final presentation senior design 1 november 30, 2009
TRANSCRIPT
Final PresentationFinal Presentation
Senior Design 1Senior Design 1
November 30, 2009November 30, 2009
Randall Vaughan
Sine Wave Generation
Layout and Design
Electrical Engineering
Caroline Quijano
Op-Amp Configuration
Layout and Design
Electrical Engineering
Zach Jordan
Op-Amp ConfigurationMicrocontroller Interfacing
Computer Engineering
Jonathan Lynch
Sine Wave GenerationWebsite DesignCircuit Board Production
Electrical Engineering
ProblemProblem SolutionSolution ConstraintsConstraints
• TechnicalTechnical• PracticalPractical
Prototype DesignPrototype Design Testing of SubsystemsTesting of Subsystems Design II GoalsDesign II Goals
Dr. Jack Liu of the Department of Dr. Jack Liu of the Department of Forestry Products requires the use of Forestry Products requires the use of a portable RF moisture content a portable RF moisture content sensorsensor
Needs a smaller, inexpensive, Needs a smaller, inexpensive, repackage of his patented prototype repackage of his patented prototype
The Actual RF Apparatus[1]
Repackage his working prototype by using integrated circuits to replace test-bench equipment.
Technical ConstraintsTechnical Constraints
Practical ConstraintsPractical Constraints
Constraint Description
Voltage LevelThe signal applied to the sensors must measure 80V (+/- 5V) peak-to-peak.
Frequency The sensor must produce a 250 kHz (+/- 5 kHz) sine wave.
InterfaceThe device must have a simple user interface in order to display its measurements.
Data LoggingThe device must be able to store at least 130 kilobytes of moisture content readings.
Sensor ArrayThe device must use seven 4 in. by 4 in. sensors configured in an array.
Type Constraint Description
Environmental DurabilityThe device must be able to withstand various industrial conditions such as dust and electrical noise.
Health and Safety
SafetyUser contact with high voltage signals must be prevented.
Sensor must Sensor must withstand debris, withstand debris, electrical noise, electrical noise, and moistureand moisture
Sealed, electrically Sealed, electrically shielded, rugged shielded, rugged housinghousing
[2]
Isolated high Isolated high voltagesvoltages
Partition that Partition that separates gap separates gap from user from user interfaceinterface
Appropriate Appropriate warning labels warning labels displayeddisplayed
[3]
Power Supply
Amplifier
MicrocontrollerWaveform Generator
Display
Transmitting/Receiving
Sensors
Oriented Strand Board Capacitive
Sensors
Mean Well Mean Well PS-05PS-05
XR2206 Waveform Generator
TLE 2141TLE 2141
PA69
Testing Apparatus with 5.08 cm Spacing Between Sensors
Testing Apparatus with 3.81 cm Spacing Between Sensors
Specimen 1
Specimen 2
Specimen 1
Specimen 2
PCB DesignPCB Design Enclosure DesignEnclosure Design Multiple Sensors Multiple Sensors Build Testing ApparatusBuild Testing Apparatus
[1] Radio Frequency Evaluation of Oriented Strand Board, by Xiaojian Liu, Starkville MS. [1] Radio Frequency Evaluation of Oriented Strand Board, by Xiaojian Liu, Starkville MS. [Online]Available: http://chevelle.its.msstate.edu:6777/attach/XiaojianLiuDissertation%20-[Online]Available: http://chevelle.its.msstate.edu:6777/attach/XiaojianLiuDissertation%20-%20RADIO%20FREQUENCY%20EVALUATION%20OF%20ORIENTED%20STRAND%20BOARD.pdf?%20RADIO%20FREQUENCY%20EVALUATION%20OF%20ORIENTED%20STRAND%20BOARD.pdf?sid=&mbox=INBOX&charset=escaped_unicode&uid=2012&number=7&filename=XiaojianLiuDisid=&mbox=INBOX&charset=escaped_unicode&uid=2012&number=7&filename=XiaojianLiuDissertation%20-%20RADIO%20FREQUENCY%20EVALUATION%20OF%20ORIENTED%20STRANDssertation%20-%20RADIO%20FREQUENCY%20EVALUATION%20OF%20ORIENTED%20STRAND%20BOARD.pdf.%20BOARD.pdf.
[2] Microsoft Office Online, Clip Art. 2009. [2] Microsoft Office Online, Clip Art. 2009. http://office.microsoft.com/en-us/clipart/results.aspx?http://office.microsoft.com/en-us/clipart/results.aspx?qu=warning&sc=20qu=warning&sc=20..
[3] Google Images. 2009. [3] Google Images. 2009. http://albas.id.au/images/temp/Caution%20electrical%20shockhttp://albas.id.au/images/temp/Caution%20electrical%20shock%20hazard%20inside%20sign.bmp.%20hazard%20inside%20sign.bmp.
[4] Forestry Facts: Guide for Using the Oven-Dry Method for Determining the Moisture Content [4] Forestry Facts: Guide for Using the Oven-Dry Method for Determining the Moisture Content of Wood, by R.S Boone and E.M. Wengert, Madison, Wisconsin, 1998. [Online] Available:of Wood, by R.S Boone and E.M. Wengert, Madison, Wisconsin, 1998. [Online] Available:
http://forest.wisc.edu/extension/Publications/89.pdfhttp://forest.wisc.edu/extension/Publications/89.pdf..
[5] Wood Products Notes: Methods of Moisture Content Measurement in the Lumber and [5] Wood Products Notes: Methods of Moisture Content Measurement in the Lumber and Furniture Industries, by Phil Mitchell, Raleigh, NC. [Online]Available: Furniture Industries, by Phil Mitchell, Raleigh, NC. [Online]Available: http://www.ces.ncsu.edu/nreos/wood/wpn/methods_moisture.htmhttp://www.ces.ncsu.edu/nreos/wood/wpn/methods_moisture.htm. .
[6] United States of America. Federal Communications Commission. [6] United States of America. Federal Communications Commission. Code of Federal Code of Federal Regulations, Title 47, Part 15.Regulations, Title 47, Part 15. Washington, D.C.: Federal Communications Commission, 2008. Washington, D.C.: Federal Communications Commission, 2008.
[7] Panel Layup Operations, by Phil Mitchell, Raleigh, NC. [Online] Available: [7] Panel Layup Operations, by Phil Mitchell, Raleigh, NC. [Online] Available: http://www.ces.ncsu.edu/nreos/wood/RMOG/Adobe/Panel.pdfhttp://www.ces.ncsu.edu/nreos/wood/RMOG/Adobe/Panel.pdf..