Web-based Interrogation

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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
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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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Project Component Overview
HARDWARE
SOFTWARE
This was done by another group
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Hardware Issues
Why use a True RMS to DC Conversion Process?
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Software Issues

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

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Design Constraints (RMS Meter)

• 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

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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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Test Specs Description

• Circuit Modeling
• Size Limitations
• Within Budget Requirements
• Correct Functionality
• Resources
• AutoCAD 14
• Electronics Workbench 6

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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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Where are we now?

• Software
• Can read the log file.
• Developing remote interface details
• Determining log file to database conversion
  frequency
• Hardware
• Testing several circuits in Electronics Workbench
• Evaluating both cost, size and performance of the
  circuits

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Questions?