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Authors: Jarred CoulterVishu GuptaZane Sapp
ARD, Carderock Division, Bayview,IDProject Professors: Dr. Herb Hess & Dr. Brian
Johnson
Summer Research PresentationAugust 27th, 2008
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• Summary-Spring 2008 • National Instruments Data
Acquisition System (DAQ)• Sensors• System Applications and
Capabilities• Future Work-Fall 2008
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• Statement of Work• Deliverables• DAQ Solutions Researched• Potential Design Issues
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• Designing a data acquisition system (DAQ) that will interface with the existing systems on the AESD.
• Manage and display data from sensors for voltages, currents, and temperatures from the propulsion system and UPS system batteries.
• Correlate above data with the GPS data available.
• Graphical display: real-time and static• On board data storage buffer.• Expandable Architecture
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• Report of Potential design solutions
• Recommended System Selection Report
• Working prototype
• Report on Final Configuration
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• Iotech LogBook Stand Alone, Intelligent PC-Based Data Acquisition Systems Models 300 and 360.
• Iotech MultiScan 1200.• NI Compact DAQ Series
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• Making sure these Systems can operate in an ungrounded system.
• External Multiplexing controlled by the DAQ to allow for large number of inputs per channel.
• The 500V Channel to Channel Isolation or common mode voltage rating is inadequate for high voltage from batteries.
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• System Architecture Overview
• Hardware
• Software
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• M-Series Data Acquisition Device• 1.25 Ms/s• Up to 280 Channels per DAQ Device with Current
Configuration• 16-Bit ADC Resolution
• MXI-Express Connection• 110 Mb/s and up to 250 Mb/s Transfer Rate• PC and Laptop Compatible• High Bandwidth Allows for Large Channel Count
through Multiple Chassis
• SCXI/PXI• Hundreds of Input Modules for wide range of
Application• Rugged Chassis for Industrial Applications
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DATA ACQUISITION SYSTEM FROM NATIONAL INSTRUMENTS SYSTEM COMPONENTS
1. PXI/SCXI Combination Chassis
2. MXI Express Link3. M-Series DAQ and
PXI/SCXI Chassis Controller
4. 32-Channel Input Module/Multiplexer
5. I/O Connector M-Series DAQ (Not Shown)
6. Cast Screw Terminal Block for SCXI-1104C with Cold Junction Compensation
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• LabVIEW 8.2
• LabVIEW Signal Express
• Measurement and Automation Controller (MAX)
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• Built in VI’s for Data Acquisition, Analysis, Storage, Display
• Mathscript capabilities• Stores all data in an ASCII text file
called LabVIEW Measurement File (LVM)
• DAQmx and DAQ Assistant for Easier Programming
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• No Programming Data Acquisition• Export Data Directly to Excel
Spreadsheet or Text Editor• Real-Time Display
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• Manage all the National Instruments Hardware
• Automatically Detects all devices connected to system
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• Isolation Amplifier Type Voltage Transducers
•Designed my Own
• Cost Around 5 Dollars
•Hall Effect Voltage Transducers
• Capable of accurately handling very high voltages
• Cost around $250 per unit when bought in Bulk
•LEM Current Transducers
• Accurately Measure wide range of Currents
• Cost around $400 per unit when bough in Bulk
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LEM CV 3-500 FEATURES
• Closed Loop Hall Effect Voltage Transducer
• Measuring range: 0 to 500 V
• Output Voltage: 0 to 10 V (Max)
• Supply Voltage: ± 15 VDC• ± 0.2% Accuracy at TA=25
C
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LEM DC-C10 FEATURES
• DC Current Transducer
• 3 Jumper Adjustable Ranges: 5, 10, 20 Amp Max
• Supply Voltage: 20-50 VDC
• ±1% Accuracy at TA=25 C
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• Monitoring of Propulsion System and UPS System Battery Banks• Battery Status• Voltage • Temperature• Charge Monitoring• Possible Feedback Control for Charging Schemes
• Fuel Cell Monitoring• Harmonics Measurement and Analysis
• Measuring waveforms • LabVIEW for Transforms and Harmonic
Analysis
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• Spring 2008• SOW• Deliverables• DAQs• Design Issues• Summer 2008• NI DAQ and LabVIEW Software• Sensors• Fall 2008• LabVIEW Programming• Sensor power and control• Onboard storage• Testing
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ONRAlan Griffitts
Frank Jurenka Karl Sette
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MRCIDr. Brian K. JohnsonDr. Herbert L. Hess
Karen Cassil
Research GroupJohn Finely
Leo LuckloseJustin SchleeSunan HuangJames Randall