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Data Acquisition & LabView

Data Acquisition & LabView. Lecture goals… Learn the basics of how to use and modify LabView Virtual Instruments Become familiar with the data acquisition hardware used in the lab Note : some screen shots may be from prior versions of LabView, but the functionality is essentially unchanged….

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Data Acquisition & LabView

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  1. Data Acquisition & LabView • Lecture goals… • Learn the basics of how to use and modify LabView Virtual Instruments • Become familiar with the data acquisition hardware used in the lab Note: some screen shots may be from prior versions of LabView, but the functionality is essentially unchanged… Prof. Sailor

  2. Getting Started Start  Programs  National Instruments LabView Prof. Sailor

  3. Prof. Sailor

  4. More than 100 pages… some very useful info…. Prof. Sailor

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  9. This front panel area is essentially the “front panel” of the virtual instrument that you will create. The user of your VI sees this. Prof. Sailor

  10. This block diagram (aka wiring diagram) is the “guts” of your virtual instrument. The user does not see this, but this is essentially what controls the functionality of your Instrument. It is comparable to the inside of an actual Instrument. You can see both the block diagram and front panel together by clicking “Window  Tile Left and Right” or “… Tile Up andDown” Prof. Sailor

  11. Block diagram and front panel menus • File • Edit • View • Project • Operate • Tools • Window • Help Prof. Sailor

  12. Front Panel Buttons • Run • Run continuously • Stop • Pause Prof. Sailor

  13. Block Diagram Buttons • Highlight execution Prof. Sailor

  14. Useful Toolbars – Controls and Functions • Right click in Front Panel to get Controls • Right click in Block/wiring Diagram (back panel) to get Functions Prof. Sailor

  15. Functions Prof. Sailor

  16. Functions Prof. Sailor

  17. Functions Prof. Sailor

  18. Functions Prof. Sailor

  19. Functions Select a vi Prof. Sailor

  20. Sample vi • Open LabView and select New vi • In wiring diagram add 2 numeric constants and a multiplication operator • In Instrument window add a numeric indicator or meter Prof. Sailor

  21. Cursor turns into a wiring spool. • Click on appropriate terminals to connect inputs and output of multiplication operation • Click Run button in Front panel to obtain result. Prof. Sailor

  22. LabView tips and shortcuts • Undo last <ctrl> z • Remove all broken wires <ctrl> B • Right click on a function or control to learn more about it • Properties • Description and Tip • Help (gets wiring diagram) • Wires/connections are color-coded for variable type Prof. Sailor

  23. Prof. Sailor

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  25. Data Acquisition in ME 411/511 • Hardware: • USB 12-bit Data acquisition cards • USB 24-bit 4-channel Thermocouple cards • Software: • Labview (8.x) • Virtual Instruments Prof. Sailor

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