2. 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

3. 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

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

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

6. Layout of Project Grid

9. 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

10. Hardware

11. Monitoring System MonitoringSystem ReceiverTransmitter

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

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

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

15. Transmitter Circuit Design 12V Battery TesterInfrared Transmitter

16. PCB for Transmitter

17. Monitoring System Simulation 3 kHz output from the Transmitter Frequency

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

19. Receiver Circuit Design Active Indicators Receiver Sensor

20. PCB for Receiver

21. Monitoring System Simulation Receiver detecting the transmitter signal

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

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

24. Cost/Availability Factors Transmitter and ReceiverTransmitter and Receiver Voltage Regulator and RelayVoltage Regulator and Relay 555 Timer and 74123555 Timer and 74123 Push Button and 7432Push Button and 7432 Package itemsPackage items Other componentsOther components Estimated Cost: $ 200.00 $ 6.00 $ 5.00 $ 15.00 $ 25.00 ------------------- Total: $256

25. FUTURE WORK Test SystemTest System Proximity SystemProximity System

26. SUMMARY ProblemProblem SolutionSolution ApproachApproach

27. DEMONSTRATION

28. Layout of Project Grid

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

30. Question & Answers

31. Layout of Project Grid

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