2. LabVIEW
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⮚Laboratory Virtual Instrument Engineering
Workbench
⮚Graphical programming language
⮚Used for data acquisition, instrument
control, and signal processing
3. LabVIEW
•G is a graphical language, so programs
look like flowcharts
•Program modules are clicked and dragged
into place
•Modules are “wired” together, and data
flows through these “wires”
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4. ⮚Called “Virtual Instruments” (VIs)
⮚Appearance and operation imitates
actual physical instruments
Without With
LabVIEW
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5. Virtual Instrumentation Applications
• Design
• Signal and Image Processing
• Embedded System Programming
• (PC, DSP, FPGA,
Microcontroller)
• Simulation and Prototyping
• Control
• Automatic Controls and Dynamic
Systems
• Mechatronics and Robotics
• Measurements
• Circuits and Electronics
• Measurements and Instrumentation
A single graphical development
platform
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6. LabVIEW Background
• LabVIEW(Laboratory Virtual Instrumentation
Engineering Workbench)
• Nicknamed “G” for its graphical programming
• Designed by NI (National Instruments , LabVIEW 2012
was released in August 2012.
• Commonly used for data acquisition, instrument
control, and industrial automation.
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7. Basics of GSD
• Uses functions called VIs (virtual instruments) to I/O, signal
processing, computations, programming, etc.
• Connects VI icons with wires that transmit values between
functions.
• Has three components: a front panel, a block diagram, and
connector pane.
• Uses data flow, so function execute as soon as all income
data is received.
• Allows for Object /Oriented programming via subVIs and
classes.
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11. Design (Model)
•Researcher develops a mathematical model of
the system, including sensors, actuators,
plants and controllers, and simulates them
under a variety of initial conditions and
constraints.
•The researcher uses different numerical
methods with the objective of validating the
performance of the model and optimizing it
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14. Prototype (Lab)
• If experimental validation of the model is required,
researchers develop and test a prototype in the
laboratory.
• The “virtual plant/process” can be used for HIL tests.
• Usually, this experimental (prototyping) phase is
executed on standard PCs or PXI computers, using
PCI/PXI data acquisition devices or external
measuring devices connected to a PC via USB,
Ethernet, GPIB, or serial ports.
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16. Deployment (Field)
•Finally, the model (controller, analyzer or both) is
deployed in the field using a PC, or it can be
downloaded to a dedicated embedded controller such
as Compact RIO, which usually operates in stand-
alone mode and in real-time .
•For large systems, with high-channel counts or
involving modular instruments such as scopes, digital
multimeters (DMMs), RF vector signal analyzers, and
dynamic signal acquisition (DSA) devices, the PXI
platform is more appropriate.
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17. DESIGN FLOW WITHOUT GSD
Typical embedded system software and hardware
design flow.
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18. DESIGN FLOW WITH GSD
Stream-lined development flow with graphical system
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19. ADVANTAGES OF LabVIEW
•Graphical user interface
•Drag-and-drop built-in functions
•Multiple high level development tools
•Multi platforms
•Reduces cost and preserves investment
•Flexibility and scalability
•Visualization capabilities
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