DC Motor ControllerBridge DC Motor Controller

CircuitCircuit

H-Bridge circuit is the main component used in controlling theoperation of the DC motor (forward and reverse operation)


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Practical ImplicationsPractical Implications

nn Mechanical aspects of designing the doorMechanical aspects of designing the dooropening mechanism and gear systemopening mechanism and gear system

nn Obtaining enough torque to successfullyObtaining enough torque to successfullyopen and close a door using a 3open and close a door using a 3 4.5 V4.5 VDC motorDC motor

nn Timing considerations of the motorTiming considerations of the motoroperationoperation


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Product Operation FlowchartProduct Operation Flowchart

Voice

Recognition

Circuit

Relay

Interface

Card

SN74LS86

XOR Gate

Voice

Command

Motor and

Gear Box

H-Bridge

Motor

Controller

555 Timer

Door opens

or closes


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Assembly ProcessAssembly Process

nn Assemble and test the speech recognitionAssemble and test the speech recognitionsystem and the relay interface cardsystem and the relay interface card

nn

Setup and test the HSetup and test the H--Bridge motor control circuitBridge motor control circuitnn Assemble the model door and the door frameAssemble the model door and the door frame

nn Put together the logic and timing circuits thatPut together the logic and timing circuits thatcontrol the Hcontrol the H--BridgeBridge

nn Assemble the gear system and the motorAssemble the gear system and the motornn Interface all the various components and testInterface all the various components and test

the overall systemthe overall system


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Design AlternativesDesign Alternatives

nn Use a stepper motor and a stepper motorUse a stepper motor and a stepper motordriver circuit instead of an Hdriver circuit instead of an H--Bridge and aBridge and a

DC motorDC motornn Use switches instead of 555 timers to stopUse switches instead of 555 timers to stop

the door when it is fully opened or closedthe door when it is fully opened or closed

nn Use a pulley system instead of a gearUse a pulley system instead of a gearsystem to open and close the doorsystem to open and close the door


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CostsCosts

$0.00$20.00

$40.00

$60.00

$80.00

$100.00

$120.00

$140.00

$160.00

$180.00

$200.00

Speech

RecognitionKit

Speech

RecognitionI nterface and

Relays

6 Speed

Gearbox Kit

Model door

Cabinet

Miscellaneous

Components


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Product DemonstrationProduct Demonstration


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Questions ?Questions ?

voice activated door control system

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