SENIOR DESIGN TEAM SENIOR DESIGN TEAM Design Team Leader: Ted Anderson Design Team Members: Cedric George, Dale Pittman Faculty Advisor: Dr. Randolph Follett Project Advisor: Dr. Gary McFadyen T. K. Martin Center

PROBLEM STATEMENT Hearing-impaired employeeHearing-impaired employee Unable to hear forklift due to his impairmentUnable to hear forklift due to his impairment Creates an unsafe working conditionCreates an unsafe working condition

OBJECTIVES Enhance safety conditionsEnhance safety conditions Develop assistive technologyDevelop assistive technology Develop practical and cost effective solutionDevelop practical and cost effective solution

DESIGN CONSTRAINTS SafetySafety Monitoring SystemMonitoring System Power SpecificationPower Specification DurabilityDurability Physical PackagingPhysical Packaging CostCost

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Transmitter 1 Receiver 1 Transmitter 2 Receiver 2 Transmitter 3 Receiver 3 Transmitter 4 Receiver 4 Transmitter 5 Receiver 5 Transmitter 6 Receiver 6 Transmitter 7 Receiver 7 Pager Unit Guardian 2000 Overview

Hardware

Monitoring System MonitoringSystem ReceiverTransmitter

InfraredLEDInfraredLED 555 Timer 12 Volt Battery Tester 12 Volt Battery Tester Transmitting Photo Diode

CALCULATIONS Period (T) Low High High (t 1 ) Time t2t2

CALCULATIONS Voltage Comparison Fixed gain inverted amplifier Fixed gain non-inverted amplifier Vo is Positive if V1 < V2 Vo is Positive if V1 > V2

Transmitter Circuit Design 12V Battery TesterInfrared Transmitter

PCB for Transmitter

Monitoring System Simulation 3 kHz output from the Transmitter Frequency

Monitoring System Infrared Signal Infrared Receiver Sensor Infrared TransmitterTransmitter Strobe Light Sensor Indicators

Receiver Circuit Design Active Indicators Receiver Sensor

PCB for Receiver

Monitoring System Simulation Receiver detecting the transmitter signal

Monitoring System Simulation Output indicates an unbroken beam Transmitter Output Receiver Output

Monitoring System Simulation Transmitter Output Output indicates broken beam !!!! Receiver Output

Cost/Availability Factors Transmitter and ReceiverTransmitter and Receiver Voltage Regulator and RelayVoltage Regulator and Relay 555 Timer and Timer and Push Button and 7432Push Button and 7432 Package itemsPackage items Other componentsOther components Estimated Cost: $ $ 6.00 $ 5.00 $ $ Total: $256

FUTURE WORK Test SystemTest System Proximity SystemProximity System

SUMMARY ProblemProblem SolutionSolution ApproachApproach

DEMONSTRATION

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Environmental Problems What type of environmental problems may affect the sensors? affect the sensors? 1.Dust 2.Moisture 3.Smoke

Question & Answers

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Pager and Test System Receiver VibratingMotor Receiver (Detector System) Transmitter TestButton Pager Unit