ARD Carderock Division Bayview ID Project Professors Dr
ARD, Carderock Division, Bayview, ID Project Professors: Dr. Herb Hess & Dr. Brian Johnson DATA ACQUISITION AND DATA MANAGEMENT SYSTEM FOR AESD Summer Research Presentation August 27 th, 2008 Authors: Jarred Coulter Vishu Gupta Zane Sapp
Overview • • • Summary-Spring 2008 National Instruments Data Acquisition System (DAQ) Sensors System Applications and Capabilities Future Work-Fall 2008 2
Summary of Spring 2008 • • Statement of Work Deliverables DAQ Solutions Researched Potential Design Issues 3
Statement of Work • • • 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 4
Deliverables • Report of Potential design solutions • Recommended System Selection Report • Working prototype • Report on Final Configuration 5
DAQ’s Researched • • • Iotech Log. Book Stand Alone, Intelligent PC-Based Data Acquisition Systems Models 300 and 360. Iotech Multi. Scan 1200. NI Compact DAQ Series 6
Potential Design Issues • 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 500 V Channel to Channel Isolation or common mode voltage rating is inadequate for high voltage from batteries. 7
National Instruments Data Acquisition System (DAQ) • System Architecture Overview • Hardware • Software 8
System Architecture 9
Benefits of NI Hardware • 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 • 10
DAQ System Hardware DATA ACQUISITION SYSTEM FROM NATIONAL INSTRUMENTS SYSTEM COMPONENTS 1. 2. 3. 4. 5. 6. PXI/SCXI Combination Chassis MXI Express Link M-Series DAQ and PXI/SCXI Chassis Controller 32 -Channel Input Module/Multiplexer I/O Connector M-Series DAQ (Not Shown) Cast Screw Terminal Block for SCXI-1104 C with Cold Junction Compensation 11
DAQ System Software • Lab. VIEW 8. 2 • Lab. VIEW Signal Express • Measurement and Automation Controller (MAX) 12
Lab. VIEW 8. 2 Built in VI’s for Data Acquisition, Analysis, Storage, Display • Mathscript capabilities • Stores all data in an ASCII text file called Lab. VIEW Measurement File (LVM) • DAQmx and DAQ Assistant for Easier Programming • 13
Lab. View Signal Express No Programming Data Acquisition • Export Data Directly to Excel Spreadsheet or Text Editor • Real-Time Display • 14
Measurement and Automation Controller (MAX) Manage all the National Instruments Hardware • Automatically Detects all devices connected to system • 15
Sensors • 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 16
Isolation Amplifier Schematic 17
Spice Simulation 18
Experimental Results 19
ABB Voltage Transducer 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 20
LEM Current Transducer LEM DC-C 10 FEATURES • • DC Current Transducer 3 Jumper Adjustable Ranges: 5, 10, 20 Amp Max Supply Voltage: 20 -50 VDC ± 1% Accuracy at TA=25 C 21
System Applications and Capabilites • 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 Lab. VIEW for Transforms and Harmonic Analysis 22
Future Work-Fall 2008 • Lab. VIEW Programming For: • Data Management • Storage • Display • Analysis • Switching Scheme for Controlling Sensors Powered by Batteries • Need to be able to turn them off when not acquiring data • • GPS Interface • Time Stamping • Link time to Master Clock • Location Stamping • Onboard Data Storage Buffer 23
Testing and Calculations • Testing • Determine Latency for Real Time • Determine Power Consumption • Calculate Cost Per Channel for Multiple Chassis Configuration • Determine Bandwidth for Multiple Chassis Configuration 24
Summary • Spring 2008 SOW • Deliverables • DAQs • Design Issues • • Summer 2008 • • • NI DAQ and Lab. VIEW Software Sensors Fall 2008 • • Lab. VIEW Programming Sensor power and control Onboard storage Testing 25
Acknowledgements ONR Alan Griffitts Frank Jurenka Karl Sette MRCI Dr. Brian K. Johnson Dr. Herbert L. Hess Karen Cassil Research Group John Finely Leo Lucklose Justin Schlee Sunan Huang James Randall 26
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