Authors: Jarred CoulterVishu GuptaZane Sapp

ARD, Carderock Division, Bayview,IDProject Professors: Dr. Herb Hess & Dr. Brian

Johnson

Summer Research PresentationAugust 27th, 2008

• 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