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LabVIEW

 
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The eBook with 100 pages shows the basics of electrical measurement technology and the basics of programming with the LabVIEW graphical programming language of the company National Instruments. In the eBook, the following instruments analog multimeter, digital multimeter, digital oscilloscope are explained in detail.

LabVIEW

 
It is shown how to measure a DC voltage or direct current, as well as an AC voltage with an analog and digital multimeter how to program the different measuring ranges.

How is a voltage with an A/D-converter digitized. Why do you need fast A/D-conversions (Nyquist-Shannon law). How to modele an oscilloscope with a sound card.

A little math, namely the theory of error-analysis which are explained here with reference to detailed examples in LabVIEW.

Operating the Oscilloscope is shown based on films in a virtual oscilloscope. At the end of eBooks some important features of LabVIEW are shown using examples (histogram, save, load, real-time, FFT, etc.). The eBook does not have to explain the claim LabVIEW, with all its possibilities. There are already appropriate books on the market. Here we explain the basics of measurement with LabVIEW.

content


Introduction to LabVIEW

  • LabVIEW
  • Text or graphic
  • Interactive Windows interface
  • New project
  • Front panel and block diagram (Example_01.vi)
  • Two switches to AND (Example_02.vi)
  • Numerical values (Example_03.vi)
  • Addition (Example_04.vi)
  • String (Example_05.vi)
  • Function graph (Example_07.vi)
  • Libraries

 Analogue multimeter

  • What does measuring mean?
  • Voltage measurement
  • Voltmeter and internal resistance
  • Voltmeter with LabVIEW (Example_30.vi)
  • Electromechanical measured value display
  • Moving - coil movement
  • Voltage measuring ranges
  • Current measurement

 Error calculation

  • Measurement error
  • Absolute indication of the uncertainty of measurement
  • Relative indication of the measurement uncertainty
  • Accuracy class of analogue measuring instruments
  • Systematic and random deviation (Example_31.vi)
  • Systematic and random deviation (Example_31.vi)
  • Accuracy and precision
  • Resolution and sensitivity
  • Mean value
  • How to determine the measurement uncertainty?
  • Error calculation or error propagation
  • Measure current and voltage simultaneously
  • Error propagation in current and voltage measurement
  • Example analog multimeter

 Digital multimeter and DC voltage

  • Introduction
  • Sampling and A/D converter
  • Decimal display (Example_40.vi)
  • Sampling in LabVIEW (Example_40.vi)
  • A/D conversion in LabVIEW (Example_42.vi)
  • Normalize display to 10V (Example_43.vi)
  • Measuring ranges (Example_44.vi)
  • SWITCH-CASE (Example_44.vi)
  • FOR, WHILE an other loops
  • Sound card as A/D converter
  • Professional measuring cards
  • Interfaces in LabVIEW
  • Measuring errors with digital measuring instruments
  • Measuring errors with digital measuring instruments
  • Bit number and resolution
  • A/D converter Measurement error
  • Display 3.5 digits
  • Scan faster!

 Digital multimeter and AC voltage

  • Introduction
  • Measure 220V/50HZ with DC measuring range
  • Rectify (Example_61.vi)
  • LP-Filter (Example_62.vi)
  • LP-Filter (Example_62.vi)
  • One factor makes everything good! (Example_63.vi)
  • Sine with noise (Example_64.vi)
  • Sine with rectangle (Example_65.vi)
  • Only square wave signal (Example_66.vi)
  • True RMS
  • True RMS in LabVIEW
  • Oscilloscope

 Oscilloscope and signals over time

  • Introduction
  • Analog electron beam oscilloscope
  • Simulation analog oscilloscope
  • Start oscilloscope
  • Set amplitude and time base
  • Set X and Y range
  • Time range Magnification
  • Two channels
  • AC/DC/GD
  • Triggering
  • Triggering
  • Measuring head
  • Cut-off frequency of the oscilloscope
  • Digital oscilloscope
  • Nyquist-Shannon sampling theorem
  • Anti-Alias-Filter
  • Memory and bandwidth
  • Measuring cards
  • Accuracy of oscilloscopes
  • Digital oscilloscope with sound card (Example_68.vi)
  • Digital oscilloscope with sound card (Example_70.vi)
  • Graph parameters internal (Example_70.vi)
  • Graph Parameter external (Example_70.vi)

 Other measuring methods and instruments

  • Histogram and statistics  (Example_71.vi)
  • Two signals in one graph  (Example_72.vi)
  • Save signals in the file  (Example_73.vi)
  • Load signals from the file  (Example_74.vi)
  • Spectrum FFT  (Example_75.vi)
  • Digital filter  (Example_76.vi)
  • X-Y representation  (Example_77.vi)
  • Logic analyzer
  • Real time
  • Multicore
  • Examples






 


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