Web-based Interrogation

1
Web-based Interrogation Control of a Power
QualityData Acquisition Device

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DESIGN TEAM
Glenn Wilson
Dr. Mark Halpin
Team Advisor
Team Leader Web Page Software Design Research
Jason Koberger Hardware Design Research Testing
Melissa Wilson Documentation Hardware
Design Research
3
Outline

• Power Quality Background
• Current Data Acquisition Device
• Problem
• Solution
• Design Constraints
• Test Specifications
• A Glimpse of the Future

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Power Quality Background

• Relatively New Concept
• Power Deregulation
• Increased Technology
• What is Quality Power?
• Reliable Operation
• Proper Grounding Wiring
• Acceptable Signal Levels
• Smooth Signal Waveforms

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Current Data Acquisition Device

• Voltage Divider Dumb Terminal
• Download Information from Data Acquisition Card
• Computer Required to Access Data

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Problem

• Signal Information is not Readily Available
• Remotely
• Nonexistent
• On-site
• Must have computer available

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Design Constraints

• Temperature 0-50 C
• Display Accuracy min 1V increment 1V
• min 0.1A
  increment 0.1A
• Tri-State Status Indicator Good, Marginal
  Unacceptable Signal Levels
• Update Frequency once per ½ second
• Browser Capability Netscape Microsoft

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Design Constraints

• Server Windows NT IIS
• Coordination LCD display Port Indicator
• Physical Packaging Physical Constraints of
  Existing Device
• Communication Constraints A/D Card or RS232
  Serial Port
• Cost 50.00

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Approach

• Remotely
• Web Interface Designed
• Access Current Readings from Device
• Access Historical Data from Device
• Display Graph of Historical Information

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Approach

• On-site
• 4-Channel Voltmeter
• LED/LCD Display Added
• Good/Bad Signal Indicator
• Button(s) to Cycle Through LED/LCD Data

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Test Specifications
REQUIREMENTS CIRCUIT MODELING SOFTWARE TESTING DEBUGGING THERMAL TESTING INSTRUMENT TESTING
Temperature
Display Accuracy
Tri-State Status Indicator
Update Frequency
Browser Capability
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Test Specifications
REQUIREMENTS CIRCUIT MODELING SOFTWARE TESTING DEBUGGING THERMAL TESTING INSTRUMENT TESTING
Server
Coordination
Physical Packaging
Communication Constraints
Cost
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Test Specs Description

• Circuit Modeling
• Size Limitations
• Within Budget Requirements
• Correct Functionality
• Resources
• AutoCAD 14
• Electronics Workbench 4.1

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Test Specs Description

• Software Testing and Debugging
• Virtual Circuit
• Design Interface
• Develop Server Components
• Resources
• Microsoft Internet Information Server
• Microsoft Visual C Visual Basic
• Forte for Java CE

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Test Specs Description

• Thermal Testing
• Functionality at Specified Temperature Range
• Resources
• Space Heater
• Thermocouple
• Stopwatch

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Test Specs Description

• Instrument Testing
• Performed on Final Product
• Accuracy of LED/LCD Display Tested
• Coordination Between Display and Signal LED
• Update Frequency Tested
• Resources
• LabVolt Stations
• Programmable Function Generators

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A Glimpse of the Future
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Questions?
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References

• 1 Home Power Quality, http//energyoutlet.co
  m/res/powerqual/index.html, Energy Outlet, Iris
  Communications, Inc, USA, 1996.
• 2 R. C. Dugan, M. F. McGranaghan, and H. W.
  Beaty, Electrical Power Systems Quality,
  McGraw-Hill, New York, New York, USA, p. 1-3,
  1996.
• 3 W. M. Grady and A. H. Noyola, End User and
  Electric Utility Perspectives, Results of Power
  Quality Surveys in the United States, University
  of Texas at Austin, Austin, Texas, USA, 1995.
• 4 C. Peacock, Interfacing the PC,
  http//www.beyondlogic.org/serial/serial3.htm,
  USA, February 28, 2000.

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References

• 5 T. Cambra, Developing a Visual Basic
  Component for IIS/MTS, http//msdn.microsoft.com/
  workshop/server/components/vbmtsiis.asp,
  Microsoft Development Network, USA, June 19,
  1998.
• 6 D. Adair, J. Ball, and M. Pawlan, Trail 2D
  Graphics, http//web2.java.sun.com/
  docs/books/tutorial/2d/index.html, Sun
  Microsystems, USA.
• 7 P. Coleman and M. Halpin, Long Term
  Monitoring, 1999 Southeastern Meter School
  Conference, pp. 2-3, Birmingham, Alabama, USA,
  1999.
• 8 W. Berry, COM Objects and ASP,
  http//msdn.microsoft.com/workshop/server/
  asp/comtutorial.asp, Microsoft Development
  Network, USA, January 12, 1998.

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References

• 9 LCD Products, http//www.eio.com/lcdprodt.h
  tm, Electronics Information Online, USA, August
  23, 2000.
• 10 Newark Electronics http//www.newark.com,
  Newark Electronics, USA, 2000.
• 11 R. Moffat, ElectronicsCooling,
  http//www.electronics-cooling.com/Resources/ECArt
  icles/JAN97/jan97-01.htm, Stanford University,
  Stanford, California, USA, January 1997.
• 12 California Instruments Programmable AC
  Power Sources,
• http//www.ixpres.com/calinst/acpower.htm,
  California Instruments, San Diego, California,
  USA, September 2000.