Mid-Semester Presentation Senior Design 1 October 8, 2009.

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Presentation transcript:

Mid-Semester Presentation Senior Design 1 October 8, 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 Configuration Phase Shift Detection Computer Engineering Jonathan Lynch Sine Wave Generation Website Design Circuit Board Production Electrical Engineering

 Problem  Solution  Constraints TechnicalTechnical PracticalPractical  Alternatives  Progress

 Dr. Jack Liu of the Department of Forestry Products requires the use of a portable RF moisture content sensor  Needs a smaller, inexpensive, repackage of his patented prototype

The Actual RF Apparatus [1]

  Repackage his working prototype by using integrated circuits to replace test-bench equipment.

Power Supply Amplifier Microcontroller Waveform Generator Display Transmitting/ Receiving Sensors

 Technical Constraints  Practical Constraints

 Sensor must withstand debris, electrical noise, and moisture  Sealed, electrically shielded, rugged housing [2]

 Isolated high voltages  Partition that separates gap from user interface  Appropriate warning labels displayed [3]

Wall Plug Voltage Range Low Current Output Switching Power Supply Charge Pump -- DC/DC Converter --

Temperature Stability No Distortion Discrete Oscillator - Integrated Circuit Analog Filter Circuit --

Affordability Development Time Operational Amplifier Discrete Amplifier -

Phase Range High Voltage Input ResolutionTimers Logic Gates -

AugustSeptemberOctoberNovemberResearch HardwareDesign Prototyping Testing

 Configured XR2206 Waveform Generator to output 250 kHz sine wave  Ordered Power Supplies and connectors  Produced PCB for testing of PA78 350V Operational Amplifier

Programmable Oscillator

XR2206 Waveform Generator

Mean Well PS-05

OPA445 90V

PA78 350V

 [1] Radio Frequency Evaluation of Oriented Strand Board, by Xiaojian Liu, Starkville MS. [Online]Available: %20RADIO%20FREQUENCY%20EVALUATION%20OF%20ORIENTED%20STRAND%20BOARD.p df?sid=&mbox=INBOX&charset=escaped_unicode&uid=2012&number=7&filename=XiaojianLi uDissertation%20- %20RADIO%20FREQUENCY%20EVALUATION%20OF%20ORIENTED%20STRAND%20BOARD.p df.  [2] Microsoft Office Online, Clip Art us/clipart/results.aspx?qu=warning&sc=20.  [3] Google Images  [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, [Online] Available:  [5] Wood Products Notes: Methods of Moisture Content Measurement in the Lumber and Furniture Industries, by Phil Mitchell, Raleigh, NC. [Online]Available:  [6] United States of America. Federal Communications Commission. Code of Federal Regulations, Title 47, Part 15. Washington, D.C.: Federal Communications Commission,  [7] Panel Layup Operations, by Phil Mitchell, Raleigh, NC. [Online] Available: