Introduction to NI ELVIS

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  • Introduction to NI ELVIS K. Craig 1

    Introduction to NI ELVIS

    Dr. Kevin CraigGreenheck Chair

    in Engineering Design&

    Professor of Mechanical EngineeringMarquette University

  • Introduction to NI ELVIS K. Craig 2

    DAQ What is DAQ?

    DAQ (data acquisition) systems capture, measure, and analyze physical phenomena from the real world.

    Light, temperature, pressure, and torque are examples of the different types of signals that a DAQ system can measure.

    Data acquisition is the process of collecting and measuring electrical signals from sensors and test probes, and sending them to a computer for processing.

    Data acquisition may also include the output of analog or digital control signals.

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    Virtual Instrumentation Virtual Instrumentation is defined as the combination of

    measurement and control hardware and application software with industry-standard computer technology to create user-defined instrumentation systems.

    Virtual Instrumentation provides an ideal platform for developing instructional curriculum and conducting scientific research. Tools must be flexible and adaptable, both in instructional labs,

    where experiments combine measurement, automation, and control, but also in research environments, where the needs are unpredictable.

    Modularity, and hence new functionality, and economy are important attributes.

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    Traditional Instrumentation

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    Engineering System Investigation Process

    PhysicalSystem

    SystemMeasurement

    MeasurementAnalysis

    PhysicalModel

    MathematicalModel

    ParameterIdentification

    MathematicalAnalysis

    Comparison:Predicted vs.

    Measured

    DesignChanges

    Is The ComparisonAdequate ?

    NO

    YES

    START HERENI ELVIS

    LabVIEW

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    NI ELVIS II

    Design and Prototyping Platform for Engineers

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    Variable Power Supply

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    Digital Multimeter

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    Function Generator

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    Arbitrary Waveform Generator

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    Oscilloscope (Time-Response Plots)

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    Bode Analyzer (Frequency-Response Plots)

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    DSA Dynamic Signal Analyzer

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    Impedance Analyzer

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    Time Domain Frequency Domain VI

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  • Introduction to NI ELVIS K. Craig 25Indicates Continuity

    ELVIS Breadboard

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    ELVIS Exercises Measurement of Component Values with the DMM

    Resistor (1.0 k and 2.2 k) Measure component values using the DMM by

    connecting the components across the Banana A and Banana B inputs.

    Resistors in Series and Parallel Building a Circuit and Measuring Voltage and Current

    using the DMM Measure Voltage Source and Current Through Single

    Resistor Voltage Divider Circuit Current Divider Circuit

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    Measuring Resistance

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    Resistors in Series

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    Resistors in Parallel

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    eout

    ein

    R2

    R12

    out in1 2

    Re eR R

    = +R2R1

    Iin

    Iout

    I1 I2

    21 in

    1 2

    12 in

    1 2

    RI IR RRI I

    R R

    = += +

    in 1 2 outI I I I= + =

    Voltage Divider

    Current Divider

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    Using the DMM to Measure Voltage

    Using the DMM to Measure Current

    Banana A

    Banana B

    Banana B Banana C

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    DC Voltage Divider

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    Measuring Current through a Resistor5voltsi 0.005122A

    0.9762k= =

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    Current Divider

    ( )

    21

    1 2

    Ri iR R

    975.90.0073592168.7 975.9

    0.002284A

    = + = +

    =

    5voltsi 0.007359A0.6794k

    = =

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    Time Response of a Voltage Divider Response to a Square Wave Input (Step Response)

    and Sine Wave input ELVIS Connections

    Circuit Input to FGEN FGEN to Analog Input Signal AI 6+ Measured Signal to Oscilloscope AI 7+ Oscilloscope AI 7- and AI 6- to DC Ground Circuit Ground to DC Ground

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    Function GeneratorFGEN

    DC Ground

    OscilloscopeChannel AI 7+

    OscilloscopeChannels AI 7- and AI 6-

    Time Response

    OscilloscopeChannel AI 6+

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    Voltage Divider Time Response

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    Frequency Response (Bode Plot) of a Voltage Divider ELVIS Connections

    FGEN to Circuit Input Measured Signal to Analog Input Signal AI 0+ FGEN to Analog Input Signal AI 1+ DC Ground to Analog Input Signals AI 0- and AI 1-

    and circuit ground

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    Function GeneratorFGEN

    DC Ground

    Analog Input SignalAI 0+

    Analog Input SignalsAI 0- and AI 1-

    Frequency Response

    Analog Input SignalAI 1+

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    Voltage Divider Frequency Response

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    Semi-Log Paper1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 2.0

    10 20 30 40 50 60 70 80 90 1001.0 1.301 1.477 1.602 1.699 1.778 1.845 1.903

    1.9542.0

    log10

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    Introduction to NI ELVISDAQVirtual InstrumentationSlide Number 4Slide Number 5Slide Number 6Slide Number 7Slide Number 8Slide Number 9Slide Number 10Slide Number 11Slide Number 12Slide Number 13Slide Number 14Slide Number 15Slide Number 16Slide Number 17Slide Number 18Slide Number 19Slide Number 20Slide Number 21Slide Number 22Slide Number 23Slide Number 24Slide Number 25ELVIS ExercisesSlide Number 27Slide Number 28Slide Number 29Slide Number 30Slide Number 31Slide Number 32Slide Number 33Slide Number 34Slide Number 35Slide Number 36Slide Number 37Slide Number 38Slide Number 39Slide Number 40Slide Number 41Slide Number 42Slide Number 43Slide Number 44Slide Number 45